An Experimental Study on the Durability of Recycled Aggregate Concrete

재생골재 콘크리트의 내구특성에 관한 실험적 연구

  • Seo Chi-Ho (Dept. of Architecture Engineering Konkuk University) ;
  • Kim Byung-Yun (Dept. of Architecture Engineering Konkuk University)
  • 서치호 (건국대학교 건축대학 건축공학과) ;
  • 김병윤 (건국대학교 건축대학 건축공학과)
  • Published : 2005.06.01


The object of this study is to prove the quality and reliability of recycled aggregate concrete by finding a way to improve the durability of the material through the experiment on the accelerated carbonation, freezing and thaw, and drying shrinkage, analysing the influence on the durability to Promote more active use of recycled aggregate concrete. The result of study as follows. (1) Resistibility to the freeze and thaw of the recycled aggregate concrete showed relative dynamic modulus of elasticity over $90\%$ which is very good, and all cycles show $99.2{\~}91.0\%$ dynamic modulus of elasticity which is improved compared with the $97.5{\~}90.6\%$ relative dynamic modulus of elasticity of ordinary concrete made of broken stone. (2) Carbonated thickness of the recycled aggregate concrete and the normal concrete was similar or it appeared with the tendency which it diminishes more or less. (3) Length change rate in drying contraction of the recycled aggregate concrete made of the recycled aggregate was lower than the ordinary concrete made of the broken stone by $18.5{\~}3.9\%$ in all blending.


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