掺加陈积粉煤灰制备建筑垃圾高强砌块的试验研究

Experimental study of high-strength block with recycled concrete aggregate and fly ash

小型空心砌块(以下简称砌块)已成为建筑空间非承重墙、框架填充墙的主导新型墙材之一。因此,采用陈积粉煤灰和再生混凝土骨料等质量替代部分水泥和机制砂,制备建筑垃圾小型空心砌块,试验结果发现,随着胶凝材料用量的增加,制品的强度和密度也相应提高;当水泥用量达到20%,陈积粉煤灰用量在5%、10%时,砌块强度大于10.0 MPa。试验结果表明,掺加陈积粉煤灰制备强度大于10 MPa的砌块是可行的。

Small hollow block （referred as block,the same below） is new wall materials for non load walls and frame filled walls. Hence, construction waste small hollow block is prepared with fly ash and recycled concrete aggregate instead of part of cement and ma- chined sand.The results are found that the strength and density of small hollow blocks increased with the increase of dosage of cementitious materials.The strength is greater than 10.0 MPa when the amount of cement reached 20% and the dosage of fly ash reached 5% or 10%. Test results show it is feasible that the strength of construction waste small hollow block is re＇eater than 10.0 MPa.