聚丙烯纤维增强钢丝网混凝土板抗弯性能试验研究

Experimental research on flexural behavior of PFOC slabs

对67组共201块聚丙烯纤维增强钢丝网混凝土薄板进行了抗弯性能试验,研究了无配筋和有配筋聚丙烯纤维增强钢丝网混凝土薄板在不同开裂状态下的抗弯性能及其影响因素,建立了供设计应用的无配筋和有配筋聚丙烯纤维增强钢丝网混凝土薄板抗弯承载力计算公式.试验结果表明,聚丙烯纤维的最佳掺率是0.07%;聚丙烯纤维的掺入延缓了薄板的开裂过程,提高了薄板的抗裂性能;钢丝网对提高聚丙烯纤维增强钢丝网混凝土薄板抗弯承载力起主要作用;聚丙烯纤维与钢丝网的复合,能起到显著的增强效果,有效地提高薄板的抗弯承载力和抗裂性能.

A total of 201 specimens of polypropylene fiber reinforced ferroconcrete （PFOC） divided into 67 groups are investigated in the flexural test. The effects on the flexural behavior of polypropylene fiber reinforced ferroconcrete slabs with and without steel bars in different stages of cracks are analyzed. Based on the experimental data, the formula for calculating the bending capacity of polypropylene fiber reinforced ferroconcrete slabs with and without steel bars is also proposed. Test results show that the best volume fraction of polypropylene fiber in the slabs is 0.07% and the polypropylene fibers in the slabs leave the cracking and improve the crack resistance performance of concrete. Steel wire meshes in the slabs have the main influences on the bending capacity of polypropylene fiber reinforced ferroconcrete slabs. The bending capacity and the crack resistance performance of polypropylene fiber reinforced ferroconcrete slabs are greatly improved by the composites of polypropylene fiber and steel wire mesh.