Research on the Influence of Recycled Aggregate Substitution Rate on Concrete Performance
According to the characteristics of recycled aggregate,different substitution rates were designed in this paper.The effects of the sub-stitution rates of recycled aggregate on the performance of C40 recycled aggregate concrete were studied from the aspects of mix ratio,slump,compressive strength,apparent density and bleed rate.The results show that the regenerated aggregate has high water absorption and should be pre-wet before use.The concrete performance is better when the single-doped replacement rate of recycled coarse aggregate is less than 70%and the single-doped replacement rate of recycled fine aggregate is less than 50%.When mixed,the regenerated coarse aggregate replacement rate should not exceed 50%,and the regenerated fine aggregate replacement rate should not exceed 30%.
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