TY  - JOUR
AU  - Arsenović, Milica
AU  - Radojević, Zagorka
AU  - Jakšić, Željko
AU  - Pezo, Lato
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/286
AB  - The objective of this study was to investigate utilization potential of organic and inorganic industrial wastes in clay bricks. Mineral composition of starting heavy clay sample is tested using an X-ray diffractometer. Chemical content and loss on ignition were determined in sludges, coal dust, fly and landfill ashes, soybean crust, sawdust, sunflower hulls and their ash. Different ratios of wastes were added to heavy clay, while the applied firing temperatures were in the range 850-1000 degrees C. The laboratory samples (tiles, solid bricks and hollow blocks) were tested by using the standard test methods. Changes in product's quality were studied in terms of relative differences to ceramic-technological parameters compared to samples without waste materials addition. It is noticed that all of the additives increased weight loss, firing shrinkage and water absorption, while decreasing compressive strength and volume mass. The greatest changes in performances were observed with addition of organic materials, whereas, among them, sunflower hulls initiated the lowest compressive strength. Inorganic additives introduced fewer changes to fired products, while fly ash caused the lowest decrease in compressive strength. Response Surface Methodology (RSM) was applied and Second Order Polynomial models (SOP) were used to show the effects of firing temperature, waste materials addition and their quantity on characteristics of fired products. High prediction accuracy was obtained, with coefficient of determination in the range of 0.896-0.999. It was concluded that all of the analyzed materials can generally be used in building bricks by taking advantage of low cost and environmental protection, whereby thermal conductivity decreases.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Mathematical approach to application of industrial wastes in clay brick production - Part I: Testing and analysis
EP  - 4898
IS  - 3
SP  - 4890
VL  - 41
DO  - 10.1016/j.ceramint.2014.12.051
ER  - 

@article{
author = "Arsenović, Milica and Radojević, Zagorka and Jakšić, Željko and Pezo, Lato",
year = "2015",
abstract = "The objective of this study was to investigate utilization potential of organic and inorganic industrial wastes in clay bricks. Mineral composition of starting heavy clay sample is tested using an X-ray diffractometer. Chemical content and loss on ignition were determined in sludges, coal dust, fly and landfill ashes, soybean crust, sawdust, sunflower hulls and their ash. Different ratios of wastes were added to heavy clay, while the applied firing temperatures were in the range 850-1000 degrees C. The laboratory samples (tiles, solid bricks and hollow blocks) were tested by using the standard test methods. Changes in product's quality were studied in terms of relative differences to ceramic-technological parameters compared to samples without waste materials addition. It is noticed that all of the additives increased weight loss, firing shrinkage and water absorption, while decreasing compressive strength and volume mass. The greatest changes in performances were observed with addition of organic materials, whereas, among them, sunflower hulls initiated the lowest compressive strength. Inorganic additives introduced fewer changes to fired products, while fly ash caused the lowest decrease in compressive strength. Response Surface Methodology (RSM) was applied and Second Order Polynomial models (SOP) were used to show the effects of firing temperature, waste materials addition and their quantity on characteristics of fired products. High prediction accuracy was obtained, with coefficient of determination in the range of 0.896-0.999. It was concluded that all of the analyzed materials can generally be used in building bricks by taking advantage of low cost and environmental protection, whereby thermal conductivity decreases.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Mathematical approach to application of industrial wastes in clay brick production - Part I: Testing and analysis",
pages = "4898-4890",
number = "3",
volume = "41",
doi = "10.1016/j.ceramint.2014.12.051"
}

Arsenović, M., Radojević, Z., Jakšić, Ž.,& Pezo, L.. (2015). Mathematical approach to application of industrial wastes in clay brick production - Part I: Testing and analysis. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(3), 4890-4898.
https://doi.org/10.1016/j.ceramint.2014.12.051

Arsenović M, Radojević Z, Jakšić Ž, Pezo L. Mathematical approach to application of industrial wastes in clay brick production - Part I: Testing and analysis. in Ceramics International. 2015;41(3):4890-4898.
doi:10.1016/j.ceramint.2014.12.051 .

Arsenović, Milica, Radojević, Zagorka, Jakšić, Željko, Pezo, Lato, "Mathematical approach to application of industrial wastes in clay brick production - Part I: Testing and analysis" in Ceramics International, 41, no. 3 (2015):4890-4898,
https://doi.org/10.1016/j.ceramint.2014.12.051 . .

TY  - JOUR
AU  - Arsenović, Milica
AU  - Radojević, Zagorka
AU  - Jakšić, Željko
AU  - Pezo, Lato
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/275
AB  - The effects of organic and inorganic waste sludges, coal dust, fly and landfill ashes, soybean crust, sawdust, sunflower flakes and their ash addition to representative heavy clay were investigated. Changes introduced to shaping moist (SM), shrinkage (Delta Sk) and weight loss (Delta Gk) in Bigot's curve critical point, and plasticity coefficient (PC) by Pfefferkorn were studied. The highest sensitivity to drying showed samples with coal dust addition, while the greatest plasticity and shaping moist was detected in samples with 50 wt% of fly and landfill ashes. The influence of waste material used, its' content and also firing temperature were independent parameters that influenced compressive strength, water absorption, firing shrinkage, weight loss during firing and volume mass as dependent parameters. Second order polynomial mathematical models predicted fired products characteristics, and Were later used to determine the optimum conditions by Response Surface Method (RSM), coupled with Fuzzy Synthetic Evaluation algorithm (FSE), using trapezoidal function. The choice of the parameters optimal interval that characterized fired products (water absorption, compressive strength, weight loss during firing, firing shrinkage and volume mass), depended on a final usage of the raw material in heavy clay brick industry. The optimization results showed that sunflower hulls, wood sawdust, soybean husks and saturation sludge are best to be used in solid bricks production. Coal dust, landfill ashes and neutralization (inorganic) sludges are best to be used in hollow bricks production. Sunflower hulls ash can be added in higher quantity to heavy clay to produce blocks or in lower quantity in roof tiles. Fly ashes addition of 50 wt% allows roof tiles production. The optimal temperature for solid bricks and hollow blocks production is found to be 900-950 degrees C.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Mathematical approach to application of industrial wastes in clay brick production-Part II: Optimization
EP  - 4905
IS  - 3
SP  - 4899
VL  - 41
DO  - 10.1016/j.ceramint.2014.12.050
ER  - 

@article{
author = "Arsenović, Milica and Radojević, Zagorka and Jakšić, Željko and Pezo, Lato",
year = "2015",
abstract = "The effects of organic and inorganic waste sludges, coal dust, fly and landfill ashes, soybean crust, sawdust, sunflower flakes and their ash addition to representative heavy clay were investigated. Changes introduced to shaping moist (SM), shrinkage (Delta Sk) and weight loss (Delta Gk) in Bigot's curve critical point, and plasticity coefficient (PC) by Pfefferkorn were studied. The highest sensitivity to drying showed samples with coal dust addition, while the greatest plasticity and shaping moist was detected in samples with 50 wt% of fly and landfill ashes. The influence of waste material used, its' content and also firing temperature were independent parameters that influenced compressive strength, water absorption, firing shrinkage, weight loss during firing and volume mass as dependent parameters. Second order polynomial mathematical models predicted fired products characteristics, and Were later used to determine the optimum conditions by Response Surface Method (RSM), coupled with Fuzzy Synthetic Evaluation algorithm (FSE), using trapezoidal function. The choice of the parameters optimal interval that characterized fired products (water absorption, compressive strength, weight loss during firing, firing shrinkage and volume mass), depended on a final usage of the raw material in heavy clay brick industry. The optimization results showed that sunflower hulls, wood sawdust, soybean husks and saturation sludge are best to be used in solid bricks production. Coal dust, landfill ashes and neutralization (inorganic) sludges are best to be used in hollow bricks production. Sunflower hulls ash can be added in higher quantity to heavy clay to produce blocks or in lower quantity in roof tiles. Fly ashes addition of 50 wt% allows roof tiles production. The optimal temperature for solid bricks and hollow blocks production is found to be 900-950 degrees C.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Mathematical approach to application of industrial wastes in clay brick production-Part II: Optimization",
pages = "4905-4899",
number = "3",
volume = "41",
doi = "10.1016/j.ceramint.2014.12.050"
}

Arsenović, M., Radojević, Z., Jakšić, Ž.,& Pezo, L.. (2015). Mathematical approach to application of industrial wastes in clay brick production-Part II: Optimization. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(3), 4899-4905.
https://doi.org/10.1016/j.ceramint.2014.12.050

Arsenović M, Radojević Z, Jakšić Ž, Pezo L. Mathematical approach to application of industrial wastes in clay brick production-Part II: Optimization. in Ceramics International. 2015;41(3):4899-4905.
doi:10.1016/j.ceramint.2014.12.050 .

Arsenović, Milica, Radojević, Zagorka, Jakšić, Željko, Pezo, Lato, "Mathematical approach to application of industrial wastes in clay brick production-Part II: Optimization" in Ceramics International, 41, no. 3 (2015):4899-4905,
https://doi.org/10.1016/j.ceramint.2014.12.050 . .