再生混凝土抗压强度试验研究

设计3种不同再生骨料取代率的再生混凝土立方体试件，分别在7 d、14 d、28 d、100 d龄期进行抗压强度试验，结果表明：长龄期再生混凝土立方体抗压强度有所增大，但高取代率比低取代率的抗压强度降低，再生混凝土后期强度增长速率高于普通混凝土。对试验室实测的再生混凝土立方体抗压强度与试验龄期进行拟合，拟合结果相关系数均大于0.97，吻合结果较好。

Experimental study on compressive strength of recycled concrete

Three kinds of concrete cube specimens with different replacement rates of recycled concrete were designed, and the compressive strength tests were carried out at 7 d, 14 d, 28 d and 100 d age respectively.The results show that the compressive strength of recycled concrete at long age increases, and the compressive strength decreases when the replacement rate is higher than that of low replacement rate, and the growth rate of the later strength of recycled concrete is higher than that of ordinary concrete. The experimental results of recycled concrete cube compressive strength and test age were fitted, and the correlation coefficients of fitting results were greater than 0.97, and the results were in good agreement.