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학술저널
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대한건축학회 대한건축학회 논문집 - 구조계 大韓建築學會論文集 構造系 第18卷 第12號
발행연도
2002.12
수록면
91 - 96 (6page)

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Generally, when using the fly-ash as replacement material of cement content in concrete, it might be occur retardation of setting time and hardening. So, it is difficult to use large amount of fly-ash as a part of cement content. However, if it is used as replacement material of fine aggregate in concrete, it might be used a large amount of fly-ash in concrete and settled a problem for exhaustion of natural-aggregate resources. Furthermore, it was reported that compressive strength of HVFAC(High Volume Fly-Ash Concrete) using the fly-ash as a part of fine aggregate is higher than that of plain concrete. But, the larger the fly-ash is replaced, the more the fluidity of HVFAC decrease, because porous organization of fly-ash which is bone-dry state absorbs water content.
This is an experimental study to compare and analyze the fluidity and strength properties of mortar using the fly-ash as replacement material of fine aggregate by addition water content of fly-ash(W<SUB>FA</SUB>). For this purpose, the mix proportion of mortar excepted coarse aggregate from base concrete according to the replacement ratio of fly-ash(0, 20, 40, 60, 80, 100% by sand volume) and addition water content of fly-ash(W<SUB>FA</SUB> : 22, 25, 28, 31, 34%) was selected, and then tests for flow and compressive strength were performed to find proper W<SUB>FA</SUB> which satisfy fluidity and strength.
According to test results, it was found that the fluidity of mortar with W<SUB>FA</SUB> 25%, 28% was similar to that of plain mortar. And in case of W<SUB>FA</SUB> 25%, the effect of addition water content on the strength loss of mortar was smaller than any other.

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Abstract
1. 서론
2. 실험계획 및 방법
3. 실험결과 및 고찰
4. 결론
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