순환잔골재를 사용한 굳지 않은 콘크리트의 특성

Properties of Fresh Concrete with Recycled fine Aggregates

  • 최기선 (한국건설기술연구원, 건축구조.재료연구실) ;
  • 유영찬 (한국건설기술연구원, 건축구조.재료연구실) ;
  • 윤현도 (충남대학교 건축공학과) ;
  • 김긍환 (한국건설기술연구원, 건축구조.재료연구실)
  • 발행 : 2008.11.07

초록

The objective of this study is to investigate the properties of fresh concrete with recycled fine aggregates. Three different kinds of fine aggregate with natural, high and low quality recycled aggregates were prepared. The concrete mixtures were produced with test parameters of replacement ratio of recycled fine aggregate. The properties of the fresh concrete were measured by means of slump and air content according to elapsed time. Quality control method to maintain the constant total mixing water for recycled aggregate concrete was suggested. The all concrete mixtures were produced with approximately the same slump on the job site after an hour. Test results indicated that compressive strength of the concrete mixtures with constant slump is not affected by the replacement ratio of recycled fine aggregate. Therefore, the practical way for the quality control of recycled aggregate concrete is to maintain the constant total mixing water.

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