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Title |
An Experimental Study on the Estimation of Compressive Strength and the Physical Properties of Recycled Aggregate Concrete of Fixed Slump
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Authors |
김상헌(Sang-Heon Kim) ; 전찬수(Chan-Soo Jeon) ; 이세현(Sea-Hyun Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.2.051 |
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Keywords |
순환골재 ; 순환골재콘크리트 ; 순환잔골재 ; 치환율 Recycled aggregate ; Recycled aggregate concrete ; Recycled fine aggregate ; Replacement ratio |
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Abstract |
This study was a basic research for actual production of recycled aggregate concrete, and experiments were carried out on the change of water cement ratio and physical properties of recycled aggregate concrete with fixed slump. Results were as follows. Concrete using recycled aggregate were required increased water to maintain the target slump, and the recycled fine aggregate are necessary more increased water more than the recycled coarse aggregate. The replacement ratio of recycled fine aggregate be less than 60%, would be possible to obtain the air content volume that did not deviate from the concrete quality specification. The compressive strength of concrete using recycled aggregate decreased with increasing the replacement of recycled aggregate, and compressive strength decreased by 25% when 100% recycled fine aggregate were replaced. As a result of analyzing the correlation of compressive strength according to the mixing factors of concrete, it was found that replacement of recycled fine aggregate> water cement ratio> air content volume were influenced in order.
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