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

Korea Concrete Institute (한국콘크리트학회)
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Execution of Mass Concrete for Mat Foundation Using Setting Time Difference with Super Retarding Agent for Reducing Hydration Heat

초지연제의 응결시간차 공법을 이용한 기초 매트 콘크리트의 수화열 저감 시공

  • 전충근 ((주)선엔지니어링 종합건축사사무소 기술연구소) ;
  • 윤치환 ((주)두성기업) ;
  • 송승헌 (삼성건설, 청주대학교 대학원) ;
  • 신동안 ((주)선엔지니어링 종합건축사사무소 기술연구소) ;
  • 오선교 ((주)선엔지니어링 종합건축사사무소) ;
  • 한천구 (청주대 건축공학부)
  • Published : 2004.05.01
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Abstract

In this paper, field application of mass concreting using super retarding agent(SRA) are discussed based on setting. time difference with SRA in big discount market in Chongju. Mechanical and physical properties of .concrete are investigated. Temperature history of concrete is also measured. Slump and air content meet the requirement of target value. Compressive strength of concrete exceeded the nominal strength with 24MPa. Compressive strength of SRA concrete is higher than that of plain concrete by about $3\~4\%$. For temperature history, peak temperature of concrete at middle section at top concrete layer reached $49.6^{\circ}C$ within 24hours, and at bottom concrete layer, $54.6^{\circ}C$ within 42hours. Based on the naked eye's observation, no crack was found at mass concrete.

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