混杂纤维混凝土拌合物工作性能试验研究

通过CF40,CF50,CF60混杂纤维混凝土拌合物的工作性能试验,研究了钢纤维体积分数和聚丙烯纤维掺量对不同强度混杂纤维混凝土拌合物的影响.试验中,钢纤维体积分数为0.0%,0.5%,1.0%,1.5%,2.0%,聚丙烯纤维掺量为0.0,0.6,0.9,1.2 kg/m3,并考虑包裹钢纤维的水泥浆厚度为1.0 mm.结果表明:CF40,CF50混杂纤维混凝土拌合物的坍落度呈现出随钢纤维体积分数增大而降低的变化规律,CF60混杂纤维混凝土拌合物的坍落度呈现出随钢纤维体积分数增大而先降后增再降的变化规律;在钢纤维体积分数不变时,随着聚丙烯纤维体积分数的增大,混杂纤维混凝土拌合物的坍落度降低.

Experimental Research of Working Performance of Hybrid Fiber Reinforced Concrete Mixture

By the working performance experiments of Hybrid Fiber Reinforced Concrete(HFRC) with the strength grades of CF40,CF50 and CF60,the effects of the volume fraction of steel fiber and the contents of polypropylene fiber on the slumps of HFRC were studied.In the test,the volume fraction of steel fiber was 0.0%,0.5%,1.0%,1.5% and 2.0%,the contents of polypropylene fiber were 0.0 kg/m3,0.6 kg/m3,0.9 kg/m3 and 1.2 kg/m3,and the thickness of steel fiber wrapped slurry was considered as 1.0 mm.The results showed that with the increasing in the volume fraction of steel fiber,the slump of HFRC with grades of CF40,CF50 decreased,but the one of HFRC with the grade of CF60 decreased at first,then increased,and decreased eventually.The results also indicated that the slump of HFRC mixture decreased with the increasing in the content of polypropylene fiber when the volume fraction of steel fiber was constant.