And Experimetal Study for Concrete Strength Prediction by Maturity Concept

성숙도 개념을 이요한 콘크리트의 강도예측을 위한 실험적 연구

  • 유청호 (강원대학교 토목공학과) ;
  • 이주형 (강원대학교 토목공학과) ;
  • 김태경 (성덕전문대학 토목공학과) ;
  • 윤경구 (한국도로공사 콘크리트포장연구실) ;
  • 박제선 (강원대학교 토목공학과)
  • Published : 1997.10.01

Abstract

The maturity concept was adopted to predict the strength of concrete, which was subjected to same temperature conditions and variable curing conditions. Penetration test and compressive test were conducted to measure the initial and final setting time and the compressible strength of concrete specimen, respectively. Also, the temperature and time were recorded at some intervals of time for calculating the maturity. The initial and final setting were delayed as the w/c ratio increased and curing temperature decreased. The activating energy decreased as the w/c ratio increased. The relationships at the relative strength and the maturity were proposed at different w/c ratio for the same temperature curing condition, and these were applied for the variable curing conditions. The results indicated that the difference between the strength of the proposed and the specimen was big at 1 days's age but quite similar after 3 day's age.

Keywords