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Title |
An Experimental Study on the Durability of Recycled Aggregate Concrete
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Keywords |
재생골재 ; 탄산화 ; 건조수축 ; 동결융해 ; 내구성 recycled aggregate ; carbonation resistance ; drying shrinkage ; Freeze and thaw ; Durability |
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Abstract |
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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