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Engineering characteristics of FA substituted concrete were analyzed in this study using admixture of FC and RP for the purpose of improving initial strength of FA concrete. First in fresh concrete, slump and air capacity satisfied objective range in all mixes of the mix design. Setting time was significantly reduced in comparison to FA substituted concrete by using performance improvement admixture. The time reached the level of plain mix under low temperature condition. As a characteristic of hardened concrete, compressive strength was high in the initial age and age of 28 days when performance improvement admixture was used in comparison to FA mix. Especially at high temperature, strength was similar to the plain mix. Satisfactory improvement in strength was verified. In case of rate of change in length from drying shrinkage, use of performance improvement admixture showed no large difference from FA mix. Synthesizing the above results, use of performance improvement admixture composed of 30% FA, FC (15% of mix) and RP (5% of mix) is expected to bring satisfactory acceleration of setting and improvement of strength regardless of curing temperature.

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Abstract
1. 서론
2. 실험계획 및 방법
3. 실험결과 및 분석
4. 결론
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UCI(KEPA) : I410-ECN-0101-2010-540-001643134