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 . .

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 . .

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 . .

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 . .

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 . .

TY  - THES
AU  - Bojović, Dragan
PY  - 2017
UR  - http://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija150088572878676.pdf?controlNumber=(BISIS)10
UR  - https://nardus.mpn.gov.rs/handle/123456789/8654
UR  - http://www.cris.uns.ac.rs/record.jsf?recordId=104910&source=NaRDuS&language=sr
UR  - http://www.cris.uns.ac.rs/DownloadFileServlet/IzvestajKomisije150088577565241.pdf?controlNumber=(BIS
UR  - http://rims.institutims.rs/handle/123456789/8
AB  - U disertaciji je razmatran problem nosivosti ankera na čupanje i smicanje u betonu veoma visokih čvrstoća. Izdvojena su tri parametra koji imaju značajan uticaj na nosivost ankera. Realizovano je obimno eksperimentalno istraživanje, koje je koncipirano tako da se dalje može koristiti u numeričkim analizama. Zaključci su izvedeni na osnovu numeričke analize i definisanja uticaja variranih parametara pomoću neuronskih mreža i faktorijalnog eksperimenta.
AB  - The dissertation discusses the problem of load anchors to pulling out and shearing in ultra high strength concrete. Allocate three parameters that have a significant impact on the load capacity of anchors. Realized an extensive experimental research, which is designed so that could be used in numerical analysis. Conclusions are drawn on the basis of a numerical analysis, and defining the influence of varying the parameters using the neural network and the factorial experiment.
PB  - Univerzitet u Novom Sadu, Fakultet tehničkih nauka
T1  - Parametarska analiza nosivosti ankera na zatezanje i smicanje u mikroarmiranom betonu veoma visokih čvrstoća faktorijalnom analizom i neuronskim mrežama
T1  - Parametric analysis capacity of anchors in tension andshear at fiber reinforced ultra high strength concretefactorial analysis and neural networks
UR  - https://hdl.handle.net/21.15107/rcub_nardus_8654
ER  - 

@phdthesis{
author = "Bojović, Dragan",
year = "2017",
abstract = "U disertaciji je razmatran problem nosivosti ankera na čupanje i smicanje u betonu veoma visokih čvrstoća. Izdvojena su tri parametra koji imaju značajan uticaj na nosivost ankera. Realizovano je obimno eksperimentalno istraživanje, koje je koncipirano tako da se dalje može koristiti u numeričkim analizama. Zaključci su izvedeni na osnovu numeričke analize i definisanja uticaja variranih parametara pomoću neuronskih mreža i faktorijalnog eksperimenta., The dissertation discusses the problem of load anchors to pulling out and shearing in ultra high strength concrete. Allocate three parameters that have a significant impact on the load capacity of anchors. Realized an extensive experimental research, which is designed so that could be used in numerical analysis. Conclusions are drawn on the basis of a numerical analysis, and defining the influence of varying the parameters using the neural network and the factorial experiment.",
publisher = "Univerzitet u Novom Sadu, Fakultet tehničkih nauka",
title = "Parametarska analiza nosivosti ankera na zatezanje i smicanje u mikroarmiranom betonu veoma visokih čvrstoća faktorijalnom analizom i neuronskim mrežama, Parametric analysis capacity of anchors in tension andshear at fiber reinforced ultra high strength concretefactorial analysis and neural networks",
url = "https://hdl.handle.net/21.15107/rcub_nardus_8654"
}

Bojović, D.. (2017). Parametarska analiza nosivosti ankera na zatezanje i smicanje u mikroarmiranom betonu veoma visokih čvrstoća faktorijalnom analizom i neuronskim mrežama. 
Univerzitet u Novom Sadu, Fakultet tehničkih nauka..
https://hdl.handle.net/21.15107/rcub_nardus_8654

Bojović D. Parametarska analiza nosivosti ankera na zatezanje i smicanje u mikroarmiranom betonu veoma visokih čvrstoća faktorijalnom analizom i neuronskim mrežama. 2017;.
https://hdl.handle.net/21.15107/rcub_nardus_8654 .

Bojović, Dragan, "Parametarska analiza nosivosti ankera na zatezanje i smicanje u mikroarmiranom betonu veoma visokih čvrstoća faktorijalnom analizom i neuronskim mrežama" (2017),
https://hdl.handle.net/21.15107/rcub_nardus_8654 .

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 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Stanković, Srboljub J.
AU  - Bojović, Dragan
AU  - Stojanović, Marko
AU  - Antić, Lana
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/295
AB  - The development of building materials with improved characteristics and their application for increasing structure durability and sustainability is one of the goals in construction sector. The main objective of this paper is to evaluate the influence of nano-silica replacement of cement (2% or 5%) and aggregate type (quartz, barite or its combination 50:50 by volume) on the properties of ultra high performance concrete (UHPC). UHPC with nano-silica and combination of barite and quartz aggregate is composite which has finer pore-size distribution, improvement in compressive and flexural strength and in radiation protection characteristics, with potential usage as building material for hospitals and nuclear facilities.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - The influence of nano-silica and barite aggregate on properties of ultra high performance concrete
EP  - 156
SP  - 147
VL  - 126
DO  - 10.1016/j.conbuildmat.2016.09.026
ER  - 

@article{
author = "Janković, Ksenija and Stanković, Srboljub J. and Bojović, Dragan and Stojanović, Marko and Antić, Lana",
year = "2016",
abstract = "The development of building materials with improved characteristics and their application for increasing structure durability and sustainability is one of the goals in construction sector. The main objective of this paper is to evaluate the influence of nano-silica replacement of cement (2% or 5%) and aggregate type (quartz, barite or its combination 50:50 by volume) on the properties of ultra high performance concrete (UHPC). UHPC with nano-silica and combination of barite and quartz aggregate is composite which has finer pore-size distribution, improvement in compressive and flexural strength and in radiation protection characteristics, with potential usage as building material for hospitals and nuclear facilities.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "The influence of nano-silica and barite aggregate on properties of ultra high performance concrete",
pages = "156-147",
volume = "126",
doi = "10.1016/j.conbuildmat.2016.09.026"
}

Janković, K., Stanković, S. J., Bojović, D., Stojanović, M.,& Antić, L.. (2016). The influence of nano-silica and barite aggregate on properties of ultra high performance concrete. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 126, 147-156.
https://doi.org/10.1016/j.conbuildmat.2016.09.026

Janković K, Stanković SJ, Bojović D, Stojanović M, Antić L. The influence of nano-silica and barite aggregate on properties of ultra high performance concrete. in Construction and Building Materials. 2016;126:147-156.
doi:10.1016/j.conbuildmat.2016.09.026 .

Janković, Ksenija, Stanković, Srboljub J., Bojović, Dragan, Stojanović, Marko, Antić, Lana, "The influence of nano-silica and barite aggregate on properties of ultra high performance concrete" in Construction and Building Materials, 126 (2016):147-156,
https://doi.org/10.1016/j.conbuildmat.2016.09.026 . .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Stojanović, Marko
AU  - Lončar, Ljiljana
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/234
AB  - Cementni materijali u poljoprivrednim i drugim industrijskim objektima izloženi su dejstvu kiselina. Zbog toga vek konstrukcija zavisi od trajnosti maltera ili betonskih elemenata u agresivnoj sredini. U radu je predstavljena otpornost na koroziju koja je uzrokovana sulfatnom, nitratnom, ureom, mlečnom i sirćetnom kiselinom. Skenirajuća elektronska mikroskopija (SEM) korišćena je da se ispita efekat agresivnih rastvora na mikrostrukturu i mehaničke osobine maltera. Hemijska otpornost prizmi od maltera i dve vrste betona testirana je prema metodi Koch-Steinegger. Kako je uslov za otpornost na agresivne rastvore taj da zatezna čvrstoća maltera nije manja od 70% u odnosu na referentne prizme negovane u vodi, može se zaključiti da su malter i beton, napravljeni sa CEM III/B, u ovom istraživanju otporni na sve kiseline kojima su tretirani. .
AB  - Cement based materials in the agricultural and other industrial structures are exposed to acid attack. That is the reason why the service life of structure depends on the durability of mortar or concrete elements in aggressive environment. Resistance to corrosion caused by sulphate, nitrate, carbamide, lactic acid and acetic acid was presented. Optical and scanning electron microscopy (SEM) was used to examine the effect of aggressive solutions on the microstructure and mechanical properties of mortar. The chemical resistance of mortar prisms and two types of concrete were tested according to the Koch-Steinegger method. As the condition for resistance in aggressive solution is that flexural strength of mortar prisms is no less than 70 % compared to referent prisms cured in water it can be concluded that mortar and concrete made with CEM III/B in this investigation are resistant to all treated acids.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Građevinski materijali i konstrukcije
T1  - Otpornost materijala na bazi metalurškog cementa na dejstvo kiselina
T1  - Resistance of CEM III/B based materials to acid attack
EP  - 37
IS  - 2
SP  - 29
VL  - 57
DO  - 10.5937/grmk1402029J
ER  - 

@article{
author = "Janković, Ksenija and Bojović, Dragan and Stojanović, Marko and Lončar, Ljiljana",
year = "2014",
abstract = "Cementni materijali u poljoprivrednim i drugim industrijskim objektima izloženi su dejstvu kiselina. Zbog toga vek konstrukcija zavisi od trajnosti maltera ili betonskih elemenata u agresivnoj sredini. U radu je predstavljena otpornost na koroziju koja je uzrokovana sulfatnom, nitratnom, ureom, mlečnom i sirćetnom kiselinom. Skenirajuća elektronska mikroskopija (SEM) korišćena je da se ispita efekat agresivnih rastvora na mikrostrukturu i mehaničke osobine maltera. Hemijska otpornost prizmi od maltera i dve vrste betona testirana je prema metodi Koch-Steinegger. Kako je uslov za otpornost na agresivne rastvore taj da zatezna čvrstoća maltera nije manja od 70% u odnosu na referentne prizme negovane u vodi, može se zaključiti da su malter i beton, napravljeni sa CEM III/B, u ovom istraživanju otporni na sve kiseline kojima su tretirani. ., Cement based materials in the agricultural and other industrial structures are exposed to acid attack. That is the reason why the service life of structure depends on the durability of mortar or concrete elements in aggressive environment. Resistance to corrosion caused by sulphate, nitrate, carbamide, lactic acid and acetic acid was presented. Optical and scanning electron microscopy (SEM) was used to examine the effect of aggressive solutions on the microstructure and mechanical properties of mortar. The chemical resistance of mortar prisms and two types of concrete were tested according to the Koch-Steinegger method. As the condition for resistance in aggressive solution is that flexural strength of mortar prisms is no less than 70 % compared to referent prisms cured in water it can be concluded that mortar and concrete made with CEM III/B in this investigation are resistant to all treated acids.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Građevinski materijali i konstrukcije",
title = "Otpornost materijala na bazi metalurškog cementa na dejstvo kiselina, Resistance of CEM III/B based materials to acid attack",
pages = "37-29",
number = "2",
volume = "57",
doi = "10.5937/grmk1402029J"
}

Janković, K., Bojović, D., Stojanović, M.,& Lončar, L.. (2014). Otpornost materijala na bazi metalurškog cementa na dejstvo kiselina. in Građevinski materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 57(2), 29-37.
https://doi.org/10.5937/grmk1402029J

Janković K, Bojović D, Stojanović M, Lončar L. Otpornost materijala na bazi metalurškog cementa na dejstvo kiselina. in Građevinski materijali i konstrukcije. 2014;57(2):29-37.
doi:10.5937/grmk1402029J .

Janković, Ksenija, Bojović, Dragan, Stojanović, Marko, Lončar, Ljiljana, "Otpornost materijala na bazi metalurškog cementa na dejstvo kiselina" in Građevinski materijali i konstrukcije, 57, no. 2 (2014):29-37,
https://doi.org/10.5937/grmk1402029J . .

TY  - JOUR
AU  - Mitrović, Aleksandra
AU  - Nikolić, Dragan
AU  - Miličić, Ljiljana
AU  - Bojović, Dragan
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/213
AB  - Metakaolin composite cements were prepared with 5 to 35 % replacement of ordinary Portland cement with metakaolin (MK), manufactured by thermal activation/calcination of domestic kaolin clay, and commercial matakaolin (CMK). Performance of the composite cements was evaluated through the setting time (initial and final), compressive strengths (for ages 2, 7, 28, 90 and 180 days) and soundness, and compared with control cement (Portland cement - CEM I). After 28 days, compressive strength was higher than that for control cement for cements prepared with addition of CMK, and with addition of up to 25 % MK.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - Properties of composite cement with commercial and manufactured metakaolin
EP  - 687
IS  - 4
SP  - 683
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_rims_213
ER  - 

@article{
author = "Mitrović, Aleksandra and Nikolić, Dragan and Miličić, Ljiljana and Bojović, Dragan",
year = "2013",
abstract = "Metakaolin composite cements were prepared with 5 to 35 % replacement of ordinary Portland cement with metakaolin (MK), manufactured by thermal activation/calcination of domestic kaolin clay, and commercial matakaolin (CMK). Performance of the composite cements was evaluated through the setting time (initial and final), compressive strengths (for ages 2, 7, 28, 90 and 180 days) and soundness, and compared with control cement (Portland cement - CEM I). After 28 days, compressive strength was higher than that for control cement for cements prepared with addition of CMK, and with addition of up to 25 % MK.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "Properties of composite cement with commercial and manufactured metakaolin",
pages = "687-683",
number = "4",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_rims_213"
}

Mitrović, A., Nikolić, D., Miličić, L.,& Bojović, D.. (2013). Properties of composite cement with commercial and manufactured metakaolin. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 20(4), 683-687.
https://hdl.handle.net/21.15107/rcub_rims_213

Mitrović A, Nikolić D, Miličić L, Bojović D. Properties of composite cement with commercial and manufactured metakaolin. in Tehnicki Vjesnik-Technical Gazette. 2013;20(4):683-687.
https://hdl.handle.net/21.15107/rcub_rims_213 .

Mitrović, Aleksandra, Nikolić, Dragan, Miličić, Ljiljana, Bojović, Dragan, "Properties of composite cement with commercial and manufactured metakaolin" in Tehnicki Vjesnik-Technical Gazette, 20, no. 4 (2013):683-687,
https://hdl.handle.net/21.15107/rcub_rims_213 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Nikolić, D.
AU  - Bojović, Dragan
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/170
AB  - Demolition of old buildings in urban cores has produced a large amount of waste material. Since they are mostly masonry structures the largest part of the waste material is ceramic waste. Besides that, ceramic waste is obtained as a byproduct in the ceramic industry. All of this initiated a research for the application of concrete with recycled brick as aggregate. In this paper, the possibility of using crushed bricks in the production of concrete elements for the pedestrian zone is shown. The application of recycled brick as aggregate, produces concrete of less density and strength, and of increased absorption. All of this also has an effect on the quality of concrete flags and paving blocks. Based on the results obtained by testing the resistance to frost of concrete it was assumed that it is possible to get the products comply with European standards. The results show that replacing up to a 32.5% of natural aggregate with crushed brick aggregate produces concrete blocks, and up to 65% of it produces concrete paving flags which meet the requirements of European standards.
T2  - Construction and Building Materials
T1  - Concrete paving blocks and flags made with crushed brick as aggregate
EP  - 663
IS  - 1
SP  - 659
VL  - 28
DO  - 10.1016/j.conbuildmat.2011.10.036
ER  - 

@article{
author = "Janković, Ksenija and Nikolić, D. and Bojović, Dragan",
year = "2012",
abstract = "Demolition of old buildings in urban cores has produced a large amount of waste material. Since they are mostly masonry structures the largest part of the waste material is ceramic waste. Besides that, ceramic waste is obtained as a byproduct in the ceramic industry. All of this initiated a research for the application of concrete with recycled brick as aggregate. In this paper, the possibility of using crushed bricks in the production of concrete elements for the pedestrian zone is shown. The application of recycled brick as aggregate, produces concrete of less density and strength, and of increased absorption. All of this also has an effect on the quality of concrete flags and paving blocks. Based on the results obtained by testing the resistance to frost of concrete it was assumed that it is possible to get the products comply with European standards. The results show that replacing up to a 32.5% of natural aggregate with crushed brick aggregate produces concrete blocks, and up to 65% of it produces concrete paving flags which meet the requirements of European standards.",
journal = "Construction and Building Materials",
title = "Concrete paving blocks and flags made with crushed brick as aggregate",
pages = "663-659",
number = "1",
volume = "28",
doi = "10.1016/j.conbuildmat.2011.10.036"
}

Janković, K., Nikolić, D.,& Bojović, D.. (2012). Concrete paving blocks and flags made with crushed brick as aggregate. in Construction and Building Materials, 28(1), 659-663.
https://doi.org/10.1016/j.conbuildmat.2011.10.036

Janković K, Nikolić D, Bojović D. Concrete paving blocks and flags made with crushed brick as aggregate. in Construction and Building Materials. 2012;28(1):659-663.
doi:10.1016/j.conbuildmat.2011.10.036 .

Janković, Ksenija, Nikolić, D., Bojović, Dragan, "Concrete paving blocks and flags made with crushed brick as aggregate" in Construction and Building Materials, 28, no. 1 (2012):659-663,
https://doi.org/10.1016/j.conbuildmat.2011.10.036 . .

TY  - JOUR
AU  - Bojović, Dragan
AU  - Jevtić, Dragica
AU  - Knežević, Milos
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/161
AB  - This paper presents the optimization of concrete mixtures composition related to a physical property and the process of production of trial mix design by using the multi-layered feed-forward neural networks. This optimization was conducted because there is no clear method of designing concrete mixture composition and for the purpose of shortening procedure of the trial mix design of concrete. Mix design depend on many variables and deterministic models cannot give good results. The goal of the research was to make a model of a neural network, on the set of available data from 288 trial mix, which would, with highest accuracy, predict the compressive strength of concrete at the age of 28 days. In order to attain as high accuracy of obtained results as possible, three levels of input data to the neural networks were considered. On each of the applied groups of input data, the neural networks with 1 and 2 hidden layers were formed. On the basis of the adopted neural network, an algorithm for usage of the network in actual situations was made, applied on an actual model.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Application of neural networks in determination of compressive strength of concrete
EP  - 22
IS  - 1
SP  - 16
VL  - 42
UR  - https://hdl.handle.net/21.15107/rcub_rims_161
ER  - 

@article{
author = "Bojović, Dragan and Jevtić, Dragica and Knežević, Milos",
year = "2012",
abstract = "This paper presents the optimization of concrete mixtures composition related to a physical property and the process of production of trial mix design by using the multi-layered feed-forward neural networks. This optimization was conducted because there is no clear method of designing concrete mixture composition and for the purpose of shortening procedure of the trial mix design of concrete. Mix design depend on many variables and deterministic models cannot give good results. The goal of the research was to make a model of a neural network, on the set of available data from 288 trial mix, which would, with highest accuracy, predict the compressive strength of concrete at the age of 28 days. In order to attain as high accuracy of obtained results as possible, three levels of input data to the neural networks were considered. On each of the applied groups of input data, the neural networks with 1 and 2 hidden layers were formed. On the basis of the adopted neural network, an algorithm for usage of the network in actual situations was made, applied on an actual model.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Application of neural networks in determination of compressive strength of concrete",
pages = "22-16",
number = "1",
volume = "42",
url = "https://hdl.handle.net/21.15107/rcub_rims_161"
}

Bojović, D., Jevtić, D.,& Knežević, M.. (2012). Application of neural networks in determination of compressive strength of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials, 42(1), 16-22.
https://hdl.handle.net/21.15107/rcub_rims_161

Bojović D, Jevtić D, Knežević M. Application of neural networks in determination of compressive strength of concrete. in Revista Romana de Materiale/ Romanian Journal of Materials. 2012;42(1):16-22.
https://hdl.handle.net/21.15107/rcub_rims_161 .

Bojović, Dragan, Jevtić, Dragica, Knežević, Milos, "Application of neural networks in determination of compressive strength of concrete" in Revista Romana de Materiale/ Romanian Journal of Materials, 42, no. 1 (2012):16-22,
https://hdl.handle.net/21.15107/rcub_rims_161 .

TY  - JOUR
AU  - Bojović, Dragan
AU  - Nikolić, Dragan
AU  - Janković, Ksenija
AU  - Lončar, Ljiljana
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/156
AB  - Mnogi parametri utiču na karakteristike svežeg i očvrslog betona. Jedan od najvažnijih svakako jeste poroznost betona. Poroznost svežeg betona meri se količinom uvučenog vazduha. Uticaj uvučenog vazduha na beton i njegovu pritisnu čvrstoću istraživali su mnogi svetski istraživači. Na bazi tih istraživanja, izdvojene su dve, u praksi najviše korišćene, formule. Tehnike mekog programiranja, a posebno neuronske mreže, s formiranim bazama podataka laboratorijskih ispitivanja betona, otvaraju novi pristup u predviđanju uticaja količine uvučenog vazduha u svežem betonu na njegovu čvrstoću pri pritisku.
AB  - Many parameters influence on the characteristics of fresh and hardened concrete. One of the most important characteristic of concrete is its porosity. Measure the porosity of fresh concrete is measured by the amount of entrained air. The effect of entrained air in concrete on compressive strength investigated by many authors. On the bases these works we have two formulas applicable in practice. Soft programming techniques especialy neural networks and the formation of databases related to the testing in laboratories for concrete opened up new approaches in predicting the impact of the quantity of entrained air in concrete on compressive strength.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Građevinski materijali i konstrukcije
T1  - Ocena uticaja količine vazduha na čvrstoću betona klasičnim pristupom i neuronskim mrežama
T1  - Evaluation of air content on concrete compressive strength with classical approach and neural networks
EP  - 54
IS  - 1
SP  - 47
VL  - 55
UR  - https://hdl.handle.net/21.15107/rcub_rims_156
ER  - 

@article{
author = "Bojović, Dragan and Nikolić, Dragan and Janković, Ksenija and Lončar, Ljiljana",
year = "2012",
abstract = "Mnogi parametri utiču na karakteristike svežeg i očvrslog betona. Jedan od najvažnijih svakako jeste poroznost betona. Poroznost svežeg betona meri se količinom uvučenog vazduha. Uticaj uvučenog vazduha na beton i njegovu pritisnu čvrstoću istraživali su mnogi svetski istraživači. Na bazi tih istraživanja, izdvojene su dve, u praksi najviše korišćene, formule. Tehnike mekog programiranja, a posebno neuronske mreže, s formiranim bazama podataka laboratorijskih ispitivanja betona, otvaraju novi pristup u predviđanju uticaja količine uvučenog vazduha u svežem betonu na njegovu čvrstoću pri pritisku., Many parameters influence on the characteristics of fresh and hardened concrete. One of the most important characteristic of concrete is its porosity. Measure the porosity of fresh concrete is measured by the amount of entrained air. The effect of entrained air in concrete on compressive strength investigated by many authors. On the bases these works we have two formulas applicable in practice. Soft programming techniques especialy neural networks and the formation of databases related to the testing in laboratories for concrete opened up new approaches in predicting the impact of the quantity of entrained air in concrete on compressive strength.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Građevinski materijali i konstrukcije",
title = "Ocena uticaja količine vazduha na čvrstoću betona klasičnim pristupom i neuronskim mrežama, Evaluation of air content on concrete compressive strength with classical approach and neural networks",
pages = "54-47",
number = "1",
volume = "55",
url = "https://hdl.handle.net/21.15107/rcub_rims_156"
}

Bojović, D., Nikolić, D., Janković, K.,& Lončar, L.. (2012). Ocena uticaja količine vazduha na čvrstoću betona klasičnim pristupom i neuronskim mrežama. in Građevinski materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 55(1), 47-54.
https://hdl.handle.net/21.15107/rcub_rims_156

Bojović D, Nikolić D, Janković K, Lončar L. Ocena uticaja količine vazduha na čvrstoću betona klasičnim pristupom i neuronskim mrežama. in Građevinski materijali i konstrukcije. 2012;55(1):47-54.
https://hdl.handle.net/21.15107/rcub_rims_156 .

Bojović, Dragan, Nikolić, Dragan, Janković, Ksenija, Lončar, Ljiljana, "Ocena uticaja količine vazduha na čvrstoću betona klasičnim pristupom i neuronskim mrežama" in Građevinski materijali i konstrukcije, 55, no. 1 (2012):47-54,
https://hdl.handle.net/21.15107/rcub_rims_156 .

TY  - CONF
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
AU  - Janković, Ksenija
AU  - Lončar, Ljiljana
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/154
AB  - The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of ultra high performance concrete (UHPC) is to become more widespread in the concrete industry. Possibilities of getting ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Four series of samples were made with different types of fine reactive additives (silica fume in referent concrete was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%.). The produced mixes had self compacted consistency. The compressive strength varied between 145 and 180 MPa for the steam cered specimens and between 180 and 205 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and autoclaving.
PB  - Czech Concrete Soc-Ceska Betonarska Spolecnost Cssi, Prague 1
C3  - FIB Symposium Prague 2011: Concrete Engineering for Excellence and Efficiency, Vols 1 and 2
T1  - Mix design and engineering properties of ultra high performance self compacting concrete
EP  - 356
SP  - 353
UR  - https://hdl.handle.net/21.15107/rcub_rims_154
ER  - 

@conference{
author = "Nikolić, Dragan and Bojović, Dragan and Janković, Ksenija and Lončar, Ljiljana",
year = "2011",
abstract = "The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of ultra high performance concrete (UHPC) is to become more widespread in the concrete industry. Possibilities of getting ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Four series of samples were made with different types of fine reactive additives (silica fume in referent concrete was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%.). The produced mixes had self compacted consistency. The compressive strength varied between 145 and 180 MPa for the steam cered specimens and between 180 and 205 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and autoclaving.",
publisher = "Czech Concrete Soc-Ceska Betonarska Spolecnost Cssi, Prague 1",
journal = "FIB Symposium Prague 2011: Concrete Engineering for Excellence and Efficiency, Vols 1 and 2",
title = "Mix design and engineering properties of ultra high performance self compacting concrete",
pages = "356-353",
url = "https://hdl.handle.net/21.15107/rcub_rims_154"
}

Nikolić, D., Bojović, D., Janković, K.,& Lončar, L.. (2011). Mix design and engineering properties of ultra high performance self compacting concrete. in FIB Symposium Prague 2011: Concrete Engineering for Excellence and Efficiency, Vols 1 and 2
Czech Concrete Soc-Ceska Betonarska Spolecnost Cssi, Prague 1., 353-356.
https://hdl.handle.net/21.15107/rcub_rims_154

Nikolić D, Bojović D, Janković K, Lončar L. Mix design and engineering properties of ultra high performance self compacting concrete. in FIB Symposium Prague 2011: Concrete Engineering for Excellence and Efficiency, Vols 1 and 2. 2011;:353-356.
https://hdl.handle.net/21.15107/rcub_rims_154 .

Nikolić, Dragan, Bojović, Dragan, Janković, Ksenija, Lončar, Ljiljana, "Mix design and engineering properties of ultra high performance self compacting concrete" in FIB Symposium Prague 2011: Concrete Engineering for Excellence and Efficiency, Vols 1 and 2 (2011):353-356,
https://hdl.handle.net/21.15107/rcub_rims_154 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Stanković, Srboljub J.
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/153
AB  - The evaluation of the dynamic modulus of elasticity of twelve different concrete mix proportions as a function of the density and degradations due to freeze/thaw cycles is presented in this paper. Pore system and saturation are the main factors for concrete freeze-thaw resistance. The frequency analysis of ultrasonic waves in concrete after every 25 cycles was done. Dynamic modulus of elasticity was determination by resonance frequency analysis. This parameter is 35-50% smaller for concrete with recycled bricks as aggregate than ordinary concrete. For all concrete mixes dynamic and static (measured by destructive testing) modules of elasticity were compared.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Determination of recycled aggregate concrete degradation by resonance frequency analysis
EP  - 25
IS  - 1
SP  - 22
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_vinar_4253
ER  - 

@article{
author = "Janković, Ksenija and Stanković, Srboljub J. and Nikolić, Dragan and Bojović, Dragan and Lončar, Ljiljana",
year = "2011",
abstract = "The evaluation of the dynamic modulus of elasticity of twelve different concrete mix proportions as a function of the density and degradations due to freeze/thaw cycles is presented in this paper. Pore system and saturation are the main factors for concrete freeze-thaw resistance. The frequency analysis of ultrasonic waves in concrete after every 25 cycles was done. Dynamic modulus of elasticity was determination by resonance frequency analysis. This parameter is 35-50% smaller for concrete with recycled bricks as aggregate than ordinary concrete. For all concrete mixes dynamic and static (measured by destructive testing) modules of elasticity were compared.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Determination of recycled aggregate concrete degradation by resonance frequency analysis",
pages = "25-22",
number = "1",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_vinar_4253"
}

Janković, K., Stanković, S. J., Nikolić, D., Bojović, D.,& Lončar, L.. (2011). Determination of recycled aggregate concrete degradation by resonance frequency analysis. in Revista Romana de Materiale/ Romanian Journal of Materials, 41(1), 22-25.
https://hdl.handle.net/21.15107/rcub_vinar_4253

Janković K, Stanković SJ, Nikolić D, Bojović D, Lončar L. Determination of recycled aggregate concrete degradation by resonance frequency analysis. in Revista Romana de Materiale/ Romanian Journal of Materials. 2011;41(1):22-25.
https://hdl.handle.net/21.15107/rcub_vinar_4253 .

Janković, Ksenija, Stanković, Srboljub J., Nikolić, Dragan, Bojović, Dragan, Lončar, Ljiljana, "Determination of recycled aggregate concrete degradation by resonance frequency analysis" in Revista Romana de Materiale/ Romanian Journal of Materials, 41, no. 1 (2011):22-25,
https://hdl.handle.net/21.15107/rcub_vinar_4253 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Cirović, Goran
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/149
AB  - Preparation and microstructure of ultra high performance concrete (UHPC) have been intensively analyzed In the last few years. The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry. Possibilities of making ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Three series of samples were made with different types of fine reactive additives (silica fume was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%). The produced mixes had self compacted consistency. The 28(th) day compressive strength varied between 165 and 195 MPa for the heat treated specimens and between 135 and 150 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and super-heated steam under preassure.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures
EP  - 218
IS  - 3
SP  - 211
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_rims_149
ER  - 

@article{
author = "Janković, Ksenija and Cirović, Goran and Nikolić, Dragan and Bojović, Dragan",
year = "2011",
abstract = "Preparation and microstructure of ultra high performance concrete (UHPC) have been intensively analyzed In the last few years. The mechanical properties (compressive strength and flexural strength) were investigated under different curing conditions (standard and steam curing). Silica fumes have characteristics that make them necessary in cement composites with ultra strength properties. The search for substitute products thus appears important if the use of UHPC is to become more widespread in the concrete industry. Possibilities of making ultra high performance self compacting concrete (UHPSCC) with materials available in Serbia, based on experimental work are discussed in this paper. Three series of samples were made with different types of fine reactive additives (silica fume was replaced with metakaolin at 20% and 40% and with fine fly ash at 20%). The produced mixes had self compacted consistency. The 28(th) day compressive strength varied between 165 and 195 MPa for the heat treated specimens and between 135 and 150 MPa for the ones that had not been heat treated. Furthermore, this paper presents SEM micrographs of C-S-H phase formed after steam curing and super-heated steam under preassure.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures",
pages = "218-211",
number = "3",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_rims_149"
}

Janković, K., Cirović, G., Nikolić, D.,& Bojović, D.. (2011). Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures. in Revista Romana de Materiale/ Romanian Journal of Materials, 41(3), 211-218.
https://hdl.handle.net/21.15107/rcub_rims_149

Janković K, Cirović G, Nikolić D, Bojović D. Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures. in Revista Romana de Materiale/ Romanian Journal of Materials. 2011;41(3):211-218.
https://hdl.handle.net/21.15107/rcub_rims_149 .

Janković, Ksenija, Cirović, Goran, Nikolić, Dragan, Bojović, Dragan, "Mechanical properties of ultra high performance self compacting concrete with different mineral admixtures" in Revista Romana de Materiale/ Romanian Journal of Materials, 41, no. 3 (2011):211-218,
https://hdl.handle.net/21.15107/rcub_rims_149 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Romakov, Zoran
AU  - Bojović, Dragan
AU  - Nikolić, Dragan B.
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/145
AB  - Reconstruction of Northwest breakwater in the Tripoli Harbour - Libya (about 4500 m long) required manufacture of various concrete elements (cubes and accropodes) in total amount of 550 000 m(3). Volumes of cubes were 6,3 m(3), 8,5 m(3) and 12,7 m(3), volumes of accropodes were 6,3 m(3) and 9,0 m(3). After preliminary trials and trial production, an optimum mix proportion was chosen, in compliance with technical specification requirements. One of the main causes for concrete blocks cracking is the temperature difference between core and external surface of the blocks, so new blocks with new mix proportions were made (three variations in cement content). Temperature was measured at three characteristic points: in the middle of the cube, in the middle of vertical outer surface and in the middle of horizontal upper edge. Finally, optimal proportions of the constituent materials were adopted.
PB  - Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
T2  - Tehnički vjesnik
T1  - Concrete mix design for reconstruction of northwest breakwater in the Tripoli harbour - Libya
EP  - 151
IS  - 1
SP  - 141
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_rims_145
ER  - 

@article{
author = "Janković, Ksenija and Romakov, Zoran and Bojović, Dragan and Nikolić, Dragan B.",
year = "2011",
abstract = "Reconstruction of Northwest breakwater in the Tripoli Harbour - Libya (about 4500 m long) required manufacture of various concrete elements (cubes and accropodes) in total amount of 550 000 m(3). Volumes of cubes were 6,3 m(3), 8,5 m(3) and 12,7 m(3), volumes of accropodes were 6,3 m(3) and 9,0 m(3). After preliminary trials and trial production, an optimum mix proportion was chosen, in compliance with technical specification requirements. One of the main causes for concrete blocks cracking is the temperature difference between core and external surface of the blocks, so new blocks with new mix proportions were made (three variations in cement content). Temperature was measured at three characteristic points: in the middle of the cube, in the middle of vertical outer surface and in the middle of horizontal upper edge. Finally, optimal proportions of the constituent materials were adopted.",
publisher = "Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek",
journal = "Tehnički vjesnik",
title = "Concrete mix design for reconstruction of northwest breakwater in the Tripoli harbour - Libya",
pages = "151-141",
number = "1",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_rims_145"
}

Janković, K., Romakov, Z., Bojović, D.,& Nikolić, D. B.. (2011). Concrete mix design for reconstruction of northwest breakwater in the Tripoli harbour - Libya. in Tehnički vjesnik
Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek., 18(1), 141-151.
https://hdl.handle.net/21.15107/rcub_rims_145

Janković K, Romakov Z, Bojović D, Nikolić DB. Concrete mix design for reconstruction of northwest breakwater in the Tripoli harbour - Libya. in Tehnički vjesnik. 2011;18(1):141-151.
https://hdl.handle.net/21.15107/rcub_rims_145 .

Janković, Ksenija, Romakov, Zoran, Bojović, Dragan, Nikolić, Dragan B., "Concrete mix design for reconstruction of northwest breakwater in the Tripoli harbour - Libya" in Tehnički vjesnik, 18, no. 1 (2011):141-151,
https://hdl.handle.net/21.15107/rcub_rims_145 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
AU  - Romakov, Zoran
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/132
AB  - Procena čvrstoće pri pritisku se postavlja kao važan zadatak proizvođačima betona, naročito pri projektovanju betonskih mešavina i obezbeđenju zahtevanog kvaliteta proizvedenog betona. U radu je prikazano poređenje eksperimentalnih rezultata čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom sa rezultatima dobijenim na osnovu jednačina prikazanih u tehničkoj regulativi. Prikazan je koeficijent determinacije eksperimentalnih podataka i rezultata dobijenih na osnovu preračuna prema jednačinama datim u EN 1992-1-1, ACI 209 i tabeli za preračun datoj u SRPS U.M1.048. Prikaz zavisnosti čvrstoće pri pritisku betona na osnovu jednačina datih u radu se odnosi na određivanje zavisnosti u odnosu na vrstu upotrebljenog cementa i starosti betona negovanog na konstantnoj temperaturi.
AB  - Estimation of concrete strength is an important issue in ready-mixed concrete industry, especially, in proportioning new mixtures and for the quality assurance of the concrete produced. In this article, on the basis of the existing experimental data of compressive strength of normal and recycled aggregate concrete and equation for compressive strength calculating given in Technical regulation are compared. The accuracies of prediction by experimental data obtained in laboratory as well as by EN 1992-1-1, ACI 209 and SRPS U.M1.048 are compared on the basis of the coefficient of determination. The determination of the compressive strengths by the equation described here relies on determination of type of cement and age of concrete with the constant curing temperature.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Architecture and Civil Engineering
T1  - Procena čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom
T1  - The estimation of compressive strength of normal and recycled aggregate concrete
EP  - 431
IS  - 3
SP  - 419
VL  - 9
DO  - 10.2298/FUACE1103419J
ER  - 

@article{
author = "Janković, Ksenija and Nikolić, Dragan and Bojović, Dragan and Lončar, Ljiljana and Romakov, Zoran",
year = "2011",
abstract = "Procena čvrstoće pri pritisku se postavlja kao važan zadatak proizvođačima betona, naročito pri projektovanju betonskih mešavina i obezbeđenju zahtevanog kvaliteta proizvedenog betona. U radu je prikazano poređenje eksperimentalnih rezultata čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom sa rezultatima dobijenim na osnovu jednačina prikazanih u tehničkoj regulativi. Prikazan je koeficijent determinacije eksperimentalnih podataka i rezultata dobijenih na osnovu preračuna prema jednačinama datim u EN 1992-1-1, ACI 209 i tabeli za preračun datoj u SRPS U.M1.048. Prikaz zavisnosti čvrstoće pri pritisku betona na osnovu jednačina datih u radu se odnosi na određivanje zavisnosti u odnosu na vrstu upotrebljenog cementa i starosti betona negovanog na konstantnoj temperaturi., Estimation of concrete strength is an important issue in ready-mixed concrete industry, especially, in proportioning new mixtures and for the quality assurance of the concrete produced. In this article, on the basis of the existing experimental data of compressive strength of normal and recycled aggregate concrete and equation for compressive strength calculating given in Technical regulation are compared. The accuracies of prediction by experimental data obtained in laboratory as well as by EN 1992-1-1, ACI 209 and SRPS U.M1.048 are compared on the basis of the coefficient of determination. The determination of the compressive strengths by the equation described here relies on determination of type of cement and age of concrete with the constant curing temperature.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Architecture and Civil Engineering",
title = "Procena čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom, The estimation of compressive strength of normal and recycled aggregate concrete",
pages = "431-419",
number = "3",
volume = "9",
doi = "10.2298/FUACE1103419J"
}

Janković, K., Nikolić, D., Bojović, D., Lončar, L.,& Romakov, Z.. (2011). Procena čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom. in Facta universitatis - series: Architecture and Civil Engineering
Univerzitet u Nišu, Niš., 9(3), 419-431.
https://doi.org/10.2298/FUACE1103419J

Janković K, Nikolić D, Bojović D, Lončar L, Romakov Z. Procena čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom. in Facta universitatis - series: Architecture and Civil Engineering. 2011;9(3):419-431.
doi:10.2298/FUACE1103419J .

Janković, Ksenija, Nikolić, Dragan, Bojović, Dragan, Lončar, Ljiljana, Romakov, Zoran, "Procena čvrstoće pri pritisku betona sa prirodnim i recikliranim agregatom" in Facta universitatis - series: Architecture and Civil Engineering, 9, no. 3 (2011):419-431,
https://doi.org/10.2298/FUACE1103419J . .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Nikolić, Dragan
AU  - Lončar, Ljiljana
AU  - Romakov, Zoran
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/128
AB  - Predmet istraživanja su betoni spravljeni sa recikliranom opekom kao agregatom. Eksperimentalni rad je obuhvatio više vrsta betona spravljenih sa istom količinom cementa (385 kg/m3) i istom konzistencijom (sleganje oko 1 cm). Kao agregat je korišćena reciklirana opeka i kombinacija reciklirane opeke i prirodnog rečnog agregata. Posmatran je uticaj upotrebljenih frakcija drobljene opeke i njihovog procentualnog učešća na čvrstoću pri pritisku, upijanje vode i otpornost prema dejstvu mraza. Na osnovu rezultata eksperimentalnih istraživanja može se zaključiti da se primenom reciklirane opeke kao agregata dobija novi kompozitni materijal sa zadovoljavajućim fizičko - mehaničkim karakteristikama.
AB  - The investigation included concrete made by using recycled brick as aggregate. Experimental work included several types of concrete made with the same cement content (385 kg/m3), and same consistency (slump about 1 cm). Recycled brick and combination of natural river aggregate and recycled brick were used as aggregates. The influence of percentage and grain size of crushed brick aggregate on concrete compressive strength, water absorption and frost resistance were observed. On the basis of the results obtained during experimental research, a general conclusion can be drawn that the application of recycled concrete as aggregate can lead to new composites with satisfactory physical-mechanical properties.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Architecture and Civil Engineering
T1  - Otpornost prema dejstvu mraza betona sa agregatom od drobljene opeke
T1  - Frost resistance of concrete with crushed brick as aggregate
EP  - 162
IS  - 2
SP  - 155
VL  - 8
DO  - 10.2298/FUACE1002155J
ER  - 

@article{
author = "Janković, Ksenija and Bojović, Dragan and Nikolić, Dragan and Lončar, Ljiljana and Romakov, Zoran",
year = "2010",
abstract = "Predmet istraživanja su betoni spravljeni sa recikliranom opekom kao agregatom. Eksperimentalni rad je obuhvatio više vrsta betona spravljenih sa istom količinom cementa (385 kg/m3) i istom konzistencijom (sleganje oko 1 cm). Kao agregat je korišćena reciklirana opeka i kombinacija reciklirane opeke i prirodnog rečnog agregata. Posmatran je uticaj upotrebljenih frakcija drobljene opeke i njihovog procentualnog učešća na čvrstoću pri pritisku, upijanje vode i otpornost prema dejstvu mraza. Na osnovu rezultata eksperimentalnih istraživanja može se zaključiti da se primenom reciklirane opeke kao agregata dobija novi kompozitni materijal sa zadovoljavajućim fizičko - mehaničkim karakteristikama., The investigation included concrete made by using recycled brick as aggregate. Experimental work included several types of concrete made with the same cement content (385 kg/m3), and same consistency (slump about 1 cm). Recycled brick and combination of natural river aggregate and recycled brick were used as aggregates. The influence of percentage and grain size of crushed brick aggregate on concrete compressive strength, water absorption and frost resistance were observed. On the basis of the results obtained during experimental research, a general conclusion can be drawn that the application of recycled concrete as aggregate can lead to new composites with satisfactory physical-mechanical properties.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Architecture and Civil Engineering",
title = "Otpornost prema dejstvu mraza betona sa agregatom od drobljene opeke, Frost resistance of concrete with crushed brick as aggregate",
pages = "162-155",
number = "2",
volume = "8",
doi = "10.2298/FUACE1002155J"
}

Janković, K., Bojović, D., Nikolić, D., Lončar, L.,& Romakov, Z.. (2010). Otpornost prema dejstvu mraza betona sa agregatom od drobljene opeke. in Facta universitatis - series: Architecture and Civil Engineering
Univerzitet u Nišu, Niš., 8(2), 155-162.
https://doi.org/10.2298/FUACE1002155J

Janković K, Bojović D, Nikolić D, Lončar L, Romakov Z. Otpornost prema dejstvu mraza betona sa agregatom od drobljene opeke. in Facta universitatis - series: Architecture and Civil Engineering. 2010;8(2):155-162.
doi:10.2298/FUACE1002155J .

Janković, Ksenija, Bojović, Dragan, Nikolić, Dragan, Lončar, Ljiljana, Romakov, Zoran, "Otpornost prema dejstvu mraza betona sa agregatom od drobljene opeke" in Facta universitatis - series: Architecture and Civil Engineering, 8, no. 2 (2010):155-162,
https://doi.org/10.2298/FUACE1002155J . .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Nikolić, Dragan
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/124
AB  - By using crushed brick as aggregate, the structure of concrete can be effectively modeled and materials with very different physical-mechanical characteristics can be obtained. Determination of the influence of polymer admixture on some modified concrete properties is shown in this paper. Experimental work included several types of concrete made with different cement content (250 or 350 kg/m(3)), and same consistency (slump about 5 cm). Few types of concrete made with 4% admixture of polymer (dry material) by weight of cement. Recycled brick or combination of river sand and recycled brick were used as aggregates. Results of determination of concrete compressive and bending strength, modulus of elasticity, coefficient of thermal conductivity, resistance to freezing-thawing, water permeability, shrinkage and creep, and stress - strain diagram were observed.
T2  - Revista Romana de Materiale/ Romanian Journal of Materials
T1  - Some properties of concrete based on recycled bricks
EP  - 227
IS  - 3
SP  - 222
VL  - 40
UR  - https://hdl.handle.net/21.15107/rcub_rims_124
ER  - 

@article{
author = "Janković, Ksenija and Bojović, Dragan and Nikolić, Dragan",
year = "2010",
abstract = "By using crushed brick as aggregate, the structure of concrete can be effectively modeled and materials with very different physical-mechanical characteristics can be obtained. Determination of the influence of polymer admixture on some modified concrete properties is shown in this paper. Experimental work included several types of concrete made with different cement content (250 or 350 kg/m(3)), and same consistency (slump about 5 cm). Few types of concrete made with 4% admixture of polymer (dry material) by weight of cement. Recycled brick or combination of river sand and recycled brick were used as aggregates. Results of determination of concrete compressive and bending strength, modulus of elasticity, coefficient of thermal conductivity, resistance to freezing-thawing, water permeability, shrinkage and creep, and stress - strain diagram were observed.",
journal = "Revista Romana de Materiale/ Romanian Journal of Materials",
title = "Some properties of concrete based on recycled bricks",
pages = "227-222",
number = "3",
volume = "40",
url = "https://hdl.handle.net/21.15107/rcub_rims_124"
}

Janković, K., Bojović, D.,& Nikolić, D.. (2010). Some properties of concrete based on recycled bricks. in Revista Romana de Materiale/ Romanian Journal of Materials, 40(3), 222-227.
https://hdl.handle.net/21.15107/rcub_rims_124

Janković K, Bojović D, Nikolić D. Some properties of concrete based on recycled bricks. in Revista Romana de Materiale/ Romanian Journal of Materials. 2010;40(3):222-227.
https://hdl.handle.net/21.15107/rcub_rims_124 .

Janković, Ksenija, Bojović, Dragan, Nikolić, Dragan, "Some properties of concrete based on recycled bricks" in Revista Romana de Materiale/ Romanian Journal of Materials, 40, no. 3 (2010):222-227,
https://hdl.handle.net/21.15107/rcub_rims_124 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Nikolić, Dragan
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/120
AB  - Značajno mesto u primeni novih materijala u građevinarstvu zauzima upotreba betona ultra visokih čvrstoća. Struktura, svojstva i tehnologija izrade ove vrsta betona se intenzivno proučava poslednjih petnaest godina. U ovom radu je prikazana mogućnost dobijanja betona ultra visokih čvrstoća na osnovu eksperimentalnih istraživanja primenom komponentnih materijala dostupnih u Srbiji. Spravljene su tri serije uzoraka sa različitim vrstama cemenata. Korišćena su čelična vlakna dužine 8mm i poprečnog preseka 0.175mm. Prikazana su fizičko-mehanička svojstva betona ultra visokih čvrstoća i analizirana je mikrostruktura ovog kompozita.
AB  - Modern civil engineering is characterized with increased application of Ultra-high strength concrete (UHSC). Structure, properties and manufacturing technologies of UHSC are intensively analyzed in the last fifteen years. Possibilities of getting UHSC designed with the materials that are available in Serbian market, were tested in the experimental work; they are shown in this paper. Three series of samples were made with different types of cement. Steel fibers were used: length 8 mm, diameter 0.175 mm. Physical-mechanical properties of UHSC are presented and microstructure of concrete was observed, as well.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Materijali i konstrukcije
T1  - Neka svojstva betona ultra visokih čvrstoća
T1  - Some properties of ultra-high strength concrete
EP  - 51
IS  - 1
SP  - 43
VL  - 53
UR  - https://hdl.handle.net/21.15107/rcub_rims_120
ER  - 

@article{
author = "Janković, Ksenija and Nikolić, Dragan and Bojović, Dragan and Lončar, Ljiljana",
year = "2010",
abstract = "Značajno mesto u primeni novih materijala u građevinarstvu zauzima upotreba betona ultra visokih čvrstoća. Struktura, svojstva i tehnologija izrade ove vrsta betona se intenzivno proučava poslednjih petnaest godina. U ovom radu je prikazana mogućnost dobijanja betona ultra visokih čvrstoća na osnovu eksperimentalnih istraživanja primenom komponentnih materijala dostupnih u Srbiji. Spravljene su tri serije uzoraka sa različitim vrstama cemenata. Korišćena su čelična vlakna dužine 8mm i poprečnog preseka 0.175mm. Prikazana su fizičko-mehanička svojstva betona ultra visokih čvrstoća i analizirana je mikrostruktura ovog kompozita., Modern civil engineering is characterized with increased application of Ultra-high strength concrete (UHSC). Structure, properties and manufacturing technologies of UHSC are intensively analyzed in the last fifteen years. Possibilities of getting UHSC designed with the materials that are available in Serbian market, were tested in the experimental work; they are shown in this paper. Three series of samples were made with different types of cement. Steel fibers were used: length 8 mm, diameter 0.175 mm. Physical-mechanical properties of UHSC are presented and microstructure of concrete was observed, as well.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Materijali i konstrukcije",
title = "Neka svojstva betona ultra visokih čvrstoća, Some properties of ultra-high strength concrete",
pages = "51-43",
number = "1",
volume = "53",
url = "https://hdl.handle.net/21.15107/rcub_rims_120"
}

Janković, K., Nikolić, D., Bojović, D.,& Lončar, L.. (2010). Neka svojstva betona ultra visokih čvrstoća. in Materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 53(1), 43-51.
https://hdl.handle.net/21.15107/rcub_rims_120

Janković K, Nikolić D, Bojović D, Lončar L. Neka svojstva betona ultra visokih čvrstoća. in Materijali i konstrukcije. 2010;53(1):43-51.
https://hdl.handle.net/21.15107/rcub_rims_120 .

Janković, Ksenija, Nikolić, Dragan, Bojović, Dragan, Lončar, Ljiljana, "Neka svojstva betona ultra visokih čvrstoća" in Materijali i konstrukcije, 53, no. 1 (2010):43-51,
https://hdl.handle.net/21.15107/rcub_rims_120 .

TY  - JOUR
AU  - Stanković, Srboljub J.
AU  - Ilić, R. D.
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, B.
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/111
AB  - Nuclear facilities as nuclear power stations, nuclear research reactors, particle accelerators and linear accelerator in medical institution using concrete in building construction. The different type materials of the aggregate as component of concrete were analyzed to provide radiation protection. The energy deposited the transmission factor and the mass attenuation coefficients in ordinary and barite concretes have been calculated with the photon transport Monte Carlo software. The numerical simulations results show that using barite as an aggregate in the concrete is one of the solutions for gamma ray shielding. Thereat, it is shown non-destructive method for determining the gamma radiation absorption characteristics of concrete.
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica A
T1  - Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials
EP  - 816
IS  - 5
SP  - 812
VL  - 117
DO  - 10.12693/APhysPolA.117.812
ER  - 

@article{
author = "Stanković, Srboljub J. and Ilić, R. D. and Janković, Ksenija and Bojović, Dragan and Lončar, B.",
year = "2010",
abstract = "Nuclear facilities as nuclear power stations, nuclear research reactors, particle accelerators and linear accelerator in medical institution using concrete in building construction. The different type materials of the aggregate as component of concrete were analyzed to provide radiation protection. The energy deposited the transmission factor and the mass attenuation coefficients in ordinary and barite concretes have been calculated with the photon transport Monte Carlo software. The numerical simulations results show that using barite as an aggregate in the concrete is one of the solutions for gamma ray shielding. Thereat, it is shown non-destructive method for determining the gamma radiation absorption characteristics of concrete.",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica A",
title = "Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials",
pages = "816-812",
number = "5",
volume = "117",
doi = "10.12693/APhysPolA.117.812"
}

Stanković, S. J., Ilić, R. D., Janković, K., Bojović, D.,& Lončar, B.. (2010). Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials. in Acta Physica Polonica A
Polish Acad Sciences Inst Physics, Warsaw., 117(5), 812-816.
https://doi.org/10.12693/APhysPolA.117.812

Stanković SJ, Ilić RD, Janković K, Bojović D, Lončar B. Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials. in Acta Physica Polonica A. 2010;117(5):812-816.
doi:10.12693/APhysPolA.117.812 .

Stanković, Srboljub J., Ilić, R. D., Janković, Ksenija, Bojović, Dragan, Lončar, B., "Gamma Radiation Absorption Characteristics of Concrete with Components of Different Type Materials" in Acta Physica Polonica A, 117, no. 5 (2010):812-816,
https://doi.org/10.12693/APhysPolA.117.812 . .

TY  - CONF
AU  - Bojović, Dragan
AU  - Janković, Ksenija
AU  - Lončar, Ljiljana
AU  - Kačarević, Z.D.
AU  - Terzić, Anja
PY  - 2007
UR  - http://rims.institutims.rs/handle/123456789/67
AB  - Sulphur concrete is a relatively new material, and although similar in final appearance to portland cement concrete, its manufacture, handling, use, and testing are different. Sulphur concrete is a thermoplastic material prepared by hot-mixing sulphur cements and mineral aggregates. Sulphur concrete solidifies and gains strength rapidly upon cooling. As with other concrete materials, such a portland cement and asphalt concrete, sulphur concrete is a generic term for a range of products that vary with aggregates, sulphur cements, and proportions used. By using sulphur cement binders and aggregates that are not attacked by many mineral acid and salt solutions, high-strength corrosion-resistant sulphur concrete can be produced for use in certain applications where other construction materials deteriorate rapidly. Sulphur concretes are generally not resistant to alkalis or oxidizers but exhibit excellent performance in many acidic and salt environment.
PB  - Structural Engineering Conferences, SECON
C3  - Concrete Structures - Stimulators of Development, Proceedings of the fib Symposium Dubrovnik 2007
T1  - Sulphur concrete
EP  - 414
SP  - 407
UR  - https://hdl.handle.net/21.15107/rcub_rims_67
ER  - 

@conference{
author = "Bojović, Dragan and Janković, Ksenija and Lončar, Ljiljana and Kačarević, Z.D. and Terzić, Anja",
year = "2007",
abstract = "Sulphur concrete is a relatively new material, and although similar in final appearance to portland cement concrete, its manufacture, handling, use, and testing are different. Sulphur concrete is a thermoplastic material prepared by hot-mixing sulphur cements and mineral aggregates. Sulphur concrete solidifies and gains strength rapidly upon cooling. As with other concrete materials, such a portland cement and asphalt concrete, sulphur concrete is a generic term for a range of products that vary with aggregates, sulphur cements, and proportions used. By using sulphur cement binders and aggregates that are not attacked by many mineral acid and salt solutions, high-strength corrosion-resistant sulphur concrete can be produced for use in certain applications where other construction materials deteriorate rapidly. Sulphur concretes are generally not resistant to alkalis or oxidizers but exhibit excellent performance in many acidic and salt environment.",
publisher = "Structural Engineering Conferences, SECON",
journal = "Concrete Structures - Stimulators of Development, Proceedings of the fib Symposium Dubrovnik 2007",
title = "Sulphur concrete",
pages = "414-407",
url = "https://hdl.handle.net/21.15107/rcub_rims_67"
}

Bojović, D., Janković, K., Lončar, L., Kačarević, Z.D.,& Terzić, A.. (2007). Sulphur concrete. in Concrete Structures - Stimulators of Development, Proceedings of the fib Symposium Dubrovnik 2007
Structural Engineering Conferences, SECON., 407-414.
https://hdl.handle.net/21.15107/rcub_rims_67

Bojović D, Janković K, Lončar L, Kačarević Z, Terzić A. Sulphur concrete. in Concrete Structures - Stimulators of Development, Proceedings of the fib Symposium Dubrovnik 2007. 2007;:407-414.
https://hdl.handle.net/21.15107/rcub_rims_67 .

Bojović, Dragan, Janković, Ksenija, Lončar, Ljiljana, Kačarević, Z.D., Terzić, Anja, "Sulphur concrete" in Concrete Structures - Stimulators of Development, Proceedings of the fib Symposium Dubrovnik 2007 (2007):407-414,
https://hdl.handle.net/21.15107/rcub_rims_67 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
AU  - Kačarević, Zoran
AU  - Nikolić, Dragan
PY  - 2007
UR  - http://rims.institutims.rs/handle/123456789/65
AB  - Nove vrste betona u svetskoj praksi su u stalnoj upotrebi. Primena samozbijajućih betona u Srbiji je počela pre nekoliko godina. Za izgradnju Avalskog tornja koristiće se ova vrsta betona. Potrebe za dobrom završnom obradom, kratkim rokovima kao i nižom cenom izgradnje uputili su izvođača na primenu samozbijajućih betona.
AB  - In the world, new kinds of concrete are constantly being put to use. In the last few years we have made self-compacting concrete in Serbia. This kind of concrete will be use for construction of Avala tower. The contractor chose self-compacting concrete because of the need for excellent finishing, short deadlines and lower cost of building.
PB  - Univerzitet u Novom Sadu - Građevinski fakultet, Subotica
T2  - Zbornik radova Građevinskog fakulteta, Subotica
T1  - Projektovanje betonskih mešavina za izgradnju Avalskog tornja
T1  - Mix design of concrete for Avala tower
EP  - 120
IS  - 16
SP  - 115
UR  - https://hdl.handle.net/21.15107/rcub_rims_65
ER  - 

@article{
author = "Janković, Ksenija and Bojović, Dragan and Lončar, Ljiljana and Kačarević, Zoran and Nikolić, Dragan",
year = "2007",
abstract = "Nove vrste betona u svetskoj praksi su u stalnoj upotrebi. Primena samozbijajućih betona u Srbiji je počela pre nekoliko godina. Za izgradnju Avalskog tornja koristiće se ova vrsta betona. Potrebe za dobrom završnom obradom, kratkim rokovima kao i nižom cenom izgradnje uputili su izvođača na primenu samozbijajućih betona., In the world, new kinds of concrete are constantly being put to use. In the last few years we have made self-compacting concrete in Serbia. This kind of concrete will be use for construction of Avala tower. The contractor chose self-compacting concrete because of the need for excellent finishing, short deadlines and lower cost of building.",
publisher = "Univerzitet u Novom Sadu - Građevinski fakultet, Subotica",
journal = "Zbornik radova Građevinskog fakulteta, Subotica",
title = "Projektovanje betonskih mešavina za izgradnju Avalskog tornja, Mix design of concrete for Avala tower",
pages = "120-115",
number = "16",
url = "https://hdl.handle.net/21.15107/rcub_rims_65"
}

Janković, K., Bojović, D., Lončar, L., Kačarević, Z.,& Nikolić, D.. (2007). Projektovanje betonskih mešavina za izgradnju Avalskog tornja. in Zbornik radova Građevinskog fakulteta, Subotica
Univerzitet u Novom Sadu - Građevinski fakultet, Subotica.(16), 115-120.
https://hdl.handle.net/21.15107/rcub_rims_65

Janković K, Bojović D, Lončar L, Kačarević Z, Nikolić D. Projektovanje betonskih mešavina za izgradnju Avalskog tornja. in Zbornik radova Građevinskog fakulteta, Subotica. 2007;(16):115-120.
https://hdl.handle.net/21.15107/rcub_rims_65 .

Janković, Ksenija, Bojović, Dragan, Lončar, Ljiljana, Kačarević, Zoran, Nikolić, Dragan, "Projektovanje betonskih mešavina za izgradnju Avalskog tornja" in Zbornik radova Građevinskog fakulteta, Subotica, no. 16 (2007):115-120,
https://hdl.handle.net/21.15107/rcub_rims_65 .

TY  - JOUR
AU  - Janković, Ksenija
AU  - Bojović, Dragan
AU  - Lončar, Ljiljana
AU  - Kačarević, Zoran
PY  - 2007
UR  - http://rims.institutims.rs/handle/123456789/64
AB  - U radu su navedeni materijali koji se mogu koristiti za spravljanje peno-betona. Prikazana su najvažnija svojstva peno-betona. Takođe, dati su i rezultati sopstvenih istraživanja.
AB  - In this paper materials which can be ingredients for foam concrete are given The most important properties of foam concrete are presented. Also, the results of our own investigation are shown.
PB  - Univerzitet u Novom Sadu - Građevinski fakultet, Subotica
T2  - Zbornik radova Građevinskog fakulteta, Subotica
T1  - Neka svojstva peno-betona
T1  - Some properties of foam concrete
EP  - 114
IS  - 16
SP  - 109
UR  - https://hdl.handle.net/21.15107/rcub_rims_64
ER  - 

@article{
author = "Janković, Ksenija and Bojović, Dragan and Lončar, Ljiljana and Kačarević, Zoran",
year = "2007",
abstract = "U radu su navedeni materijali koji se mogu koristiti za spravljanje peno-betona. Prikazana su najvažnija svojstva peno-betona. Takođe, dati su i rezultati sopstvenih istraživanja., In this paper materials which can be ingredients for foam concrete are given The most important properties of foam concrete are presented. Also, the results of our own investigation are shown.",
publisher = "Univerzitet u Novom Sadu - Građevinski fakultet, Subotica",
journal = "Zbornik radova Građevinskog fakulteta, Subotica",
title = "Neka svojstva peno-betona, Some properties of foam concrete",
pages = "114-109",
number = "16",
url = "https://hdl.handle.net/21.15107/rcub_rims_64"
}

Janković, K., Bojović, D., Lončar, L.,& Kačarević, Z.. (2007). Neka svojstva peno-betona. in Zbornik radova Građevinskog fakulteta, Subotica
Univerzitet u Novom Sadu - Građevinski fakultet, Subotica.(16), 109-114.
https://hdl.handle.net/21.15107/rcub_rims_64

Janković K, Bojović D, Lončar L, Kačarević Z. Neka svojstva peno-betona. in Zbornik radova Građevinskog fakulteta, Subotica. 2007;(16):109-114.
https://hdl.handle.net/21.15107/rcub_rims_64 .

Janković, Ksenija, Bojović, Dragan, Lončar, Ljiljana, Kačarević, Zoran, "Neka svojstva peno-betona" in Zbornik radova Građevinskog fakulteta, Subotica, no. 16 (2007):109-114,
https://hdl.handle.net/21.15107/rcub_rims_64 .