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Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash

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2019
371.pdf (1.041Mb)
Authors
Terzić, Anja
Pezo, Lato
Miličić, Ljiljana
Mijatović, Nevenka
Radojević, Zagorka
Radulović, Dragan
Andrić, Ljubiša
Article (Published version)
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Abstract
Mineral additives are extensively applied as cement replacement materials in both construction concrete and mortar. Fly ash is one of the most commonly utilized additives which improve Theological properties, as well as thermal and mechanical behavior of mortar, and as such it has been widely investigated. This industrial byproduct comprises heavy metals in its composition; therefore further research is needed to optimize its effective dosage. Moreover, certain sorptive clays, such as natural zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. Ten experimental mortars are prepared with Portland cement, river sand and addition of fly ash, zeolite and/or bentonite in accordance with chemometric experimental design rules. The aim of the study was to investigate the effect of mineral additives on thermal and mechanical performances of mortar. Thermal characteristics were monitored via dilatometric analysis and DTA method. Pri...ncipal component analysis was used on the results of physico-mechanical testing (workability, bulk density, water absorption, shrinkage, compressive and flexural strength) to enable the divisions of the observed samples into groups in the factor space. The performance of Artificial Neural Network was compared with the experimental data in order to develop rapid and accurate method for prediction of mechanical parameters of mortar. The ANN model showed high overall prediction accuracy (r(2) = 0.989, during training cycle). The test results indicate that incorporation of the mineral additives gave cost effective mortars with sufficiently good properties. However, tools of analytical modeling highlighted mortar with zeolite and fly ash as the optimal composition regarding its mechanical performance.

Keywords:
SEM / DTA / Dilatometry / Construction composites / Analytical modeling
Source:
Science of Sintering, 2019, 51, 1, 39-56
Publisher:
  • Međunarodni Institut za nauku o sinterovanju, Beograd
Funding / projects:
  • Development and application of multifunctional materials using domestic raw materials in upgraded processing lines (RS-45008)
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)

DOI: 10.2298/SOS1901039T

ISSN: 0350-820X

WoS: 000496247800004

Scopus: 2-s2.0-85069883425
[ Google Scholar ]
9
8
URI
http://rims.institutims.rs/handle/123456789/374
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
Institut za ispitivanje materijala
TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Miličić, Ljiljana
AU  - Mijatović, Nevenka
AU  - Radojević, Zagorka
AU  - Radulović, Dragan
AU  - Andrić, Ljubiša
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/374
AB  - Mineral additives are extensively applied as cement replacement materials in both construction concrete and mortar. Fly ash is one of the most commonly utilized additives which improve Theological properties, as well as thermal and mechanical behavior of mortar, and as such it has been widely investigated. This industrial byproduct comprises heavy metals in its composition; therefore further research is needed to optimize its effective dosage. Moreover, certain sorptive clays, such as natural zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. Ten experimental mortars are prepared with Portland cement, river sand and addition of fly ash, zeolite and/or bentonite in accordance with chemometric experimental design rules. The aim of the study was to investigate the effect of mineral additives on thermal and mechanical performances of mortar. Thermal characteristics were monitored via dilatometric analysis and DTA method. Principal component analysis was used on the results of physico-mechanical testing (workability, bulk density, water absorption, shrinkage, compressive and flexural strength) to enable the divisions of the observed samples into groups in the factor space. The performance of Artificial Neural Network was compared with the experimental data in order to develop rapid and accurate method for prediction of mechanical parameters of mortar. The ANN model showed high overall prediction accuracy (r(2) = 0.989, during training cycle). The test results indicate that incorporation of the mineral additives gave cost effective mortars with sufficiently good properties. However, tools of analytical modeling highlighted mortar with zeolite and fly ash as the optimal composition regarding its mechanical performance.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash
EP  - 56
IS  - 1
SP  - 39
VL  - 51
DO  - 10.2298/SOS1901039T
ER  - 
@article{
author = "Terzić, Anja and Pezo, Lato and Miličić, Ljiljana and Mijatović, Nevenka and Radojević, Zagorka and Radulović, Dragan and Andrić, Ljubiša",
year = "2019",
abstract = "Mineral additives are extensively applied as cement replacement materials in both construction concrete and mortar. Fly ash is one of the most commonly utilized additives which improve Theological properties, as well as thermal and mechanical behavior of mortar, and as such it has been widely investigated. This industrial byproduct comprises heavy metals in its composition; therefore further research is needed to optimize its effective dosage. Moreover, certain sorptive clays, such as natural zeolite and bentonite, can prevent migration of toxic elements from fly ash by immobilizing them in their structure. Ten experimental mortars are prepared with Portland cement, river sand and addition of fly ash, zeolite and/or bentonite in accordance with chemometric experimental design rules. The aim of the study was to investigate the effect of mineral additives on thermal and mechanical performances of mortar. Thermal characteristics were monitored via dilatometric analysis and DTA method. Principal component analysis was used on the results of physico-mechanical testing (workability, bulk density, water absorption, shrinkage, compressive and flexural strength) to enable the divisions of the observed samples into groups in the factor space. The performance of Artificial Neural Network was compared with the experimental data in order to develop rapid and accurate method for prediction of mechanical parameters of mortar. The ANN model showed high overall prediction accuracy (r(2) = 0.989, during training cycle). The test results indicate that incorporation of the mineral additives gave cost effective mortars with sufficiently good properties. However, tools of analytical modeling highlighted mortar with zeolite and fly ash as the optimal composition regarding its mechanical performance.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash",
pages = "56-39",
number = "1",
volume = "51",
doi = "10.2298/SOS1901039T"
}
Terzić, A., Pezo, L., Miličić, L., Mijatović, N., Radojević, Z., Radulović, D.,& Andrić, L.. (2019). Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(1), 39-56.
https://doi.org/10.2298/SOS1901039T
Terzić A, Pezo L, Miličić L, Mijatović N, Radojević Z, Radulović D, Andrić L. Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash. in Science of Sintering. 2019;51(1):39-56.
doi:10.2298/SOS1901039T .
Terzić, Anja, Pezo, Lato, Miličić, Ljiljana, Mijatović, Nevenka, Radojević, Zagorka, Radulović, Dragan, Andrić, Ljubiša, "Thermal and Mechanical Behavior of Composite Mortars Containing Natural Sorptive Clays and Fly Ash" in Science of Sintering, 51, no. 1 (2019):39-56,
https://doi.org/10.2298/SOS1901039T . .

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