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Influence of Mix Factors and Mixing Ratio of Aggregate on the Strength and Water Permeability of Porous Concrete

포러스 콘크리트의 배합요인 및 골재 혼합비율이 강도 및 투수성능에 미치는 영향

  • 김무한 (정회원, 충남대학교 건축학과 교수·공박) ;
  • 김규용 (정회원, 건설성 건축연구소 제 2연구부 무기재료 연구실) ;
  • 백용관 (정회원, 충남대학교 대학원 건축공학과)
  • Published : 2000.12.01

Abstract

Porous concrete having continuous voids is gaining more interest as an ecological material. It has several useful functions such as water and air permeability, sound absorption, etc. Its strengths are considerably lower than those of conventional concrete due to the large and continuous voids in it. This study has been carried out to investigate the influence of mix factors and mixture proportion of aggregate on the strengths and water permeability of porous concrete. And it has been carried out to investigate the evaluation of void of porous concrete by the ultra-sonic pulse velocity. The results f this study are as follows: 1) The theoretical void ratio has greater influence than any other factor on the strengths and water permeability of porous concrete. And it is a little affected by the replacement proportion of silica-fume and mixture proportion of aggregate. 2) Because the coefficients of correlation between the void ratio and ultra-sonic pulse velocity were relatively high, it will be possible that the void ratio is predicted by the ultra-sonic pulse velocity.

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