基于高掺量粉煤灰再生混凝土性能试验研究

Experimental search on properties of recycled concrete based on high-volume fly ash

通过以再生粗骨料等质量取代天然粗骨料,以粉煤灰按照0、10%、20%、30%、40%的比例掺量等量取代水泥,利用均匀设计法制定了5组试验方案,配制强度等级为C30的再生混凝土。对其流动性和抗压强度进行试验,并进行线性回归分析,研究粉煤灰掺量对再生混凝土流动性和抗压强度的影响规律,确定满足工程技术要求的再生混凝土最优配合比。

By replacing natural aggregate with recycled coarse aggregate of the same quality and cement with the same volume of fly ash according to the 0,10% ,20% ,30% ,40%, we set up 5 groups of test plan by using uniform design method and made up the recycled concrete with strength grade of C30. By studying the fluidity and compressive strength and analyzing linear regression, it studied the effect law of fly ash on fluidity and compressive strength of recycled concrete and determined the optimal mixture ratio to meet the engi- neering requirements.