Janković, Ksenija

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orcid::0000-0003-3744-3799
  • Janković, Ksenija (61)
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Author's Bibliography

Influence of different types of fibers on properties of concrete

Stojanović, Marko; Antić Aranđelović, Lana; Janković, Ksenija; Bojović, Dragan; Flajs, Željko

(2023)

TY  - CONF
AU  - Stojanović, Marko
AU  - Antić Aranđelović, Lana
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Flajs, Željko
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/578
AB  - The paper presents the influence of the use of different types of fibers on the properties of concrete. All concrete samples were made  with  same component materials and compositions, except for the amount of fibers, which was varied. After hardening, the concrete samples were tested for compressive strength, tensile splitting strength and water penetration depth under pressure. Based on the test results, depending on the type, shape, amount and arrangement of fibers, the tensile and compressive strength values as well as the depth of water penetration under pressure were analyzed. Based on the tests performed, the best mechanical properties were achieved with the use of "Dramix 3D" steel fibers.
C3  - International Scientific Conference SINARG 2023, organized by the Faculty of Civil Engineering and Architecture, University of Niš, and Serbian Academy of Sciences and Arts, Local Branch in Niš, Proceedings
T1  - Influence of different types of fibers on properties of concrete
EP  - 1072
SP  - 1066
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_rims_578
ER  - 
@conference{
author = "Stojanović, Marko and Antić Aranđelović, Lana and Janković, Ksenija and Bojović, Dragan and Flajs, Željko",
year = "2023",
abstract = "The paper presents the influence of the use of different types of fibers on the properties of concrete. All concrete samples were made  with  same component materials and compositions, except for the amount of fibers, which was varied. After hardening, the concrete samples were tested for compressive strength, tensile splitting strength and water penetration depth under pressure. Based on the test results, depending on the type, shape, amount and arrangement of fibers, the tensile and compressive strength values as well as the depth of water penetration under pressure were analyzed. Based on the tests performed, the best mechanical properties were achieved with the use of "Dramix 3D" steel fibers.",
journal = "International Scientific Conference SINARG 2023, organized by the Faculty of Civil Engineering and Architecture, University of Niš, and Serbian Academy of Sciences and Arts, Local Branch in Niš, Proceedings",
title = "Influence of different types of fibers on properties of concrete",
pages = "1072-1066",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_rims_578"
}
Stojanović, M., Antić Aranđelović, L., Janković, K., Bojović, D.,& Flajs, Ž.. (2023). Influence of different types of fibers on properties of concrete. in International Scientific Conference SINARG 2023, organized by the Faculty of Civil Engineering and Architecture, University of Niš, and Serbian Academy of Sciences and Arts, Local Branch in Niš, Proceedings, 2, 1066-1072.
https://hdl.handle.net/21.15107/rcub_rims_578
Stojanović M, Antić Aranđelović L, Janković K, Bojović D, Flajs Ž. Influence of different types of fibers on properties of concrete. in International Scientific Conference SINARG 2023, organized by the Faculty of Civil Engineering and Architecture, University of Niš, and Serbian Academy of Sciences and Arts, Local Branch in Niš, Proceedings. 2023;2:1066-1072.
https://hdl.handle.net/21.15107/rcub_rims_578 .
Stojanović, Marko, Antić Aranđelović, Lana, Janković, Ksenija, Bojović, Dragan, Flajs, Željko, "Influence of different types of fibers on properties of concrete" in International Scientific Conference SINARG 2023, organized by the Faculty of Civil Engineering and Architecture, University of Niš, and Serbian Academy of Sciences and Arts, Local Branch in Niš, Proceedings, 2 (2023):1066-1072,
https://hdl.handle.net/21.15107/rcub_rims_578 .

Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement

Janković, Ksenija; Stanković, Srboljub; Bojović, Dragan; Stojanović, Marko; Antić Aranđelović, Lana; Terzić, Anja

(2023)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stanković, Srboljub
AU  - Bojović, Dragan
AU  - Stojanović, Marko
AU  - Antić Aranđelović, Lana
AU  - Terzić, Anja
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/575
AB  - The impacts of nano-silica addition, steel micro-reinforcement, and aggregate type on the mechanical properties and durability of ultra-high-performance concrete (UHPC) were studied. As aggregates, quartz and barite were used. The amounts of steel fibers and nano-silica were alternated. Six concrete mixes were produced with quartz sand, and the remaining six concrete mixes were designed with barite sand. Fibers made about 3-5% of the concrete composition’s mass. In a 2-5% concentration, nano-silica was used as a cement replacement. The inclusion of nano-silica significantly boosted the compressive strength of UHPC. The compressive and flexural strengths were also positively impacted by fiber supplementation ranging from 3% to 5%. The amount of fiber utilized proved to be more influential than the aggregate used. The UHPC concrete's durability was increased as all samples were highly resistant to freezing and thawing cycles. UHPC designed with barite aggregate demonstrated good X and gamma ray absorption at energies below 300 keV.
C3  - Serbian Ceramic Society Conference “Advanced Ceramic and Application XI – New frontiers in multifunctional material science and processing”, Book of Abstracts, Belgrade, Serbia
T1  - Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement
SP  - 83
UR  - https://hdl.handle.net/21.15107/rcub_rims_575
ER  - 
@conference{
author = "Janković, Ksenija and Stanković, Srboljub and Bojović, Dragan and Stojanović, Marko and Antić Aranđelović, Lana and Terzić, Anja",
year = "2023",
abstract = "The impacts of nano-silica addition, steel micro-reinforcement, and aggregate type on the mechanical properties and durability of ultra-high-performance concrete (UHPC) were studied. As aggregates, quartz and barite were used. The amounts of steel fibers and nano-silica were alternated. Six concrete mixes were produced with quartz sand, and the remaining six concrete mixes were designed with barite sand. Fibers made about 3-5% of the concrete composition’s mass. In a 2-5% concentration, nano-silica was used as a cement replacement. The inclusion of nano-silica significantly boosted the compressive strength of UHPC. The compressive and flexural strengths were also positively impacted by fiber supplementation ranging from 3% to 5%. The amount of fiber utilized proved to be more influential than the aggregate used. The UHPC concrete's durability was increased as all samples were highly resistant to freezing and thawing cycles. UHPC designed with barite aggregate demonstrated good X and gamma ray absorption at energies below 300 keV.",
journal = "Serbian Ceramic Society Conference “Advanced Ceramic and Application XI – New frontiers in multifunctional material science and processing”, Book of Abstracts, Belgrade, Serbia",
title = "Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement",
pages = "83",
url = "https://hdl.handle.net/21.15107/rcub_rims_575"
}
Janković, K., Stanković, S., Bojović, D., Stojanović, M., Antić Aranđelović, L.,& Terzić, A.. (2023). Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement. in Serbian Ceramic Society Conference “Advanced Ceramic and Application XI – New frontiers in multifunctional material science and processing”, Book of Abstracts, Belgrade, Serbia, 83.
https://hdl.handle.net/21.15107/rcub_rims_575
Janković K, Stanković S, Bojović D, Stojanović M, Antić Aranđelović L, Terzić A. Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement. in Serbian Ceramic Society Conference “Advanced Ceramic and Application XI – New frontiers in multifunctional material science and processing”, Book of Abstracts, Belgrade, Serbia. 2023;:83.
https://hdl.handle.net/21.15107/rcub_rims_575 .
Janković, Ksenija, Stanković, Srboljub, Bojović, Dragan, Stojanović, Marko, Antić Aranđelović, Lana, Terzić, Anja, "Heavyweight Ultra-High-Performance Concrete with Micro-Reinforcement" in Serbian Ceramic Society Conference “Advanced Ceramic and Application XI – New frontiers in multifunctional material science and processing”, Book of Abstracts, Belgrade, Serbia (2023):83,
https://hdl.handle.net/21.15107/rcub_rims_575 .

Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel

Janković, Ksenija; Stanković, Srboljub; Terzić, Anja; Stojanović, Marko; Bojović, Dragan

(2023)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stanković, Srboljub
AU  - Terzić, Anja
AU  - Stojanović, Marko
AU  - Bojović, Dragan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/559
AB  - During the implementation of procedures for designing building barriers for protection against gamma and X radiation, the unavoidable question of choosing construction materials with appropriate mechanical and radiation characteristics for protective barriers arises. Based on engineering practice, it is necessary to compare different types of concrete used for the construction of facilities where there are sources of gamma and X radiation, such as in cases where radiation sources appear in medical facilities with linear accelerators, cyclotron installations for accelerating nuclear particles, in the environment of nuclear reactors, in radioactive waste storages, or in radiation sterilization unit s. In the cost-benefit analysis, several criteria are used to evaluate the characteristics of the concrete, so that in addition to the mechanical characteristics, the radiation characteristics of the construction material are also considered. One of the most important characteristics of concrete for radiation protection is its total mass attenuation coefficient. In this paper, computer code XCOM was used for the calculation of the total mass attenuation coefficients in energy range from 0.01MeV to 100 MeV for three types of concrete: ordinary concrete, concrete with barite and concrete with limonite and steel. Based on the comparison of calculation results, it was concluded that concrete with limonite and steel has greater protective power than other two concrete types for the gamma and X radiation energy less than 30 keV. The second important conclusion is that the concrete with barite has greater protective power than other two concrete types in the range of photon energy from 30 keV to 300 keV, and for photon energy greater than 6 MeV. A detailed analysis of the calculation results found that in the energy range of 400 keV to 6 MeV values for the total mass attenuation coefficients are approximately the same for three different types of concrete.
C3  - RAP 2023 International Conference on Radiation Applications, Book of Abstracts
T1  - Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel
SP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_rims_559
ER  - 
@conference{
author = "Janković, Ksenija and Stanković, Srboljub and Terzić, Anja and Stojanović, Marko and Bojović, Dragan",
year = "2023",
abstract = "During the implementation of procedures for designing building barriers for protection against gamma and X radiation, the unavoidable question of choosing construction materials with appropriate mechanical and radiation characteristics for protective barriers arises. Based on engineering practice, it is necessary to compare different types of concrete used for the construction of facilities where there are sources of gamma and X radiation, such as in cases where radiation sources appear in medical facilities with linear accelerators, cyclotron installations for accelerating nuclear particles, in the environment of nuclear reactors, in radioactive waste storages, or in radiation sterilization unit s. In the cost-benefit analysis, several criteria are used to evaluate the characteristics of the concrete, so that in addition to the mechanical characteristics, the radiation characteristics of the construction material are also considered. One of the most important characteristics of concrete for radiation protection is its total mass attenuation coefficient. In this paper, computer code XCOM was used for the calculation of the total mass attenuation coefficients in energy range from 0.01MeV to 100 MeV for three types of concrete: ordinary concrete, concrete with barite and concrete with limonite and steel. Based on the comparison of calculation results, it was concluded that concrete with limonite and steel has greater protective power than other two concrete types for the gamma and X radiation energy less than 30 keV. The second important conclusion is that the concrete with barite has greater protective power than other two concrete types in the range of photon energy from 30 keV to 300 keV, and for photon energy greater than 6 MeV. A detailed analysis of the calculation results found that in the energy range of 400 keV to 6 MeV values for the total mass attenuation coefficients are approximately the same for three different types of concrete.",
journal = "RAP 2023 International Conference on Radiation Applications, Book of Abstracts",
title = "Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel",
pages = "64",
url = "https://hdl.handle.net/21.15107/rcub_rims_559"
}
Janković, K., Stanković, S., Terzić, A., Stojanović, M.,& Bojović, D.. (2023). Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel. in RAP 2023 International Conference on Radiation Applications, Book of Abstracts, 64.
https://hdl.handle.net/21.15107/rcub_rims_559
Janković K, Stanković S, Terzić A, Stojanović M, Bojović D. Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel. in RAP 2023 International Conference on Radiation Applications, Book of Abstracts. 2023;:64.
https://hdl.handle.net/21.15107/rcub_rims_559 .
Janković, Ksenija, Stanković, Srboljub, Terzić, Anja, Stojanović, Marko, Bojović, Dragan, "Comparison of gamma and X radiation attentuation characteristics for ordinary concrete with barite and concrete with limonite and steel" in RAP 2023 International Conference on Radiation Applications, Book of Abstracts (2023):64,
https://hdl.handle.net/21.15107/rcub_rims_559 .

Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel

Janković, Ksenija; Stanković, Srboljub; Terzić, Anja; Bojović, Dragan; Stojanović, Marko

(2023)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stanković, Srboljub
AU  - Terzić, Anja
AU  - Bojović, Dragan
AU  - Stojanović, Marko
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/558
AB  - During the implementation of construction barrier design procedures for protection against gamma and X radiation, the inevitable question arises of choosing building materials with suitable mechanical and radiation characteristics for protective barriers. Based on engineering practice, it is necessary to compare different types of concrete used for the construction of buildings in which there are sources of gamma and X radiation, as in cases where radiation sources appear in medical institutions with linear accelerators, cyclotron installations for the acceleration of nuclear particles, in the environment of nuclear reactors, in radioactive waste warehouses or in radiation sterilization units. In the analysis of costs and benefits, several criteria are used to evaluate the characteristics of concrete, so that, in addition to the mechanical ones, the radiation characteristics of the building material are also taken into account. One of the most important characteristics of radiation shielding concrete is its overall mass attenuation coefficient. In this paper, the XCOM computer code was used to calculate the total mass attenuation coefficients in the energy range from 0.01 MeV to 100 MeV for three types of concrete: ultrahight properties concrete (UHPC), concrete with barite and concrete with magnetite and steel. Based on the comparison of the calculation results, it was concluded that concrete with magnetite and steel has a greater protective power than the other two types of concrete for gamma and X radiation energy lower than 30 keV. Another important conclusion is that concrete with barite has a higher protective power than the other two types of concrete in the photon energy range from 30 keV to 300 keV, and for photon energy greater than 6 MeV. A detailed analysis of the calculation results revealed that in the energy range from 400 keV to 6 MeV the values for the total mass attenuation coefficients are approximately the same for three different types of concrete.
C3  - Eleventh International Conference on Radiation, Natural Sciences, Medicine, Engineering, Technology and Ecology, Book of Abstracts
T1  - Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel
SP  - 239
DO  - 10.21175/rad.abstr.book.2023.36.19
ER  - 
@conference{
author = "Janković, Ksenija and Stanković, Srboljub and Terzić, Anja and Bojović, Dragan and Stojanović, Marko",
year = "2023",
abstract = "During the implementation of construction barrier design procedures for protection against gamma and X radiation, the inevitable question arises of choosing building materials with suitable mechanical and radiation characteristics for protective barriers. Based on engineering practice, it is necessary to compare different types of concrete used for the construction of buildings in which there are sources of gamma and X radiation, as in cases where radiation sources appear in medical institutions with linear accelerators, cyclotron installations for the acceleration of nuclear particles, in the environment of nuclear reactors, in radioactive waste warehouses or in radiation sterilization units. In the analysis of costs and benefits, several criteria are used to evaluate the characteristics of concrete, so that, in addition to the mechanical ones, the radiation characteristics of the building material are also taken into account. One of the most important characteristics of radiation shielding concrete is its overall mass attenuation coefficient. In this paper, the XCOM computer code was used to calculate the total mass attenuation coefficients in the energy range from 0.01 MeV to 100 MeV for three types of concrete: ultrahight properties concrete (UHPC), concrete with barite and concrete with magnetite and steel. Based on the comparison of the calculation results, it was concluded that concrete with magnetite and steel has a greater protective power than the other two types of concrete for gamma and X radiation energy lower than 30 keV. Another important conclusion is that concrete with barite has a higher protective power than the other two types of concrete in the photon energy range from 30 keV to 300 keV, and for photon energy greater than 6 MeV. A detailed analysis of the calculation results revealed that in the energy range from 400 keV to 6 MeV the values for the total mass attenuation coefficients are approximately the same for three different types of concrete.",
journal = "Eleventh International Conference on Radiation, Natural Sciences, Medicine, Engineering, Technology and Ecology, Book of Abstracts",
title = "Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel",
pages = "239",
doi = "10.21175/rad.abstr.book.2023.36.19"
}
Janković, K., Stanković, S., Terzić, A., Bojović, D.,& Stojanović, M.. (2023). Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel. in Eleventh International Conference on Radiation, Natural Sciences, Medicine, Engineering, Technology and Ecology, Book of Abstracts, 239.
https://doi.org/10.21175/rad.abstr.book.2023.36.19
Janković K, Stanković S, Terzić A, Bojović D, Stojanović M. Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel. in Eleventh International Conference on Radiation, Natural Sciences, Medicine, Engineering, Technology and Ecology, Book of Abstracts. 2023;:239.
doi:10.21175/rad.abstr.book.2023.36.19 .
Janković, Ksenija, Stanković, Srboljub, Terzić, Anja, Bojović, Dragan, Stojanović, Marko, "Gamma and X radiation attenuation characteristics for ultrahigh properties of concrete, concrete with barite and concrete with magnetite and steel" in Eleventh International Conference on Radiation, Natural Sciences, Medicine, Engineering, Technology and Ecology, Book of Abstracts (2023):239,
https://doi.org/10.21175/rad.abstr.book.2023.36.19 . .

Građevinski materijali i konstrukcije

Janković, Ksenija

(2023)

TY  - GEN
AU  - Janković, Ksenija
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/557
T2  - https://dimk.rs/en/members-editorial-board
T1  - Građevinski materijali i konstrukcije
UR  - https://hdl.handle.net/21.15107/rcub_rims_557
ER  - 
@misc{
author = "Janković, Ksenija",
year = "2023",
journal = "https://dimk.rs/en/members-editorial-board",
title = "Građevinski materijali i konstrukcije",
url = "https://hdl.handle.net/21.15107/rcub_rims_557"
}
Janković, K.. (2023). Građevinski materijali i konstrukcije. in https://dimk.rs/en/members-editorial-board.
https://hdl.handle.net/21.15107/rcub_rims_557
Janković K. Građevinski materijali i konstrukcije. in https://dimk.rs/en/members-editorial-board. 2023;.
https://hdl.handle.net/21.15107/rcub_rims_557 .
Janković, Ksenija, "Građevinski materijali i konstrukcije" in https://dimk.rs/en/members-editorial-board (2023),
https://hdl.handle.net/21.15107/rcub_rims_557 .

Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN

Bojović, Dragan; Terzić, Anja; Nikolić, Dragan; Janković, Ksenija

(2023)

TY  - JOUR
AU  - Bojović, Dragan
AU  - Terzić, Anja
AU  - Nikolić, Dragan
AU  - Janković, Ksenija
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/503
AB  - The experimental study included the design and production of ultra-high-performance steel fiber-reinforced concrete (UHPFRC). The physical and mechanical properties of UHPFRC were investigated in a laboratory setting. To investigate the properties of UHPFR concrete, three types of concrete and over 70 samples were used. Following that, samples were created to test the anchors' load-bearing performance. Six concrete slabs with a total of 108 pre-installed anchor samples and six concrete slabs with 108 post-installed chemical anchor samples were created. The analysis of the test findings comprised all individual results as well as the definition of the relationship between the anchor's tensile load capacity and other parameters. To accurately determine the individual influence of the investigated factors as well as their combined impact, a factorial experiment, and artificial neural networks were used in addition to normal statistical numerical studies. It was determined that both approaches offer advantages. The results obtained show matches in certain parts. Due to the way data is processed in different ways, there are also significant differences between them.
T2  - Science of Sintering 2023 OnLine-First Issue 00
T1  - Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN
DO  - 10.2298/SOS230420029B
ER  - 
@article{
author = "Bojović, Dragan and Terzić, Anja and Nikolić, Dragan and Janković, Ksenija",
year = "2023",
abstract = "The experimental study included the design and production of ultra-high-performance steel fiber-reinforced concrete (UHPFRC). The physical and mechanical properties of UHPFRC were investigated in a laboratory setting. To investigate the properties of UHPFR concrete, three types of concrete and over 70 samples were used. Following that, samples were created to test the anchors' load-bearing performance. Six concrete slabs with a total of 108 pre-installed anchor samples and six concrete slabs with 108 post-installed chemical anchor samples were created. The analysis of the test findings comprised all individual results as well as the definition of the relationship between the anchor's tensile load capacity and other parameters. To accurately determine the individual influence of the investigated factors as well as their combined impact, a factorial experiment, and artificial neural networks were used in addition to normal statistical numerical studies. It was determined that both approaches offer advantages. The results obtained show matches in certain parts. Due to the way data is processed in different ways, there are also significant differences between them.",
journal = "Science of Sintering 2023 OnLine-First Issue 00",
title = "Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN",
doi = "10.2298/SOS230420029B"
}
Bojović, D., Terzić, A., Nikolić, D.,& Janković, K.. (2023). Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN. in Science of Sintering 2023 OnLine-First Issue 00.
https://doi.org/10.2298/SOS230420029B
Bojović D, Terzić A, Nikolić D, Janković K. Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN. in Science of Sintering 2023 OnLine-First Issue 00. 2023;.
doi:10.2298/SOS230420029B .
Bojović, Dragan, Terzić, Anja, Nikolić, Dragan, Janković, Ksenija, "Determination of the effects of the rebar-cement bond parameters variation in UHPFRC using FA and ANN" in Science of Sintering 2023 OnLine-First Issue 00 (2023),
https://doi.org/10.2298/SOS230420029B . .

Application of coal combustion byproducts in self-compacting concrete: influence on flowability

Janković, Ksenija; Stojanović, Marko; Bojović, Dragan; Terzić, Anja; Stanković, Srboljub

(University of Belgrade, Technical Faculty in Bor, 2023)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stojanović, Marko
AU  - Bojović, Dragan
AU  - Terzić, Anja
AU  - Stanković, Srboljub
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/502
AB  - Compared to traditional concrete, self-compacting concrete (SCC) demonstrates greater flowability, which is achieved by including an extra high percentage of ultra-fine particles. As a result, the required high paste content is obtained while the cement content is strictly limited. The coal combustion byproduct (fly ash) is one of the most efficient SCC fillers because it extends the lifecycle of SCC by improving its microstructural properties, strength, and durability. In this study, the amounts of fly ash in SCC compositions varied. The changes in physical and mechanical characteristics of fresh SCC samples related to variations in the water/binder ratio were monitored.
PB  - University of Belgrade, Technical Faculty in Bor
C3  - XI International Mineral Processing & Recycling Conference – IMPRC Proceedings
T1  - Application of coal combustion byproducts in self-compacting concrete: influence on flowability
EP  - 584
SP  - 579
UR  - https://hdl.handle.net/21.15107/rcub_rims_502
ER  - 
@conference{
author = "Janković, Ksenija and Stojanović, Marko and Bojović, Dragan and Terzić, Anja and Stanković, Srboljub",
year = "2023",
abstract = "Compared to traditional concrete, self-compacting concrete (SCC) demonstrates greater flowability, which is achieved by including an extra high percentage of ultra-fine particles. As a result, the required high paste content is obtained while the cement content is strictly limited. The coal combustion byproduct (fly ash) is one of the most efficient SCC fillers because it extends the lifecycle of SCC by improving its microstructural properties, strength, and durability. In this study, the amounts of fly ash in SCC compositions varied. The changes in physical and mechanical characteristics of fresh SCC samples related to variations in the water/binder ratio were monitored.",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "XI International Mineral Processing & Recycling Conference – IMPRC Proceedings",
title = "Application of coal combustion byproducts in self-compacting concrete: influence on flowability",
pages = "584-579",
url = "https://hdl.handle.net/21.15107/rcub_rims_502"
}
Janković, K., Stojanović, M., Bojović, D., Terzić, A.,& Stanković, S.. (2023). Application of coal combustion byproducts in self-compacting concrete: influence on flowability. in XI International Mineral Processing & Recycling Conference – IMPRC Proceedings
University of Belgrade, Technical Faculty in Bor., 579-584.
https://hdl.handle.net/21.15107/rcub_rims_502
Janković K, Stojanović M, Bojović D, Terzić A, Stanković S. Application of coal combustion byproducts in self-compacting concrete: influence on flowability. in XI International Mineral Processing & Recycling Conference – IMPRC Proceedings. 2023;:579-584.
https://hdl.handle.net/21.15107/rcub_rims_502 .
Janković, Ksenija, Stojanović, Marko, Bojović, Dragan, Terzić, Anja, Stanković, Srboljub, "Application of coal combustion byproducts in self-compacting concrete: influence on flowability" in XI International Mineral Processing & Recycling Conference – IMPRC Proceedings (2023):579-584,
https://hdl.handle.net/21.15107/rcub_rims_502 .

Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija

Flajs, Željko; Janković, Ksenija; Stojanović, Marko; Bojović, Dragan

(2023)

TY  - JOUR
AU  - Flajs, Željko
AU  - Janković, Ksenija
AU  - Stojanović, Marko
AU  - Bojović, Dragan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/495
AB  - Ponašanje struktura pod delovanjem različitih vrsta opterećenja
određene su njenim deformacionim karakteristikama,
globalnim deformacionim karakteristikama – pomeranjima
i rotacijama i lokalnim deformacionim karakteristikama
- dilatacijama u materijalu strukture. Poznavanjem
globalnih i lokalnih deformacionih karakteristika strukture
ostvarujemo mogućnost da pratimo ponašanje strukture u
celini ili nekog njenog segmenta. Osnovni cilj ovog istraživanja
je provera algoritma proračuna za dobijanje vertikalnih
pomeranja - ugiba strukture, na osnovu poznatih vrednosti
dilatacija u materijalu strukture, pri delovanju opterećenja.
Provera algoritma sprovodi se poređenjem numeričkih i eksperimentalnih rezultata.
T2  - Integritet i vek konstrukcija, specijalno izdanje
T1  - Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija
EP  - 78
SP  - 73
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_rims_495
ER  - 
@article{
author = "Flajs, Željko and Janković, Ksenija and Stojanović, Marko and Bojović, Dragan",
year = "2023",
abstract = "Ponašanje struktura pod delovanjem različitih vrsta opterećenja
određene su njenim deformacionim karakteristikama,
globalnim deformacionim karakteristikama – pomeranjima
i rotacijama i lokalnim deformacionim karakteristikama
- dilatacijama u materijalu strukture. Poznavanjem
globalnih i lokalnih deformacionih karakteristika strukture
ostvarujemo mogućnost da pratimo ponašanje strukture u
celini ili nekog njenog segmenta. Osnovni cilj ovog istraživanja
je provera algoritma proračuna za dobijanje vertikalnih
pomeranja - ugiba strukture, na osnovu poznatih vrednosti
dilatacija u materijalu strukture, pri delovanju opterećenja.
Provera algoritma sprovodi se poređenjem numeričkih i eksperimentalnih rezultata.",
journal = "Integritet i vek konstrukcija, specijalno izdanje",
title = "Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija",
pages = "78-73",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_rims_495"
}
Flajs, Ž., Janković, K., Stojanović, M.,& Bojović, D.. (2023). Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija. in Integritet i vek konstrukcija, specijalno izdanje, 23, 73-78.
https://hdl.handle.net/21.15107/rcub_rims_495
Flajs Ž, Janković K, Stojanović M, Bojović D. Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija. in Integritet i vek konstrukcija, specijalno izdanje. 2023;23:73-78.
https://hdl.handle.net/21.15107/rcub_rims_495 .
Flajs, Željko, Janković, Ksenija, Stojanović, Marko, Bojović, Dragan, "Proračun ugiba grednih struktura na osnovu izmerenih vrednosti dilatacija" in Integritet i vek konstrukcija, specijalno izdanje, 23 (2023):73-78,
https://hdl.handle.net/21.15107/rcub_rims_495 .

Izbor komponentnih materijala za beton sa aspekta trajnosti

Janković, Ksenija; Bojović, Dragan; Stojanović, Marko

(2023)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Stojanović, Marko
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/489
AB  - Betonske konstrukcije su često u eksploataciji izložene spoljašnjim uticajima. Preporuke koje definiše evropski stan-dard SRPS EN 206 za korišćenje betona u pojedinim klasa-ma izloženosti nisu dovoljne i iz tog razloga je usvojen i standard SRPS U.M1.206 koji predstavlja nacionalni doda-tak za njegovu primenu. Dejstvo mraza značajno utiče na trajnost betonske konstrukcije jer može da dovede do raza-ranja strukture betona. Zaštita se postiže dodavanjem hemij-skih dodataka koji uvlače vazduh u svež beton. U radu je prikazana mogućnost primene novog dodatka Sika Aer Solid. Ispitivana je otpornost betona na dejstvo mraza, mraza u prisustvu soli za odmrzavanje, prodiranje vode pod pritiskom i koeficijent migracije hlorida u laboratorijskim uslovima i uzorcima izvađenim iz betonskih prefabrikovanih elemenata. Betoni sa Sika Aer Solid su za istu klasu konzistencije u odnosu na aerirane betone imali bolja svojstva i u svežem i u očvrslom stanju.
T2  - Integritet i vek konstrukcija
T1  - Izbor komponentnih materijala za beton sa aspekta trajnosti
EP  - 34
SP  - 25
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_rims_489
ER  - 
@article{
author = "Janković, Ksenija and Bojović, Dragan and Stojanović, Marko",
year = "2023",
abstract = "Betonske konstrukcije su često u eksploataciji izložene spoljašnjim uticajima. Preporuke koje definiše evropski stan-dard SRPS EN 206 za korišćenje betona u pojedinim klasa-ma izloženosti nisu dovoljne i iz tog razloga je usvojen i standard SRPS U.M1.206 koji predstavlja nacionalni doda-tak za njegovu primenu. Dejstvo mraza značajno utiče na trajnost betonske konstrukcije jer može da dovede do raza-ranja strukture betona. Zaštita se postiže dodavanjem hemij-skih dodataka koji uvlače vazduh u svež beton. U radu je prikazana mogućnost primene novog dodatka Sika Aer Solid. Ispitivana je otpornost betona na dejstvo mraza, mraza u prisustvu soli za odmrzavanje, prodiranje vode pod pritiskom i koeficijent migracije hlorida u laboratorijskim uslovima i uzorcima izvađenim iz betonskih prefabrikovanih elemenata. Betoni sa Sika Aer Solid su za istu klasu konzistencije u odnosu na aerirane betone imali bolja svojstva i u svežem i u očvrslom stanju.",
journal = "Integritet i vek konstrukcija",
title = "Izbor komponentnih materijala za beton sa aspekta trajnosti",
pages = "34-25",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_rims_489"
}
Janković, K., Bojović, D.,& Stojanović, M.. (2023). Izbor komponentnih materijala za beton sa aspekta trajnosti. in Integritet i vek konstrukcija, 23, 25-34.
https://hdl.handle.net/21.15107/rcub_rims_489
Janković K, Bojović D, Stojanović M. Izbor komponentnih materijala za beton sa aspekta trajnosti. in Integritet i vek konstrukcija. 2023;23:25-34.
https://hdl.handle.net/21.15107/rcub_rims_489 .
Janković, Ksenija, Bojović, Dragan, Stojanović, Marko, "Izbor komponentnih materijala za beton sa aspekta trajnosti" in Integritet i vek konstrukcija, 23 (2023):25-34,
https://hdl.handle.net/21.15107/rcub_rims_489 .

Grejna ploča za merenje toplotne provodljivosti građevinskih materijala

Ivanišević, Dragiša; Kijanović, Aleksandar; Mirković-Marjanović, Milica; Ilić, Snežana; Janković, Ksenija

(Institut IMS, 2022)

TY  - GEN
AU  - Ivanišević, Dragiša
AU  - Kijanović, Aleksandar
AU  - Mirković-Marjanović, Milica
AU  - Ilić, Snežana
AU  - Janković, Ksenija
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/554
AB  - Tehničko rešenje predstavlja poboljšanu konstrukciju zaštićene grejne ploče (hotguarded plate) za merenje toplotne provodljivosti termoizolacionih materijala
postavljanjem ispitnog uzorka iznad i ispod grejne ploče (standardna simetrična
ispitna konfiguracija). Merenje toplotne provodljivosti vrši se u skladu sa
standardom SRPS U.A2.020.
Ovim rešenjem toplotna provodljivost se proračunava na osnovu vrednosti
izmerenog toplotnog fluksa korišćenjem dva tanka toplotna fluksmetra na toploj
i hladnoj strani ispitivanih uzoraka. Prednost korišćenja fluksmetara na grejnoj i
rashladnoj ploči u odnosu na uobičajen metod za određivanje toplotne
provodljivosti (hot-guarded plate) je u periodu dostizanja stacionarnog stanja koji
je znatno kraći. Na taj način bi se ostvarila sva zahtevana merenja toplotne
provodljivsti termoizolacionih materijala usled povećane potražnje za ovakvom
vrstom ispitivanja u Republici Srbiji.
Kod metoda merenja sa toplotnim fluksmetrima, uobičajeno je da se koristi jedan
fluksmetar na zaštićenoj grejnoj ploči. Kod ovog tehničkog rešenja koriste se dva
toplotna fluksmetra na površini uzorka. Na taj način se precizno može utvrditi
srednja vrednost toplotnog fluksa kroz ispitivani uzorak tj. srednji toplotni fluks
kroz sam uzorak je tačnije određen. Fluksmetri za ovakvu vrstu merenja su
odabrani sa velikom mernom površinom da bi se dobile što merodavnije
vrednosti raspodele toplotnog fluksa po mernoj površi, pri čemu uobičajeno
korišćenje znatno manjih toplotnih fluksmetara.
Novi koncept grejne ploče ne odgovara uobičajenim grejnim pločama koje su
opisane u standardima. Specifičnost ovog dizajna ploče je u smanjenom
toplotnom prekidu – prostor između unutrašnje zaštićene (hot) i spoljašnje
zaštitne (guard) ploče koje zajedno čine predmet ovog tehničkog rešenja.
Veličinom toplotnog prekida od 1 mm popunjenog dvokomponentnim
termoizolacionim lepkom, određena je i minimalna dozvoljena debljina uzorka. 
Na taj način je omogućeno merenje tanjih termoizolacija, tj. povećan je merni
opseg samog uređaja pri ovakvom načinu izrade grejne ploče.
Dodatna prednost u pogledu konstrukcije toplotnog prekida je u formiranju
stepenika čija je osnovna svrha formiranje jednodelne konstrukcije koja se sastoji
od zaštićene (hot) i spoljašnje zaštitne (guard) ploče. Uobičajeno se ovakve ploče
izrađuju iz više segmenata dok je specifičnost ove konstrukcije da se sastoji iz
jednog dela.
Temperaturska razlika između dve ploče se kontroliše korišćenjem termoparova
u diferencijalnom spoju koji su raspoređeni po obimu kontakta dve ploče.
Merenjem naponskog signala za praćenje temperaturne razlike između pomenute
dve ploče mogu se proceniti lateralni gubici između zaštićene i zaštitne ploče i
izmereni naponski signal se može koristiti u svrhe upravljanja.
Grejači zaštićene i zaštitne ploče su ukopani u materijal grejne ploče i napravljeni
su korišćenjem žice za izradu termoparova K tipa. Grejači su vezani na standardni
priključak za termoparove tipa K, koji je fiksiran za grejnu ploču. Preko fiksiranih
priključaka ostvareno je napajanje grejača naponskim dvokanalnim nezavisnim
izvorom. Korišćene su rashladne ploče koje su hlađene korišćem automatzovanog
rashladnog kupatila sa propisanom površinskom fluktuacijom temperature
rashladne površi od 0,1°C.
Validacija grejne ploče je izvršena učešćem u međulaboratorijskom poređenju.
PB  - Institut IMS
T2  - Pregled naučnih i stručnih rezultata Instituta IMS u 2022. godini
T1  - Grejna ploča za merenje toplotne provodljivosti građevinskih materijala
UR  - https://hdl.handle.net/21.15107/rcub_rims_554
ER  - 
@misc{
author = "Ivanišević, Dragiša and Kijanović, Aleksandar and Mirković-Marjanović, Milica and Ilić, Snežana and Janković, Ksenija",
year = "2022",
abstract = "Tehničko rešenje predstavlja poboljšanu konstrukciju zaštićene grejne ploče (hotguarded plate) za merenje toplotne provodljivosti termoizolacionih materijala
postavljanjem ispitnog uzorka iznad i ispod grejne ploče (standardna simetrična
ispitna konfiguracija). Merenje toplotne provodljivosti vrši se u skladu sa
standardom SRPS U.A2.020.
Ovim rešenjem toplotna provodljivost se proračunava na osnovu vrednosti
izmerenog toplotnog fluksa korišćenjem dva tanka toplotna fluksmetra na toploj
i hladnoj strani ispitivanih uzoraka. Prednost korišćenja fluksmetara na grejnoj i
rashladnoj ploči u odnosu na uobičajen metod za određivanje toplotne
provodljivosti (hot-guarded plate) je u periodu dostizanja stacionarnog stanja koji
je znatno kraći. Na taj način bi se ostvarila sva zahtevana merenja toplotne
provodljivsti termoizolacionih materijala usled povećane potražnje za ovakvom
vrstom ispitivanja u Republici Srbiji.
Kod metoda merenja sa toplotnim fluksmetrima, uobičajeno je da se koristi jedan
fluksmetar na zaštićenoj grejnoj ploči. Kod ovog tehničkog rešenja koriste se dva
toplotna fluksmetra na površini uzorka. Na taj način se precizno može utvrditi
srednja vrednost toplotnog fluksa kroz ispitivani uzorak tj. srednji toplotni fluks
kroz sam uzorak je tačnije određen. Fluksmetri za ovakvu vrstu merenja su
odabrani sa velikom mernom površinom da bi se dobile što merodavnije
vrednosti raspodele toplotnog fluksa po mernoj površi, pri čemu uobičajeno
korišćenje znatno manjih toplotnih fluksmetara.
Novi koncept grejne ploče ne odgovara uobičajenim grejnim pločama koje su
opisane u standardima. Specifičnost ovog dizajna ploče je u smanjenom
toplotnom prekidu – prostor između unutrašnje zaštićene (hot) i spoljašnje
zaštitne (guard) ploče koje zajedno čine predmet ovog tehničkog rešenja.
Veličinom toplotnog prekida od 1 mm popunjenog dvokomponentnim
termoizolacionim lepkom, određena je i minimalna dozvoljena debljina uzorka. 
Na taj način je omogućeno merenje tanjih termoizolacija, tj. povećan je merni
opseg samog uređaja pri ovakvom načinu izrade grejne ploče.
Dodatna prednost u pogledu konstrukcije toplotnog prekida je u formiranju
stepenika čija je osnovna svrha formiranje jednodelne konstrukcije koja se sastoji
od zaštićene (hot) i spoljašnje zaštitne (guard) ploče. Uobičajeno se ovakve ploče
izrađuju iz više segmenata dok je specifičnost ove konstrukcije da se sastoji iz
jednog dela.
Temperaturska razlika između dve ploče se kontroliše korišćenjem termoparova
u diferencijalnom spoju koji su raspoređeni po obimu kontakta dve ploče.
Merenjem naponskog signala za praćenje temperaturne razlike između pomenute
dve ploče mogu se proceniti lateralni gubici između zaštićene i zaštitne ploče i
izmereni naponski signal se može koristiti u svrhe upravljanja.
Grejači zaštićene i zaštitne ploče su ukopani u materijal grejne ploče i napravljeni
su korišćenjem žice za izradu termoparova K tipa. Grejači su vezani na standardni
priključak za termoparove tipa K, koji je fiksiran za grejnu ploču. Preko fiksiranih
priključaka ostvareno je napajanje grejača naponskim dvokanalnim nezavisnim
izvorom. Korišćene su rashladne ploče koje su hlađene korišćem automatzovanog
rashladnog kupatila sa propisanom površinskom fluktuacijom temperature
rashladne površi od 0,1°C.
Validacija grejne ploče je izvršena učešćem u međulaboratorijskom poređenju.",
publisher = "Institut IMS",
journal = "Pregled naučnih i stručnih rezultata Instituta IMS u 2022. godini",
title = "Grejna ploča za merenje toplotne provodljivosti građevinskih materijala",
url = "https://hdl.handle.net/21.15107/rcub_rims_554"
}
Ivanišević, D., Kijanović, A., Mirković-Marjanović, M., Ilić, S.,& Janković, K.. (2022). Grejna ploča za merenje toplotne provodljivosti građevinskih materijala. in Pregled naučnih i stručnih rezultata Instituta IMS u 2022. godini
Institut IMS..
https://hdl.handle.net/21.15107/rcub_rims_554
Ivanišević D, Kijanović A, Mirković-Marjanović M, Ilić S, Janković K. Grejna ploča za merenje toplotne provodljivosti građevinskih materijala. in Pregled naučnih i stručnih rezultata Instituta IMS u 2022. godini. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_554 .
Ivanišević, Dragiša, Kijanović, Aleksandar, Mirković-Marjanović, Milica, Ilić, Snežana, Janković, Ksenija, "Grejna ploča za merenje toplotne provodljivosti građevinskih materijala" in Pregled naučnih i stručnih rezultata Instituta IMS u 2022. godini (2022),
https://hdl.handle.net/21.15107/rcub_rims_554 .

Verification and validation of an advanced guardedhot plate for determination of thermal conductivity

Mirković-Marjanović, Milica; Kijanović, Aleksandar; Ilić, Snežana; Janković, Ksenija; Zakić, Dimitrije

(2022)

TY  - JOUR
AU  - Mirković-Marjanović, Milica
AU  - Kijanović, Aleksandar
AU  - Ilić, Snežana
AU  - Janković, Ksenija
AU  - Zakić, Dimitrije
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/444
AB  - The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10℃-40℃. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the “z” score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.
T2  - Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747
T1  - Verification and validation of an advanced guardedhot plate for determination of thermal conductivity
EP  - 4747
SP  - 4735
VL  - 26
DO  - 10.2298/TSCI220311108M
ER  - 
@article{
author = "Mirković-Marjanović, Milica and Kijanović, Aleksandar and Ilić, Snežana and Janković, Ksenija and Zakić, Dimitrije",
year = "2022",
abstract = "The Guarded hot plate method (GHP) is a widely used technique to measure thermal conductivity of thermal insulation specimens in steady-state conditions. In this paper, an advance of GHP has been developed in the Laboratory for Thermal technique and fire protection in Institute IMS. The innovative GHP has been applied for measuring thermal conductivity using additional heat flux meters. The design of this GHP is similar to the design of the plate for GHP apparatus; however, it has different design: smaller width of thermal barrier, which is filled with insulation glue. Heaters inside hot and guard plates are built from wire for thermocouples, which is a unique type of heater. Geometry of heater has been optimized inside plates to achieve uniform temperature distribution along the specimen surface. Temperature uniformity of guarded hot plate and energy balance were experimentally determined. The verification and validation results of improved GHP have been shown. The test method was validated comparing test results of thermal conductivity with results of the round-robin test. Four national companies participated in the round-robin comparison on thermal conductivity measurement by guarded hot plate method. The measurement was performed on the same specimen of thermal insulation material (expanded polystyrene) according to SRPS EN 12667 at temperatures ranging between 10℃-40℃. The measured thermal conductivity of all participants in the round-robin test was input data for statistical processing according to SRPS ISO 5725-2 and ISO 13528. To evaluate the performance of the participants, the “z” score has been used. Measurements were conducted successively for all participants. Since 2020, the Accreditation Body of Serbia also approved this test method.",
journal = "Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747",
title = "Verification and validation of an advanced guardedhot plate for determination of thermal conductivity",
pages = "4747-4735",
volume = "26",
doi = "10.2298/TSCI220311108M"
}
Mirković-Marjanović, M., Kijanović, A., Ilić, S., Janković, K.,& Zakić, D.. (2022). Verification and validation of an advanced guardedhot plate for determination of thermal conductivity. in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747, 26, 4735-4747.
https://doi.org/10.2298/TSCI220311108M
Mirković-Marjanović M, Kijanović A, Ilić S, Janković K, Zakić D. Verification and validation of an advanced guardedhot plate for determination of thermal conductivity. in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747. 2022;26:4735-4747.
doi:10.2298/TSCI220311108M .
Mirković-Marjanović, Milica, Kijanović, Aleksandar, Ilić, Snežana, Janković, Ksenija, Zakić, Dimitrije, "Verification and validation of an advanced guardedhot plate for determination of thermal conductivity" in Thermal Science 2022 Volume 26, Issue 6 Part A, Pages: 4735-4747, 26 (2022):4735-4747,
https://doi.org/10.2298/TSCI220311108M . .

Influence of water/cement ratio on the properties of fresh SCC with fly ash addition

Janković, Ksenija; Stojanović, Marko; Bojović, Dragan; Terzić, Anja; Stanković, Srboljub

(2022)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stojanović, Marko
AU  - Bojović, Dragan
AU  - Terzić, Anja
AU  - Stanković, Srboljub
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/510
AB  - Self-compacting concrete (SCC) exhibits increased flowability in comparison with the conventional vibrated concrete. This is most often achieved through the incorporation of high amounts of extra-fine particles (i.e. mineral fillers) in the composition of self-compacting concrete. The purpose is to limit the share of cement while reaching the required large paste content. The components and their proportions, as well as type and particle size of filler, casting, manufacturing and curing conditions of SCC, significantly influence the concrete’s fresh and hardened properties. Among fillers employed in SCC, fly ash is one of the most frequent due to its availability and the low cost. Fly as is an industrial by-product and a highly efficient mineral additive whose role is reflected in improvements of microstructure packing, strength and durability of non-shaped composite building materials such as self-compacting concrete. A comparative study of performances of SCC with different quantities of fly ash and standard SCC with limestone filler was conducted in this study. The experimental program included the production of reference self-compacting concrete based on Portland cement and limestone filler (P1) and additional three experimental self-compacting concrete mixtures (P2, P3, P4) with different quantities of fly ash addition. Behaviour of self-compacting concrete in the fresh state is primarily influenced by type of mineral additive used. The effect that fly ash addition has on the physical behaviour and mechanical properties of fresh experimental SCC concrete samples was discussed. The properties and technology of self-compacting concretes in their fresh state in regard to the alternations in water/cement (w/c) ratios are monitored and explained in this paper. Concrete mixtures with fly ash had lower density in comparisons with the referent concrete. For the same class of consistency, higher amount of water was needed for preparation of SCC mixture with fly ash. Increasing w/c ratio induced more favourable properties of self-compacting concrete in its fresh state.
C3  - Proceeding of the 8th International Conference "Civil engineering-science and practice" -GNP 2022
T1  - Influence of water/cement ratio on the properties of fresh SCC with fly ash addition
UR  - https://hdl.handle.net/21.15107/rcub_rims_510
ER  - 
@conference{
author = "Janković, Ksenija and Stojanović, Marko and Bojović, Dragan and Terzić, Anja and Stanković, Srboljub",
year = "2022",
abstract = "Self-compacting concrete (SCC) exhibits increased flowability in comparison with the conventional vibrated concrete. This is most often achieved through the incorporation of high amounts of extra-fine particles (i.e. mineral fillers) in the composition of self-compacting concrete. The purpose is to limit the share of cement while reaching the required large paste content. The components and their proportions, as well as type and particle size of filler, casting, manufacturing and curing conditions of SCC, significantly influence the concrete’s fresh and hardened properties. Among fillers employed in SCC, fly ash is one of the most frequent due to its availability and the low cost. Fly as is an industrial by-product and a highly efficient mineral additive whose role is reflected in improvements of microstructure packing, strength and durability of non-shaped composite building materials such as self-compacting concrete. A comparative study of performances of SCC with different quantities of fly ash and standard SCC with limestone filler was conducted in this study. The experimental program included the production of reference self-compacting concrete based on Portland cement and limestone filler (P1) and additional three experimental self-compacting concrete mixtures (P2, P3, P4) with different quantities of fly ash addition. Behaviour of self-compacting concrete in the fresh state is primarily influenced by type of mineral additive used. The effect that fly ash addition has on the physical behaviour and mechanical properties of fresh experimental SCC concrete samples was discussed. The properties and technology of self-compacting concretes in their fresh state in regard to the alternations in water/cement (w/c) ratios are monitored and explained in this paper. Concrete mixtures with fly ash had lower density in comparisons with the referent concrete. For the same class of consistency, higher amount of water was needed for preparation of SCC mixture with fly ash. Increasing w/c ratio induced more favourable properties of self-compacting concrete in its fresh state.",
journal = "Proceeding of the 8th International Conference "Civil engineering-science and practice" -GNP 2022",
title = "Influence of water/cement ratio on the properties of fresh SCC with fly ash addition",
url = "https://hdl.handle.net/21.15107/rcub_rims_510"
}
Janković, K., Stojanović, M., Bojović, D., Terzić, A.,& Stanković, S.. (2022). Influence of water/cement ratio on the properties of fresh SCC with fly ash addition. in Proceeding of the 8th International Conference "Civil engineering-science and practice" -GNP 2022.
https://hdl.handle.net/21.15107/rcub_rims_510
Janković K, Stojanović M, Bojović D, Terzić A, Stanković S. Influence of water/cement ratio on the properties of fresh SCC with fly ash addition. in Proceeding of the 8th International Conference "Civil engineering-science and practice" -GNP 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_510 .
Janković, Ksenija, Stojanović, Marko, Bojović, Dragan, Terzić, Anja, Stanković, Srboljub, "Influence of water/cement ratio on the properties of fresh SCC with fly ash addition" in Proceeding of the 8th International Conference "Civil engineering-science and practice" -GNP 2022 (2022),
https://hdl.handle.net/21.15107/rcub_rims_510 .

Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete

Stojanović, Marko; Janković, Ksenija; Bojović, Dragan; Antić Aranđelović, Lana; Lončar, Ljiljana

(2022)

TY  - CONF
AU  - Stojanović, Marko
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Antić Aranđelović, Lana
AU  - Lončar, Ljiljana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/556
AB  - Concrete in which the air entraining admixture was used can exhibit behavior which alternate from the ‘standard’ concrete behavior when employed in the structural design. The origin of this problem can be found in the changeable properties of the componential materials, incompatibility of the utilized raw materials, influence of extreme conditions on the concrete curing (i.e., increased temperature), etc. The possibility of using other additives for the concrete exposed to various environmental influences was investigated. Sustainability of concrete production and resource efficiency urged the searching for an adequate waste material or an industrial byproduct which would improve freezing/thawing resistance of concrete. In this paper the possibility of Sika Aer Solid powdery additive and recycled rubber as a substitute for the air entraining admixture was investigated. Four mixtures were designed: referent concrete with no air entraining admixtures, concrete with Sika Aer Solid, concrete with recycled rubber, and concrete with air entraining admixture. The properties of fresh and hardened concrete were examined. The obtained results of compressive strength, resistance to freezing/thawing cycles and depth of water penetration under pressure for altered concretes indicate that it is possible to use alternative additives as substitutes for air entraining admixture.
C3  - Serbian Ceramic Society Conference - Advanced Ceramics and Applications X: New Frontiers in Multifunctional Material Science and Processing, Book of Abstracts
T1  - Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete
UR  - https://hdl.handle.net/21.15107/rcub_rims_556
ER  - 
@conference{
author = "Stojanović, Marko and Janković, Ksenija and Bojović, Dragan and Antić Aranđelović, Lana and Lončar, Ljiljana",
year = "2022",
abstract = "Concrete in which the air entraining admixture was used can exhibit behavior which alternate from the ‘standard’ concrete behavior when employed in the structural design. The origin of this problem can be found in the changeable properties of the componential materials, incompatibility of the utilized raw materials, influence of extreme conditions on the concrete curing (i.e., increased temperature), etc. The possibility of using other additives for the concrete exposed to various environmental influences was investigated. Sustainability of concrete production and resource efficiency urged the searching for an adequate waste material or an industrial byproduct which would improve freezing/thawing resistance of concrete. In this paper the possibility of Sika Aer Solid powdery additive and recycled rubber as a substitute for the air entraining admixture was investigated. Four mixtures were designed: referent concrete with no air entraining admixtures, concrete with Sika Aer Solid, concrete with recycled rubber, and concrete with air entraining admixture. The properties of fresh and hardened concrete were examined. The obtained results of compressive strength, resistance to freezing/thawing cycles and depth of water penetration under pressure for altered concretes indicate that it is possible to use alternative additives as substitutes for air entraining admixture.",
journal = "Serbian Ceramic Society Conference - Advanced Ceramics and Applications X: New Frontiers in Multifunctional Material Science and Processing, Book of Abstracts",
title = "Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete",
url = "https://hdl.handle.net/21.15107/rcub_rims_556"
}
Stojanović, M., Janković, K., Bojović, D., Antić Aranđelović, L.,& Lončar, L.. (2022). Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete. in Serbian Ceramic Society Conference - Advanced Ceramics and Applications X: New Frontiers in Multifunctional Material Science and Processing, Book of Abstracts.
https://hdl.handle.net/21.15107/rcub_rims_556
Stojanović M, Janković K, Bojović D, Antić Aranđelović L, Lončar L. Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete. in Serbian Ceramic Society Conference - Advanced Ceramics and Applications X: New Frontiers in Multifunctional Material Science and Processing, Book of Abstracts. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_556 .
Stojanović, Marko, Janković, Ksenija, Bojović, Dragan, Antić Aranđelović, Lana, Lončar, Ljiljana, "Possibility of Using Other Additives as Replacement for Air Entraining Admixture in Concrete" in Serbian Ceramic Society Conference - Advanced Ceramics and Applications X: New Frontiers in Multifunctional Material Science and Processing, Book of Abstracts (2022),
https://hdl.handle.net/21.15107/rcub_rims_556 .

Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID

Stojanović, Marko; Janković, Ksenija; Bojović, Dragan; Lončar, Ljiljana; Antić Aranđelović, Lana

(2022)

TY  - GEN
AU  - Stojanović, Marko
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
AU  - Antić Aranđelović, Lana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/553
AB  - Da bi se obezbedila trajnost betona, potrebno je zaštititi betonske infrastrukturne objekte u zemljama u kojima se smenjuju godišnja doba i različiti vremenski uslovi, jer je njihovo izlaganje ciklusima zamrzavanja i odmrzavanja (eng. FTC – freezing and thawing cycles) u prisustvu soli za odmrzavanje jedan od najagresivnijih mehanizama za propadanje betona. Šteta od mraza, progresivno pogoršanje koje započinje ljuštenjem površinskog maltera i završava potpunim urušavanjem betonskih elemenata, glavna je briga kada se beton koristi u hladnijim regionima. Ponavljanjem ciklusa zamrzavanja i odmrzavanja javljaju se prsline i pukotine, a beton postepeno gubi svoja prvobitno projektovana svojstva. Betoni koji će biti izloženi dejstvu mraza u svom sastavu imaju veće količine cementa, a problem primene veće količine cementa se poslednjih godina posebno naglašava zbog sve većeg zagađenja životne sredine i stvaranja efekta staklene bašte. Betoni koji se izlažu dejstvu mraza i/ili mraza i soli štite se aeriranjem. To često nije garancija da će se postići projektovan sadržaj vazduha u svežem betonu. Zbog toga se htelo doći do rešenja nekim drugim sredstvima zaštite betona izloženih dejstvu mraza. Jedno od rešenja je Sika Aer Solid. Kako bi ovaj materijal mogao da se primenjuje na našem podneblju i sa našim materijalima, obavljena su ispitivanja svojstava betona u svežem i očvrslom stanju, sa posebnom osvrtom na trajnost betona. Primenom Sika Aer Solid kao zamene za aerant, moguće je proizvesti betonske elemente čija svojstva zadovoljavaju zahtevane  klase izloženosti koje su definisane prema SRPS EN 206 i SRPS U.M1.206. Dodavanjem Sika Aer Solid u beton postiže se trajnost betonskih prefabrikovanih elemenata kroz postizanje otpornosti na dejstvo mraza, otpornosti na dejstvo mraza u prisustvu soli za odmrzavanje, otpornosti na penetraciju vode pod prisitkom, kao i otpornosti na migraciju hloridnih jona.
T1  - Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID
UR  - https://hdl.handle.net/21.15107/rcub_rims_553
ER  - 
@misc{
author = "Stojanović, Marko and Janković, Ksenija and Bojović, Dragan and Lončar, Ljiljana and Antić Aranđelović, Lana",
year = "2022",
abstract = "Da bi se obezbedila trajnost betona, potrebno je zaštititi betonske infrastrukturne objekte u zemljama u kojima se smenjuju godišnja doba i različiti vremenski uslovi, jer je njihovo izlaganje ciklusima zamrzavanja i odmrzavanja (eng. FTC – freezing and thawing cycles) u prisustvu soli za odmrzavanje jedan od najagresivnijih mehanizama za propadanje betona. Šteta od mraza, progresivno pogoršanje koje započinje ljuštenjem površinskog maltera i završava potpunim urušavanjem betonskih elemenata, glavna je briga kada se beton koristi u hladnijim regionima. Ponavljanjem ciklusa zamrzavanja i odmrzavanja javljaju se prsline i pukotine, a beton postepeno gubi svoja prvobitno projektovana svojstva. Betoni koji će biti izloženi dejstvu mraza u svom sastavu imaju veće količine cementa, a problem primene veće količine cementa se poslednjih godina posebno naglašava zbog sve većeg zagađenja životne sredine i stvaranja efekta staklene bašte. Betoni koji se izlažu dejstvu mraza i/ili mraza i soli štite se aeriranjem. To često nije garancija da će se postići projektovan sadržaj vazduha u svežem betonu. Zbog toga se htelo doći do rešenja nekim drugim sredstvima zaštite betona izloženih dejstvu mraza. Jedno od rešenja je Sika Aer Solid. Kako bi ovaj materijal mogao da se primenjuje na našem podneblju i sa našim materijalima, obavljena su ispitivanja svojstava betona u svežem i očvrslom stanju, sa posebnom osvrtom na trajnost betona. Primenom Sika Aer Solid kao zamene za aerant, moguće je proizvesti betonske elemente čija svojstva zadovoljavaju zahtevane  klase izloženosti koje su definisane prema SRPS EN 206 i SRPS U.M1.206. Dodavanjem Sika Aer Solid u beton postiže se trajnost betonskih prefabrikovanih elemenata kroz postizanje otpornosti na dejstvo mraza, otpornosti na dejstvo mraza u prisustvu soli za odmrzavanje, otpornosti na penetraciju vode pod prisitkom, kao i otpornosti na migraciju hloridnih jona.",
title = "Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID",
url = "https://hdl.handle.net/21.15107/rcub_rims_553"
}
Stojanović, M., Janković, K., Bojović, D., Lončar, L.,& Antić Aranđelović, L.. (2022). Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID. .
https://hdl.handle.net/21.15107/rcub_rims_553
Stojanović M, Janković K, Bojović D, Lončar L, Antić Aranđelović L. Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_553 .
Stojanović, Marko, Janković, Ksenija, Bojović, Dragan, Lončar, Ljiljana, Antić Aranđelović, Lana, "Poboljšanje svojstava prefabrikovanih betonskih elemenata primenom SIKA AER SOLID" (2022),
https://hdl.handle.net/21.15107/rcub_rims_553 .

Svojstva teškog SCC sa letećim pepelom

Janković, Ksenija; Stojanović, Marko; Bojović, Dragan; Terzić, Anja; Stanković, Srboljub

(2022)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stojanović, Marko
AU  - Bojović, Dragan
AU  - Terzić, Anja
AU  - Stanković, Srboljub
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/511
AB  - Leteći pepeo je visoko efikasan mineralni aditiv čija se uloga ogleda u poboljšanju mikrostrukture, čvrstoće i izdržljivosti kompozitnih građevinskih materijala kao što je samozbijajući beton (SCC). Referentni SCC je projktovan sa portland cementom, rečnim agregatom i krečnjačkim filerom. Eksperimentalni program obuhvatao je proizvodnju pet samozbijajućih betona sa različitim vrstama sitnog agregata, filera i specijalnog dodatka za povećanje otpornosti na dejstvo mraza. Ispitivani su i diskutovani efekti koje baritni pesak i dodaci imaju na svojstva svežeg SCC (sleganje rasprostiranjem, test V-levka i test L-kutije) i čvrstoću pri pritisku.
C3  - XXVIII Kongres DIMK i IX Kongres SIGP sa međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija – Zbornik radova
T1  - Svojstva teškog SCC sa letećim pepelom
EP  - 396
SP  - 389
UR  - https://hdl.handle.net/21.15107/rcub_rims_511
ER  - 
@conference{
author = "Janković, Ksenija and Stojanović, Marko and Bojović, Dragan and Terzić, Anja and Stanković, Srboljub",
year = "2022",
abstract = "Leteći pepeo je visoko efikasan mineralni aditiv čija se uloga ogleda u poboljšanju mikrostrukture, čvrstoće i izdržljivosti kompozitnih građevinskih materijala kao što je samozbijajući beton (SCC). Referentni SCC je projktovan sa portland cementom, rečnim agregatom i krečnjačkim filerom. Eksperimentalni program obuhvatao je proizvodnju pet samozbijajućih betona sa različitim vrstama sitnog agregata, filera i specijalnog dodatka za povećanje otpornosti na dejstvo mraza. Ispitivani su i diskutovani efekti koje baritni pesak i dodaci imaju na svojstva svežeg SCC (sleganje rasprostiranjem, test V-levka i test L-kutije) i čvrstoću pri pritisku.",
journal = "XXVIII Kongres DIMK i IX Kongres SIGP sa međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija – Zbornik radova",
title = "Svojstva teškog SCC sa letećim pepelom",
pages = "396-389",
url = "https://hdl.handle.net/21.15107/rcub_rims_511"
}
Janković, K., Stojanović, M., Bojović, D., Terzić, A.,& Stanković, S.. (2022). Svojstva teškog SCC sa letećim pepelom. in XXVIII Kongres DIMK i IX Kongres SIGP sa međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija – Zbornik radova, 389-396.
https://hdl.handle.net/21.15107/rcub_rims_511
Janković K, Stojanović M, Bojović D, Terzić A, Stanković S. Svojstva teškog SCC sa letećim pepelom. in XXVIII Kongres DIMK i IX Kongres SIGP sa međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija – Zbornik radova. 2022;:389-396.
https://hdl.handle.net/21.15107/rcub_rims_511 .
Janković, Ksenija, Stojanović, Marko, Bojović, Dragan, Terzić, Anja, Stanković, Srboljub, "Svojstva teškog SCC sa letećim pepelom" in XXVIII Kongres DIMK i IX Kongres SIGP sa međunarodnim simpozijumom o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija – Zbornik radova (2022):389-396,
https://hdl.handle.net/21.15107/rcub_rims_511 .

Impact of fine aggregate particle size and morphology on the early strengths of SCC

Janković, Ksenija; Stojanović, Marko; Terzić, Anja; Bojović, Dragan; Stanković, Srboljub

(2022)

TY  - CONF
AU  - Janković, Ksenija
AU  - Stojanović, Marko
AU  - Terzić, Anja
AU  - Bojović, Dragan
AU  - Stanković, Srboljub
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/508
AB  - A comparative study of performances of self compacting concrete (SCC) with fly ash and limestone filler was conducted. The experimental program included the production of reference SCC designed with Portland cement, river sand and limestone filler and four experimental self compacting concretes with different types of fine aggregates, fillers and special additive to increase freeze-thaw resistance. The effects that different sand and additions have on the properties of fresh SCC (slump-flow test, V-funnel test, and L-box test) and compressive strengths in early ages (3 and 7 days) were investigated and discussed.
C3  - International Congress Proceedings / Association of Structural Engineers of Serbia, 16. Congress, Aranđelovac, Serbia
T1  - Impact of fine aggregate particle size and morphology on the early strengths of SCC
EP  - 429
SP  - 422
UR  - https://hdl.handle.net/21.15107/rcub_rims_508
ER  - 
@conference{
author = "Janković, Ksenija and Stojanović, Marko and Terzić, Anja and Bojović, Dragan and Stanković, Srboljub",
year = "2022",
abstract = "A comparative study of performances of self compacting concrete (SCC) with fly ash and limestone filler was conducted. The experimental program included the production of reference SCC designed with Portland cement, river sand and limestone filler and four experimental self compacting concretes with different types of fine aggregates, fillers and special additive to increase freeze-thaw resistance. The effects that different sand and additions have on the properties of fresh SCC (slump-flow test, V-funnel test, and L-box test) and compressive strengths in early ages (3 and 7 days) were investigated and discussed.",
journal = "International Congress Proceedings / Association of Structural Engineers of Serbia, 16. Congress, Aranđelovac, Serbia",
title = "Impact of fine aggregate particle size and morphology on the early strengths of SCC",
pages = "429-422",
url = "https://hdl.handle.net/21.15107/rcub_rims_508"
}
Janković, K., Stojanović, M., Terzić, A., Bojović, D.,& Stanković, S.. (2022). Impact of fine aggregate particle size and morphology on the early strengths of SCC. in International Congress Proceedings / Association of Structural Engineers of Serbia, 16. Congress, Aranđelovac, Serbia, 422-429.
https://hdl.handle.net/21.15107/rcub_rims_508
Janković K, Stojanović M, Terzić A, Bojović D, Stanković S. Impact of fine aggregate particle size and morphology on the early strengths of SCC. in International Congress Proceedings / Association of Structural Engineers of Serbia, 16. Congress, Aranđelovac, Serbia. 2022;:422-429.
https://hdl.handle.net/21.15107/rcub_rims_508 .
Janković, Ksenija, Stojanović, Marko, Terzić, Anja, Bojović, Dragan, Stanković, Srboljub, "Impact of fine aggregate particle size and morphology on the early strengths of SCC" in International Congress Proceedings / Association of Structural Engineers of Serbia, 16. Congress, Aranđelovac, Serbia (2022):422-429,
https://hdl.handle.net/21.15107/rcub_rims_508 .

Influence of different types of fibers on flexural tensile strength

Stojanović, Marko; Antić Aranđelović, Lana; Janković, Ksenija; Bojović, Dragan; Lončar, Ljiljana

(2022)

TY  - CONF
AU  - Stojanović, Marko
AU  - Antić Aranđelović, Lana
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/507
AB  - The paper presents the influence of the application of different types of fibers in
concrete beams on the flexural tensile strength. All concrete beams were made of
the same component materials and composition, except for the amount of fiber,
which is varied. After hardening, the height of the concrete beams in the central
part was reduced to 125 mm by cutting. The measurement of flexural tensile
strength by was performed according to SRPS EN 14651. Based on the test
results, depending on the type, shape, quantity and distribution of fibers, the
values of ultimate and residual strengths were analyzed.
C3  - Proceedings of the ASES International Symposium, Aranđelovac, Serbia
T1  - Influence of different types of fibers on flexural tensile strength
EP  - 439
SP  - 439
UR  - https://hdl.handle.net/21.15107/rcub_rims_507
ER  - 
@conference{
author = "Stojanović, Marko and Antić Aranđelović, Lana and Janković, Ksenija and Bojović, Dragan and Lončar, Ljiljana",
year = "2022",
abstract = "The paper presents the influence of the application of different types of fibers in
concrete beams on the flexural tensile strength. All concrete beams were made of
the same component materials and composition, except for the amount of fiber,
which is varied. After hardening, the height of the concrete beams in the central
part was reduced to 125 mm by cutting. The measurement of flexural tensile
strength by was performed according to SRPS EN 14651. Based on the test
results, depending on the type, shape, quantity and distribution of fibers, the
values of ultimate and residual strengths were analyzed.",
journal = "Proceedings of the ASES International Symposium, Aranđelovac, Serbia",
title = "Influence of different types of fibers on flexural tensile strength",
pages = "439-439",
url = "https://hdl.handle.net/21.15107/rcub_rims_507"
}
Stojanović, M., Antić Aranđelović, L., Janković, K., Bojović, D.,& Lončar, L.. (2022). Influence of different types of fibers on flexural tensile strength. in Proceedings of the ASES International Symposium, Aranđelovac, Serbia, 439-439.
https://hdl.handle.net/21.15107/rcub_rims_507
Stojanović M, Antić Aranđelović L, Janković K, Bojović D, Lončar L. Influence of different types of fibers on flexural tensile strength. in Proceedings of the ASES International Symposium, Aranđelovac, Serbia. 2022;:439-439.
https://hdl.handle.net/21.15107/rcub_rims_507 .
Stojanović, Marko, Antić Aranđelović, Lana, Janković, Ksenija, Bojović, Dragan, Lončar, Ljiljana, "Influence of different types of fibers on flexural tensile strength" in Proceedings of the ASES International Symposium, Aranđelovac, Serbia (2022):439-439,
https://hdl.handle.net/21.15107/rcub_rims_507 .

Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures

Đoković, Ksenija; Tosović, Simo; Janković, Ksenija; Šušić, Nenad

(Univ Osijek, Tech Fac, Slavonski Brod, 2019)

TY  - JOUR
AU  - Đoković, Ksenija
AU  - Tosović, Simo
AU  - Janković, Ksenija
AU  - Šušić, Nenad
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/368
AB  - The paper presents and analyzes the results of testing the properties of cement stabilized mixtures of reclaimed asphalt pavement (RAP) and crushed stone aggregate (CSA). Tests were carried out on reclaimed asphalt pavement and crushed stone aggregate mixtures with varying RAP content (0%, 20%, 40%, 60% and 80%), as well as with a varying addition of cement (3%, 5% and 7%). The purpose of these tests was to determine the optimal proportion of recycled asphalt pavement in a mixture with crushed stone aggregate, and the optimal addition of cement as a hydraulic binder. Furthermore, the aim was to determine physical-mechanical parameters: the indirect tensile strength (R-t) and the dynamic modulus of elasticity (E), which are applied in pavement design during the process of cold recycling. On the basis of the obtained values, categorization of the stabilized mixture was carried out according to the standard EN 14227-10: 2006, which continues to be applied in the design of pavements. The maximum proportion of recycled asphalt in the stabilized mixture was determined as being up to 60%; the stabilized mixture was categorized into the "T1" and "T2" categories - gravelly soils.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički Vjesnik-Technical Gazette
T1  - Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures
EP  - 390
IS  - 2
SP  - 385
VL  - 26
DO  - 10.17559/TV-20180309114804
ER  - 
@article{
author = "Đoković, Ksenija and Tosović, Simo and Janković, Ksenija and Šušić, Nenad",
year = "2019",
abstract = "The paper presents and analyzes the results of testing the properties of cement stabilized mixtures of reclaimed asphalt pavement (RAP) and crushed stone aggregate (CSA). Tests were carried out on reclaimed asphalt pavement and crushed stone aggregate mixtures with varying RAP content (0%, 20%, 40%, 60% and 80%), as well as with a varying addition of cement (3%, 5% and 7%). The purpose of these tests was to determine the optimal proportion of recycled asphalt pavement in a mixture with crushed stone aggregate, and the optimal addition of cement as a hydraulic binder. Furthermore, the aim was to determine physical-mechanical parameters: the indirect tensile strength (R-t) and the dynamic modulus of elasticity (E), which are applied in pavement design during the process of cold recycling. On the basis of the obtained values, categorization of the stabilized mixture was carried out according to the standard EN 14227-10: 2006, which continues to be applied in the design of pavements. The maximum proportion of recycled asphalt in the stabilized mixture was determined as being up to 60%; the stabilized mixture was categorized into the "T1" and "T2" categories - gravelly soils.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički Vjesnik-Technical Gazette",
title = "Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures",
pages = "390-385",
number = "2",
volume = "26",
doi = "10.17559/TV-20180309114804"
}
Đoković, K., Tosović, S., Janković, K.,& Šušić, N.. (2019). Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures. in Tehnički Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 26(2), 385-390.
https://doi.org/10.17559/TV-20180309114804
Đoković K, Tosović S, Janković K, Šušić N. Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures. in Tehnički Vjesnik-Technical Gazette. 2019;26(2):385-390.
doi:10.17559/TV-20180309114804 .
Đoković, Ksenija, Tosović, Simo, Janković, Ksenija, Šušić, Nenad, "Physical-Mechanical Properties of Cement Stabilized RAP/Crushed Stone Aggregate Mixtures" in Tehnički Vjesnik-Technical Gazette, 26, no. 2 (2019):385-390,
https://doi.org/10.17559/TV-20180309114804 . .
1
1
1

Influence of nanoparticles on the strength of ultra-high performance concrete

Janković, Ksenija; Bojović, Dragan; Stojanović, Marko

(Elsevier, 2018)

TY  - CHAP
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Stojanović, Marko
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/338
AB  - Ultra-high performance concrete (UHPC) is a modern composite material with extremely good mechanical characteristics. The application of nanoparticles in concrete is one of the possibilities for improving its properties. Nanoparticles such as nano-SiO2 (NS), nano-Al2O3 (NA), nano-TiO2 (NT), nano-Fe2O3 (NF), nano-ZnO2, nanoclay (NC), carbon nanotubes (CNT), and carbon nanofibers (CNF) can be used in cementitious materials. Nanomaterial in UHPC accelerates the hydration of cement, densifies the microstructure, improves strength, and thus contributes to its durability. Component materials and curing regimes significantly affect the properties of UHPC. For this reason, the influence of various supplementary cementitious materials such as metakaolin and fine ground fly ash and curing regimes (water, steam, and autoclave curing) on the properties of UHPC has been analyzed. The influence of nanosilica as the most frequently applied nanomaterial and the curing regimes on the strength of UHPC is studied. Nanomaterial dispersion and distribution have significant influence on the properties of cement-based materials. Techniques for better homogenization of nanoparticles are listed.
PB  - Elsevier
T2  - Nanotechnology in Eco-efficient Construction: Materials, Processes and Applications
T1  - Influence of nanoparticles on the strength of ultra-high performance concrete
EP  - 42
SP  - 13
DO  - 10.1016/B978-0-08-102641-0.00002-5
ER  - 
@inbook{
author = "Janković, Ksenija and Bojović, Dragan and Stojanović, Marko",
year = "2018",
abstract = "Ultra-high performance concrete (UHPC) is a modern composite material with extremely good mechanical characteristics. The application of nanoparticles in concrete is one of the possibilities for improving its properties. Nanoparticles such as nano-SiO2 (NS), nano-Al2O3 (NA), nano-TiO2 (NT), nano-Fe2O3 (NF), nano-ZnO2, nanoclay (NC), carbon nanotubes (CNT), and carbon nanofibers (CNF) can be used in cementitious materials. Nanomaterial in UHPC accelerates the hydration of cement, densifies the microstructure, improves strength, and thus contributes to its durability. Component materials and curing regimes significantly affect the properties of UHPC. For this reason, the influence of various supplementary cementitious materials such as metakaolin and fine ground fly ash and curing regimes (water, steam, and autoclave curing) on the properties of UHPC has been analyzed. The influence of nanosilica as the most frequently applied nanomaterial and the curing regimes on the strength of UHPC is studied. Nanomaterial dispersion and distribution have significant influence on the properties of cement-based materials. Techniques for better homogenization of nanoparticles are listed.",
publisher = "Elsevier",
journal = "Nanotechnology in Eco-efficient Construction: Materials, Processes and Applications",
booktitle = "Influence of nanoparticles on the strength of ultra-high performance concrete",
pages = "42-13",
doi = "10.1016/B978-0-08-102641-0.00002-5"
}
Janković, K., Bojović, D.,& Stojanović, M.. (2018). Influence of nanoparticles on the strength of ultra-high performance concrete. in Nanotechnology in Eco-efficient Construction: Materials, Processes and Applications
Elsevier., 13-42.
https://doi.org/10.1016/B978-0-08-102641-0.00002-5
Janković K, Bojović D, Stojanović M. Influence of nanoparticles on the strength of ultra-high performance concrete. in Nanotechnology in Eco-efficient Construction: Materials, Processes and Applications. 2018;:13-42.
doi:10.1016/B978-0-08-102641-0.00002-5 .
Janković, Ksenija, Bojović, Dragan, Stojanović, Marko, "Influence of nanoparticles on the strength of ultra-high performance concrete" in Nanotechnology in Eco-efficient Construction: Materials, Processes and Applications (2018):13-42,
https://doi.org/10.1016/B978-0-08-102641-0.00002-5 . .
7
5

Possibility of using bottom ash in precast concrete products

Janković, Ksenija; Bojović, Dragan; Lončar, Ljiljana; Stojanović, Marko; Antić, Lana

(Croatian Soc Civil Engineers-Hsgi, Zagreb, 2018)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
AU  - Stojanović, Marko
AU  - Antić, Lana
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/330
AB  - Chemical, physical and mechanical properties of bottom ash from two thermal power plants were analysed in order to evaluate the quality of bottom ash and to determine the possibility of its use in composite materials. It was found that the bottom ash samples from both power plants show good properties enabling their practical use, and that they also meet most of the criteria specified for fly ash. Samples in which 4, 8, 12 and 16% of fine aggregate was replaced with bottom ash were tested. The results meet criteria of applicable regulations for concrete, which justifies the use of bottom ash in construction industry.
PB  - Croatian Soc Civil Engineers-Hsgi, Zagreb
T2  - Gradjevinar
T1  - Possibility of using bottom ash in precast concrete products
EP  - 419
IS  - 5
SP  - 413
VL  - 70
DO  - 10.14256/JCE.1589.2016
ER  - 
@article{
author = "Janković, Ksenija and Bojović, Dragan and Lončar, Ljiljana and Stojanović, Marko and Antić, Lana",
year = "2018",
abstract = "Chemical, physical and mechanical properties of bottom ash from two thermal power plants were analysed in order to evaluate the quality of bottom ash and to determine the possibility of its use in composite materials. It was found that the bottom ash samples from both power plants show good properties enabling their practical use, and that they also meet most of the criteria specified for fly ash. Samples in which 4, 8, 12 and 16% of fine aggregate was replaced with bottom ash were tested. The results meet criteria of applicable regulations for concrete, which justifies the use of bottom ash in construction industry.",
publisher = "Croatian Soc Civil Engineers-Hsgi, Zagreb",
journal = "Gradjevinar",
title = "Possibility of using bottom ash in precast concrete products",
pages = "419-413",
number = "5",
volume = "70",
doi = "10.14256/JCE.1589.2016"
}
Janković, K., Bojović, D., Lončar, L., Stojanović, M.,& Antić, L.. (2018). Possibility of using bottom ash in precast concrete products. in Gradjevinar
Croatian Soc Civil Engineers-Hsgi, Zagreb., 70(5), 413-419.
https://doi.org/10.14256/JCE.1589.2016
Janković K, Bojović D, Lončar L, Stojanović M, Antić L. Possibility of using bottom ash in precast concrete products. in Gradjevinar. 2018;70(5):413-419.
doi:10.14256/JCE.1589.2016 .
Janković, Ksenija, Bojović, Dragan, Lončar, Ljiljana, Stojanović, Marko, Antić, Lana, "Possibility of using bottom ash in precast concrete products" in Gradjevinar, 70, no. 5 (2018):413-419,
https://doi.org/10.14256/JCE.1589.2016 . .
3
2
4

Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse

Bojović, Dragan; Bašić, Nevena; Janković, Ksenija; Senić, Aleksandar

(Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd, 2018)

TY  - JOUR
AU  - Bojović, Dragan
AU  - Bašić, Nevena
AU  - Janković, Ksenija
AU  - Senić, Aleksandar
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/333
AB  - Čvrstoća pri pritisku jeste svojstvo koje je veoma značajno u građevinarstvu, te postoji izražena potreba da se razviju metode za praćenje prirasta čvrstoće pri pritisku betona u konstrukciji. Prema zakonskim propisima Republike Srbije, procena čvrstoće pri pritisku betona u konstrukciji radi se na osnovu rezultata dobijenih tokom laboratorijskih ispitivanja u konstantnim uslovima. U radu se koriste rezultati dobijeni u laboratoriji i porede se rezultati dobijeni pomoću metode za merenje zrelosti betona, koje se baziraju na korelaciji između čvrstoće betona, starosti betona i temperaturnih uslova i rezultata dobijenih pomoću ConReg 706 uređaja, koji takođe uzima u obzir temperaturu van betona. Primenjena su dva pristupa za određivanje zrelosti betona - Nurse & Saul i Arrhenius. Za potrebe ovog istaživanja, pripremljene su dve različite betonske mešavine - MB 35 i MB 40, obe klase C30/37. Odabrani konstrukcijski elementi betonirani su tokom leta, na mostu preko reke Save, kod Ostružnice, u blizini Beograda. Testirani elementi mosta jesu kolovozna ploča, naglavna greda i ležišna greda. Ispitivanje je pokazalo da temperatura koja se razvija u masivnim delovima konstrukcije znatno utiče na čvrstoću betona, pored već dobro poznatih faktora, kao što su vodo-cementni odnos, tip i kvalitet komponentnih materijala i drugi.
AB  - Compressive strength is a property of significant importance for civil engineering; consequently, there have been strong need for developing method, which will estimate rise of concrete compressive strength in construction. According to Serbian legislation, assessment of compressive strength in construction relies on laboratory results obtained under constant conditions. This paper presents and compares results obtained in laboratory, results obtained by maturity method, which is based on correlation between concrete compressive strength, concrete age and ambient temperature, and the results obtained by ConReg 706 instrument, which also takes in consideration external environment and concrete temperature. Two approaches of maturity method, Nurse & Saul and Arrhenius have been applied. For this research, concrete class C30/37 was used, prepared as two different mix designs, MB35 and MB 40. Casting was performed in summer time in Ostruznica bridge near Belgrade. Elements that were casted are deck slab, pile cup and bearing beam.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Građevinski materijali i konstrukcije
T1  - Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse
T1  - Assessment of concrete compressive strength using different maturity functions: Case study
EP  - 65
IS  - 3
SP  - 55
VL  - 61
DO  - 10.5937/GRMK1803055B
ER  - 
@article{
author = "Bojović, Dragan and Bašić, Nevena and Janković, Ksenija and Senić, Aleksandar",
year = "2018",
abstract = "Čvrstoća pri pritisku jeste svojstvo koje je veoma značajno u građevinarstvu, te postoji izražena potreba da se razviju metode za praćenje prirasta čvrstoće pri pritisku betona u konstrukciji. Prema zakonskim propisima Republike Srbije, procena čvrstoće pri pritisku betona u konstrukciji radi se na osnovu rezultata dobijenih tokom laboratorijskih ispitivanja u konstantnim uslovima. U radu se koriste rezultati dobijeni u laboratoriji i porede se rezultati dobijeni pomoću metode za merenje zrelosti betona, koje se baziraju na korelaciji između čvrstoće betona, starosti betona i temperaturnih uslova i rezultata dobijenih pomoću ConReg 706 uređaja, koji takođe uzima u obzir temperaturu van betona. Primenjena su dva pristupa za određivanje zrelosti betona - Nurse & Saul i Arrhenius. Za potrebe ovog istaživanja, pripremljene su dve različite betonske mešavine - MB 35 i MB 40, obe klase C30/37. Odabrani konstrukcijski elementi betonirani su tokom leta, na mostu preko reke Save, kod Ostružnice, u blizini Beograda. Testirani elementi mosta jesu kolovozna ploča, naglavna greda i ležišna greda. Ispitivanje je pokazalo da temperatura koja se razvija u masivnim delovima konstrukcije znatno utiče na čvrstoću betona, pored već dobro poznatih faktora, kao što su vodo-cementni odnos, tip i kvalitet komponentnih materijala i drugi., Compressive strength is a property of significant importance for civil engineering; consequently, there have been strong need for developing method, which will estimate rise of concrete compressive strength in construction. According to Serbian legislation, assessment of compressive strength in construction relies on laboratory results obtained under constant conditions. This paper presents and compares results obtained in laboratory, results obtained by maturity method, which is based on correlation between concrete compressive strength, concrete age and ambient temperature, and the results obtained by ConReg 706 instrument, which also takes in consideration external environment and concrete temperature. Two approaches of maturity method, Nurse & Saul and Arrhenius have been applied. For this research, concrete class C30/37 was used, prepared as two different mix designs, MB35 and MB 40. Casting was performed in summer time in Ostruznica bridge near Belgrade. Elements that were casted are deck slab, pile cup and bearing beam.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Građevinski materijali i konstrukcije",
title = "Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse, Assessment of concrete compressive strength using different maturity functions: Case study",
pages = "65-55",
number = "3",
volume = "61",
doi = "10.5937/GRMK1803055B"
}
Bojović, D., Bašić, N., Janković, K.,& Senić, A.. (2018). Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse. in Građevinski materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 61(3), 55-65.
https://doi.org/10.5937/GRMK1803055B
Bojović D, Bašić N, Janković K, Senić A. Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse. in Građevinski materijali i konstrukcije. 2018;61(3):55-65.
doi:10.5937/GRMK1803055B .
Bojović, Dragan, Bašić, Nevena, Janković, Ksenija, Senić, Aleksandar, "Procena čvrstoće betona pri pritisku, korišćenjem različitih funkcija zrelosti betona - primer iz prakse" in Građevinski materijali i konstrukcije, 61, no. 3 (2018):55-65,
https://doi.org/10.5937/GRMK1803055B . .
1
1

The influence of tailings and cement type on durability properties of self-compacting concrete

Janković, Ksenija; Šušić, Nenad; Stojanović, Marko; Bojović, Dragan; Lončar, Ljiljana

(Univ Osijek, Tech Fac, Slavonski Brod, 2017)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Šušić, Nenad
AU  - Stojanović, Marko
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/325
AB  - In order to examine the differences in chemical composition and the possibility of using mine tailings in mortar and concrete production, samples were taken from the landfill and directly from the production. Tailings test results showed no pozzolanic activity and that its application in concrete can be only a partial replacement of aggregate. This paper presents the possibility of using tailings in self-compacting concrete made with Portland cement and sulphate resistant cement. Concrete specimens in which the aggregate fraction 0/4 mm was replaced with 10 and 20 % of tailings were examined. The resistance to freezing and thawing with and without de-icing salts is used as an indicator of concrete durability.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - The influence of tailings and cement type on durability properties of self-compacting concrete
EP  - 962
IS  - 3
SP  - 957
VL  - 24
DO  - 10.17559/TV-20160304113800
ER  - 
@article{
author = "Janković, Ksenija and Šušić, Nenad and Stojanović, Marko and Bojović, Dragan and Lončar, Ljiljana",
year = "2017",
abstract = "In order to examine the differences in chemical composition and the possibility of using mine tailings in mortar and concrete production, samples were taken from the landfill and directly from the production. Tailings test results showed no pozzolanic activity and that its application in concrete can be only a partial replacement of aggregate. This paper presents the possibility of using tailings in self-compacting concrete made with Portland cement and sulphate resistant cement. Concrete specimens in which the aggregate fraction 0/4 mm was replaced with 10 and 20 % of tailings were examined. The resistance to freezing and thawing with and without de-icing salts is used as an indicator of concrete durability.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "The influence of tailings and cement type on durability properties of self-compacting concrete",
pages = "962-957",
number = "3",
volume = "24",
doi = "10.17559/TV-20160304113800"
}
Janković, K., Šušić, N., Stojanović, M., Bojović, D.,& Lončar, L.. (2017). The influence of tailings and cement type on durability properties of self-compacting concrete. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 24(3), 957-962.
https://doi.org/10.17559/TV-20160304113800
Janković K, Šušić N, Stojanović M, Bojović D, Lončar L. The influence of tailings and cement type on durability properties of self-compacting concrete. in Tehnicki Vjesnik-Technical Gazette. 2017;24(3):957-962.
doi:10.17559/TV-20160304113800 .
Janković, Ksenija, Šušić, Nenad, Stojanović, Marko, Bojović, Dragan, Lončar, Ljiljana, "The influence of tailings and cement type on durability properties of self-compacting concrete" in Tehnicki Vjesnik-Technical Gazette, 24, no. 3 (2017):957-962,
https://doi.org/10.17559/TV-20160304113800 . .
10
5
11

Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje

Bojović, Dragan; Aranđelović, Bojan; Janković, Ksenija; Senić, Aleksandar; Stojanović, Marko

(Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd, 2017)

TY  - JOUR
AU  - Bojović, Dragan
AU  - Aranđelović, Bojan
AU  - Janković, Ksenija
AU  - Senić, Aleksandar
AU  - Stojanović, Marko
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/316
AB  - Prednaprezanjem konstruktivnih elemenata omogućava se povećavanje raspona armiranobetonskih konstrukcija. Pri projektovanju i dimenzionisanju prednapregnutih armiranobetonskih konstrukcija, neophodno je poznavanje, odnosno usvajanje većeg broja parametara koji su empirijski određeni. Za prednapregnute konstrukcije od osnovnog je značaja da se odredi nivo sile naprezanja kablova. Nivo sile prednaprezanja, pored drugih parametara, umnogome zavisi od koeficijenta trenja kablova i koeficijenta imperfekcije izvođenja. Ovi koeficijenti definisani su standardima za projektovanje ili su ih definisali proizvođači sistema prednaprezanja. Koeficijenti su definisani u širokim opsezima, dok je za projektovanje neophodno poznavanje što tačnijih vrednosti, kako bi se dobio dobar projekat i jeftinija konstrukcija. Putem eksperimentalnog rada in-situ, određen je opseg vrednosti koeficijenta trenja kablova i upoređen je sa standardom definisanim opsezima.
AB  - Prestressing structural elements allows an increase in the spans of reinforced concrete structures. In the design and dimensioning of prestressed reinforced concrete structures it is necessary to know, that is to adopt a number of parameters which are empirically determined. Determining the level of the tension force of the cables is of primary importance for prestressed structures. The level of tensioning force, in addition to other parameters, greatly depends on the friction coefficient of cables and the imperfection coefficient of execution. These coefficients are defined by standards for the design or by the manufacturer of the prestressing system. The coefficients are defined in wide ranges, while for the design, the knowledge of the most accurate values is necessary in order to obtain a good design and cheaper structures. Through experimental work in-situ the range of the values of the coefficient of friction of cables is determined and compared with ranges defined by the standard.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Građevinski materijali i konstrukcije
T1  - Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje
T1  - Determination of the in situ coefficient of friction and imperfection of prestressing cables
EP  - 56
IS  - 2
SP  - 49
VL  - 60
DO  - 10.5937/grmk1702049B
ER  - 
@article{
author = "Bojović, Dragan and Aranđelović, Bojan and Janković, Ksenija and Senić, Aleksandar and Stojanović, Marko",
year = "2017",
abstract = "Prednaprezanjem konstruktivnih elemenata omogućava se povećavanje raspona armiranobetonskih konstrukcija. Pri projektovanju i dimenzionisanju prednapregnutih armiranobetonskih konstrukcija, neophodno je poznavanje, odnosno usvajanje većeg broja parametara koji su empirijski određeni. Za prednapregnute konstrukcije od osnovnog je značaja da se odredi nivo sile naprezanja kablova. Nivo sile prednaprezanja, pored drugih parametara, umnogome zavisi od koeficijenta trenja kablova i koeficijenta imperfekcije izvođenja. Ovi koeficijenti definisani su standardima za projektovanje ili su ih definisali proizvođači sistema prednaprezanja. Koeficijenti su definisani u širokim opsezima, dok je za projektovanje neophodno poznavanje što tačnijih vrednosti, kako bi se dobio dobar projekat i jeftinija konstrukcija. Putem eksperimentalnog rada in-situ, određen je opseg vrednosti koeficijenta trenja kablova i upoređen je sa standardom definisanim opsezima., Prestressing structural elements allows an increase in the spans of reinforced concrete structures. In the design and dimensioning of prestressed reinforced concrete structures it is necessary to know, that is to adopt a number of parameters which are empirically determined. Determining the level of the tension force of the cables is of primary importance for prestressed structures. The level of tensioning force, in addition to other parameters, greatly depends on the friction coefficient of cables and the imperfection coefficient of execution. These coefficients are defined by standards for the design or by the manufacturer of the prestressing system. The coefficients are defined in wide ranges, while for the design, the knowledge of the most accurate values is necessary in order to obtain a good design and cheaper structures. Through experimental work in-situ the range of the values of the coefficient of friction of cables is determined and compared with ranges defined by the standard.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Građevinski materijali i konstrukcije",
title = "Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje, Determination of the in situ coefficient of friction and imperfection of prestressing cables",
pages = "56-49",
number = "2",
volume = "60",
doi = "10.5937/grmk1702049B"
}
Bojović, D., Aranđelović, B., Janković, K., Senić, A.,& Stojanović, M.. (2017). Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje. in Građevinski materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 60(2), 49-56.
https://doi.org/10.5937/grmk1702049B
Bojović D, Aranđelović B, Janković K, Senić A, Stojanović M. Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje. in Građevinski materijali i konstrukcije. 2017;60(2):49-56.
doi:10.5937/grmk1702049B .
Bojović, Dragan, Aranđelović, Bojan, Janković, Ksenija, Senić, Aleksandar, Stojanović, Marko, "Određivanje in-situ koeficijenta trenja i imperfekcije kablova za prednaprezanje" in Građevinski materijali i konstrukcije, 60, no. 2 (2017):49-56,
https://doi.org/10.5937/grmk1702049B . .

Betonski blokovi za popločavanje sa agregatom od drobljene opeke

Janković, Ksenija

(2016)

TY  - PAT
AU  - Janković, Ksenija
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/555
AB  - Betonski blokovi za popločavanje sa agregatom od drobljene opeke su dimenzija 20 x 10 x 6 cm i
napravljeni su klasičnom tehnologijom dobijanja betona koji se u ovom slučaju sastoji od cementnog kamena (1), rečnog agregata (2) i agregata od drobljene opeke (3). Zamena rečnog agregata (2) drobljenom opekom (3) je iznosila 25% -100%.
Primenom 25% agregata od drobljene opeke (3) moguće je proizvesti betonske blokove za
popločavanje koji zadovoljavaju zahteve evropskog standarda EN 1338 i veoma su primenljivi u
uslovima kontinentalne klime.
T2  - Glasnik intelektualne svojine 2016/4
T1  - Betonski blokovi za popločavanje sa agregatom od drobljene opeke
UR  - https://hdl.handle.net/21.15107/rcub_rims_555
ER  - 
@misc{
author = "Janković, Ksenija",
year = "2016",
abstract = "Betonski blokovi za popločavanje sa agregatom od drobljene opeke su dimenzija 20 x 10 x 6 cm i
napravljeni su klasičnom tehnologijom dobijanja betona koji se u ovom slučaju sastoji od cementnog kamena (1), rečnog agregata (2) i agregata od drobljene opeke (3). Zamena rečnog agregata (2) drobljenom opekom (3) je iznosila 25% -100%.
Primenom 25% agregata od drobljene opeke (3) moguće je proizvesti betonske blokove za
popločavanje koji zadovoljavaju zahteve evropskog standarda EN 1338 i veoma su primenljivi u
uslovima kontinentalne klime.",
journal = "Glasnik intelektualne svojine 2016/4",
title = "Betonski blokovi za popločavanje sa agregatom od drobljene opeke",
url = "https://hdl.handle.net/21.15107/rcub_rims_555"
}
Janković, K.. (2016). Betonski blokovi za popločavanje sa agregatom od drobljene opeke. in Glasnik intelektualne svojine 2016/4.
https://hdl.handle.net/21.15107/rcub_rims_555
Janković K. Betonski blokovi za popločavanje sa agregatom od drobljene opeke. in Glasnik intelektualne svojine 2016/4. 2016;.
https://hdl.handle.net/21.15107/rcub_rims_555 .
Janković, Ksenija, "Betonski blokovi za popločavanje sa agregatom od drobljene opeke" in Glasnik intelektualne svojine 2016/4 (2016),
https://hdl.handle.net/21.15107/rcub_rims_555 .

Durability of concrete with different types of cement

Janković, Ksenija; Lončar, Ljiljana; Bojović, Dragan; Stojanović, Marko

(Procema SA, 2016)

TY  - JOUR
AU  - Janković, Ksenija
AU  - Lončar, Ljiljana
AU  - Bojović, Dragan
AU  - Stojanović, Marko
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/299
AB  - Adequate measures must be taken during the determination of the concrete composition for ensuring the durability of concrete exposed to an aggressive environment. The influence of the cement type on the freeze/thaw resistance with and without de-icing salt of concrete was tested. Samples were made using five types of cement. All types of concrete made according to the recommendations of the Serbian and European norms had the required frost resistance. Besides the respected recommendations, concrete made using cement with 35% mineral additions of fly ash and lime was not freeze/thaw resistant with de-icing salt. Weathering resistance for paving units is determined according to EN 1338 and EN 1339 for freeze/thaw resistance with de-icing salt or water absorption. Taking into account previous investigations, only samples which were made in accordance with the recommendations of the Serbian Building code requirements for concrete and reinforced concrete - BAB 87 and European norms EN 206-1 were tested. Regarding water absorption, it is expected that in the case of established production all types of concrete would be integrated into class 2 according to EN. Also, for two representative types of concrete with different air content and degree of damage done by destructive test, non-destructive test by device RapidAir 457 was done (specific surface, spacing factor, void frequency and average chord length).
PB  - Procema SA
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Durability of concrete with different types of cement
EP  - 221
IS  - 2
SP  - 215
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_rims_299
ER  - 
@article{
author = "Janković, Ksenija and Lončar, Ljiljana and Bojović, Dragan and Stojanović, Marko",
year = "2016",
abstract = "Adequate measures must be taken during the determination of the concrete composition for ensuring the durability of concrete exposed to an aggressive environment. The influence of the cement type on the freeze/thaw resistance with and without de-icing salt of concrete was tested. Samples were made using five types of cement. All types of concrete made according to the recommendations of the Serbian and European norms had the required frost resistance. Besides the respected recommendations, concrete made using cement with 35% mineral additions of fly ash and lime was not freeze/thaw resistant with de-icing salt. Weathering resistance for paving units is determined according to EN 1338 and EN 1339 for freeze/thaw resistance with de-icing salt or water absorption. Taking into account previous investigations, only samples which were made in accordance with the recommendations of the Serbian Building code requirements for concrete and reinforced concrete - BAB 87 and European norms EN 206-1 were tested. Regarding water absorption, it is expected that in the case of established production all types of concrete would be integrated into class 2 according to EN. Also, for two representative types of concrete with different air content and degree of damage done by destructive test, non-destructive test by device RapidAir 457 was done (specific surface, spacing factor, void frequency and average chord length).",
publisher = "Procema SA",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Durability of concrete with different types of cement",
pages = "221-215",
number = "2",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_rims_299"
}
Janković, K., Lončar, L., Bojović, D.,& Stojanović, M.. (2016). Durability of concrete with different types of cement. in Revista Romana de Materiale/ Romanian Journal of Materials
Procema SA., 46(2), 215-221.
https://hdl.handle.net/21.15107/rcub_rims_299
Janković K, Lončar L, Bojović D, Stojanović M. Durability of concrete with different types of cement. in Revista Romana de Materiale/ Romanian Journal of Materials. 2016;46(2):215-221.
https://hdl.handle.net/21.15107/rcub_rims_299 .
Janković, Ksenija, Lončar, Ljiljana, Bojović, Dragan, Stojanović, Marko, "Durability of concrete with different types of cement" in Revista Romana de Materiale/ Romanian Journal of Materials, 46, no. 2 (2016):215-221,
https://hdl.handle.net/21.15107/rcub_rims_299 .
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