TY - JOUR
T1 - Valorization of waste perlite powder in geopolymer composites
AU - El-Mir, Abdulkader
AU - Hwalla, Joud
AU - El-Hassan, Hilal
AU - Assaad, Joseph J.
AU - El-Dieb, Amr
AU - Shehab, Ehab
N1 - Funding Information:
The authors acknowledge the financial support provided by ASPIRE and UAEU under grant 21N235. The support of the UAEU lab engineers and staff is highly appreciated.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/3/3
Y1 - 2023/3/3
N2 - The utilization of industrial waste by-products including blast furnace slag (BFS) for geopolymer (GP) production gained considerable attention in recent years. Yet, the development, characterization, and optimization of this kind of material in the presence of waste perlite powder (WPP) has not been investigated. This study assesses the effect of binder content, WPP replacement rate, alkaline activator-to-binder ratio (s/b), and sodium silicate-to-sodium hydroxide ratio (S/H) on the fresh, mechanical, and durability performance of GP mortars blended with BFS and WPP precursors. The optimum proportions determined using the multicriteria Taguchi method were found to contain 600 kg/m3 binder content, 25 % WPP replacement rate, 0.60 s/b, and 2.0 S/H. The reaction kinetics and morphology of precipitated compounds, including the scanning electron microscopy and energy dispersive X-ray analysis, highlighted the rate of activating the calcium aluminosilicate gels and dense microstructure of the optimum mixture. Such data can be of particular interest to researchers and engineers seeking to valorize the use of industrial wastes in GP applications.
AB - The utilization of industrial waste by-products including blast furnace slag (BFS) for geopolymer (GP) production gained considerable attention in recent years. Yet, the development, characterization, and optimization of this kind of material in the presence of waste perlite powder (WPP) has not been investigated. This study assesses the effect of binder content, WPP replacement rate, alkaline activator-to-binder ratio (s/b), and sodium silicate-to-sodium hydroxide ratio (S/H) on the fresh, mechanical, and durability performance of GP mortars blended with BFS and WPP precursors. The optimum proportions determined using the multicriteria Taguchi method were found to contain 600 kg/m3 binder content, 25 % WPP replacement rate, 0.60 s/b, and 2.0 S/H. The reaction kinetics and morphology of precipitated compounds, including the scanning electron microscopy and energy dispersive X-ray analysis, highlighted the rate of activating the calcium aluminosilicate gels and dense microstructure of the optimum mixture. Such data can be of particular interest to researchers and engineers seeking to valorize the use of industrial wastes in GP applications.
KW - Blast furnace slag
KW - Geopolymer mortar
KW - Optimization
KW - Performance evaluation
KW - Taguchi
KW - Waste perlite powder
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U2 - 10.1016/j.conbuildmat.2023.130491
DO - 10.1016/j.conbuildmat.2023.130491
M3 - Article
AN - SCOPUS:85147253080
SN - 0950-0618
VL - 368
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 130491
ER -