Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Properties of Early Strength Development according to the Replacing Method of Admixture of Concrete Using AE Water Reducing Agent of Early-Strength Type

조기강도 발현형 AE감수제를 사용한 콘크리트의 혼화재 치환방법 변화에 따른 초기 강도발현 특성

  • 황인성 (청주대학교 대학원) ;
  • 우종완 (청주대학교 대학원) ;
  • 김규동 (삼성물산㈜ 건설부문 기술연구소) ;
  • 이승훈 (삼성물산㈜ 건설부문 기술연구소) ;
  • 한천구 (청주대학교 건축공학부)
  • Published : 2003.11.01
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Abstract

This study is intended to investigate the properties of concrete using AE Water Reducing Agent of Early-Strength Type. According to the results, as for the replacing method of mineral admixture, setting time is shortened faster in order of replacement for fine aggregate, combination and replacement for cement, and when AE Water Reducing Agent of Early-Strength Type is used, it is shortened by about 4 hours, compared with normal AE Water Reducing Agent Compressive strength is lower in the case of replacement for fine aggregate, but higher in the other case than that of plain concrete. And When AE Water Reducing Agent of Early-Strength Type is used, early compressive strength is very high in comparison to normal AE Water Reducing Agent. Early strength development is very favorable by the use of AE Water Reducing Agent of Early-Strength Type regardless of the replacing method of mineral admixture at $20^{\circ}C$, but at $l0^{\circ}C$, it is effective for Early strength development that W/B is lowered to below 45%, BS of 20% is replaced for fine aggregate, and AE Water Reducing Agent of Early-Strength Type is used.

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