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Title |
Mechanical Properties of Recycled Coarse Aggregate concrete using Two-Stage Mixing Approach
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Authors |
권성준(Seung Jun Kwon) ; 임희섭(Hee Seob Lim) ; 이한승(Han Seung Lee) ; 임명관(Myung Kwan Lim) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.4.060 |
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Keywords |
순환 골재 ; NMA ; TSMA ; 압축 강도 ; 순환 골재 콘크리트 recycled aggregate ; NMA ; TSMA ; compressive strength ; recycled aggregate concrete |
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Abstract |
As the lack of specific aggregation intensifies, the development of alternative resources is urgent. Construction waste is increasing every year, but recycled aggregate is used as a low value added material. Various studies are currently underway at the national level. In this paper, the mechanical performance of the concrete according to the concrete mixing method and the replacement amount of the circulating coarse aggregate was compared and evaluated. Concrete mixing method was normal mixing approach(NMA) method, two-stage mixing approach1 (TSMA1) method, two-stage mixing approach2 (TSMA2) method. Fresh concrete was tested for air content, slump test, and unit volume weight. Compressive strength and flexural strength were tested in hardened concrete. According to the TSMA method, the mechanical performance difference of concrete is shown, and the strength is decreased according to the circulating coarse aggregate replacement amount.
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