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- W4220898889 abstract "The paper discusses the potential of recycled fine powder as an activator in fly ash based geopolymer mortar. In current study, the recycled fine powder was used as partial substitute of fly ash at different replacement levels i.e., 10%, 20%, 30%, 40% and 50%. The sodium hydroxide and sodium silicate solutions were used as an alkaline solution for geopolymer mortar. The alkali/binder ratio of 0.45, sodium hydroxide of 12 molarity, sodium silicate / sodium hydroxide ratio of 2 and water/solid ratio of 0.35 kept constant for all geopolymer mortar mixes. The fresh properties of geopolymer mortar were evaluated in terms of slump flow and setting time. Further, the compressive strength and durability properties were assessed in terms of water absorption, porosity and dry shrinkage for all geopolymer mortar mixes at both ambient and heat curing. The observed results show that up to 30% substitution of recycled fine powder enhances the strength and durability properties of geopolymer mortar mixes. The recycled fine powder shows prominent results for compressive strength at early stage of ambient curing. The microstructure analysis validates the presence of calcium content in recycled fine powder provides additional Na2O–Al2O3–SiO2–H2O / CaO–Al2O3–SiO2–H2O gel with geopolymer matrix and densify the microstructure to enhance all properties of geopolymer mortar." @default.
- W4220898889 created "2022-04-03" @default.
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- W4220898889 date "2022-03-01" @default.
- W4220898889 modified "2023-09-30" @default.
- W4220898889 title "Utilization of recycled fine powder as an activator in fly ash based geopolymer mortar" @default.
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- W4220898889 doi "https://doi.org/10.1016/j.conbuildmat.2022.126581" @default.
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