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Title |
Effect of Curing Conditions on the Strength of Fly-Ash Based Geopolymer
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DOI |
https://doi.org/10.4334/JKCI.2014.26.4.449 |
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Keywords |
플라이애쉬 ; 지오폴리머 ; 양생온도 ; 전양생시간 ; 양생시간 fly ash ; geopolymer ; curing temperature ; preset time ; curing time |
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Abstract |
Material properties of geopolymer, whose the reaction is very complicated, have been influenced by chemical compositions and particle size distributions of fly ash, concentrations and types of alkali-activators and curing conditions such as temperatures and time. In this research, experiments with several variables such as curing temperatures, preset prior to the high temperature curing and high temperatures have been conducted in order to evaluate to investigate effects on the compressive strengths of geopolymer caused by curing condition. Experiment results were evaluated with compressive strengths and micro-structures such as SEM and MIP of geopolymer pastes. As a result, as higher curing temperature or longer preset time were applied to the pastes, higher compressive strengths were observed. However, compressive strengths of geopolymer pastes declined due to increases in macropores (>50 nm) under high temperatures elapsed after 24 hours. In this sense, it can be considered that strengths and microstructures of geopolymers depends on curing temperature and time.
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