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

Korea Concrete Institute (한국콘크리트학회)
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Setting Properties of Concrete with the Combination of Mineral and Chemical Admixture

광물질혼화재와 화학혼화제의 조합사용에 따른 콘크리트의 응결특성

  • 김종 ((주)선엔지니어링 건설기술연구소, 청주대학교 대학원) ;
  • 송승헌 (삼성물산(주) 건설부문, 청주대학교 대학원) ;
  • 전충근 ((주)선엔지니어링 건설기술연구소) ;
  • 한민철 (청주대학교 산업과학연구소) ;
  • 오선교 ((주)선엔지니어링 건설기술연구소) ;
  • 한천구 (청주대학교 건축공학부)
  • Published : 2004.11.01
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Abstract

This paper investigated the setting and compressive strength of concrete with the combination of mineral and chemical admixture. According to test results, plain concrete with high early strength development type AE water reducing agent(HEAEWRA) and $10\%$ of CKD respectively had earlier setting time than concrete with AE water reducing agent by $0.5\~1.5$ hours. Setting time of concrete with retarding type AE water reducing agent(RAEWRA) and FA $30\%$, BS $60\%$ respectively retarded by as much as $4\~7.5$ hours compared with plain concrete. Plain concrete with HEA WRA, $10\%$ of CKD and RAEWRA had higher strength than that of AE water reducing agent by as much as 5MPa at 28days. From the result of the paper, it is found that the combination of mineral admixture and setting accelerating or retarding agent can reduce the hydration heat cracks by setting time difference and hydration heat reduction effects.

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