Field Application of the Mass Concrete Using Insulation Curing Method with Double Bubble Sheets Subject to Cold Weather

이중버블시트를 이용한 단열보온양생공법의 한중매스콘크리트 현장적용

  • 이동규 (청주대학교 건축공학부) ;
  • 김종 ((주)선엔지니어링종합건축사사무소) ;
  • 김기훈 (아세아시멘트(주) 연구개발팀) ;
  • 황인성 (아세아시멘트(주) 연구개발팀) ;
  • 한민철 (청주대학교 건축공학부) ;
  • 한천구 (청주대학교 건축공학부)
  • Published : 2007.04.28

Abstract

This study investigated the applicability of insulation curing method with double layer bubble sheets to the man concrete subjected to cold weather. Temperature history of the mass concrete indicated that the highest temperature of center section was exhibited at $34^{\circ}C$ while the that of surface section was $25^{\circ}C$. Difference between center and surface was shown to be less $10^{\circ}C$ when the temperature of center section was peak section, and thereby associated temperature cracking index was calculated 1.5, and occurrence probability of temperature cracking was 5%, so there was no temperature cracking caused by internal restraint. No temperature crack was observed by naked eye. It was clear that early frost demage and temperature cracking could be restrained due to reducing temperature difference between inner part and outside in the case double bubble sheets applied to insulation curing method in cold weather. The maturity of mass concrete is higher than outside about $72\sim89^{\circ}$ DD, so it was demonstrated to prevent early frost demage and ensure strength excellently. Insulation curing method with double bubble sheets was more economic than heating curing method.

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