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Evaluation of Concrete Material Properties for Pavement Using Job-site Processed Recycled Aggregates

현장재생골재를 사용한 포장용 콘크리트의 기본 물성실험

  • 양성철 (홍익대학교 건축공학부) ;
  • 김남호 (한국기술교육대학교 건축공학부)
  • Received : 2013.01.18
  • Accepted : 2013.03.26
  • Published : 2013.04.15

Abstract

PURPOSES : This study was performed to investigate a feasibility of job-site use of recycled concrete aggregate exceeding 3% of absorption rate. Test variables are coarse aggregate types such as natural aggregate, job-site processed recycled aggregate, and recycled aggregate processed from the intermediate waste treatment company. METHODS : First, aggregate properties such as gradation, specific gravity and absorption rate were determined. Next a basic series of mechanical properties of concrete was tested. RESULTS : All strength test results such as compression, flexure and modulus were satisfied for the minimum requirements. Finally up to first 48 elapsed days the shrinkage strains of concretes made from both recycled aggregates (in case of volume-surface ratio of 300) appeared to be greater than 26% of the companion concretes made from natural aggregates. CONCLUSIONS : Drying shrinkage result is ascribed to greater absorption rate and specific gravity of those specimens made from recycled aggregate. This may be reduced with an addition of admixtures.

Keywords

References

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