초기동해를 입은 콘크리트의 압축강도에 미치는 영향인자에 관한 연구

A Study of Influencing Factors on Compressive Strength of Concrete Frozen at Early Ages

  • 배수원 (한국과학기술원 건설 및 환경공학과) ;
  • 김진근 (한국과학기술원 건설 및 환경공학과) ;
  • 권기주 (한국전력공사 전력연구원) ;
  • 정원섭 (전력연구원)
  • 발행 : 2003.11.01

초록

When fresh concrete is exposed to sufficiently low temperature, the free water in the concrete is cooled below its freezing point and transforms into ice, which causes decrease in compressive strength of concrete. Of the many influencing factors on the loss of compressive strength, the age of concrete at the beginning of freezing, water-cement ratio, and cement-type are significantly important. The objective of this study is to examine how the these factors affect the compressive strength of concrete frozen at early ages. The results from the tests showed that as age at the beginning of freezing is delayed and water-cement ratio is low, the loss of compressive strength decreases. In addition, concrete made with high-early-strength cement is less susceptible to frost damage than concrete made with ordinary portland cement.

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