低强再生碎砖混凝土力学性能试验研究

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTY OF RECYCLED BRICKBAT AGGREGATE CONCRETE

通过对4组不同配合比的低强再生碎砖混凝土试块进行力学试验,试验结果表明:粉煤灰采用等量取代的方式掺入能改善混凝土的和易性但对强度会有较大的影响,且在一定的范围内,其掺量与抗压强度的下降幅度基本相等;低强再生碎砖混凝土的应力-应变曲线与普通混凝土相似,但其弹性模量不能直接套用普通混凝土的经验计算公式。

Based on the mechanical experimentation to 4 groups of different mixing proportion of lowstrength recycled brickbat aggregate concrete block, the results show that ： the workability of concrete in-corporated with fly ash is improved, but the strength is greatly reduced, and the reduce range of com-pressive strength is mostly equal to the amount of incorporation of the fly ash; The stress strain curve＇ sshape of low strength recycled brickbat aggregate concrete is similar to that of normal concrete, but the e-lasticity modulus＇ calculation formula that applied to normal concrete is not applicable for the recycledbrickbat aggregate concrete.