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Title |
Alkali-Activated Coal Ash (Fly Ash, Bottom Ash) Artificial Lightweight Aggregate and Its Application of Concrete
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Keywords |
알칼리 활성화; 플라이애쉬; 바텀애쉬; 인공경량골재; 역학적 특성; alkali activation; fly ash; bottom ash; artificial lightweight aggregate; mechanical property |
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Abstract |
Artificial lightweight aggregates and solids were manufactured with coal ash(fly ash, bottom ash). In order to apply alkali-activated coal ash(fly ash, bottom ash) artificial lightweight aggregate to concrete, several experimental studies were performed. Thus, it can be noticed the optimal mix proportion, basic characteristies, mechanical properties and environmental safety of alkali-activated coal ash(fly ash, bottom ash) solid and alkali-activated coal ash(fly ash, bottom ash) artificial lightweight aggregate. Also, the freezing-thawing test property of concrete using the alkali-activated coal ash(fly ash, bottom ash) artificial lightweight aggregate was investigated. As a result, the optimal mixing proportion of coal ash(fly ash, bottom ash) solid to make alkali-activated artificial lightweight aggregates was cement 10%, water glass 15%, NaOH 10%, MnO₂ 5%. Alkali-activated coal ash(fly ash, bottom ash) solid can achieve compressive strength of 36.4 MPa, at 7-days, after the paste was cured at air curing after moist curing during 24 hours in 50℃. Alkali-activated coal ash(fly ash, bottom ash) artificial lightweight aggregate that do impregnation to polymer was improved 10% crushing strength 150%, and was available to concrete.
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