聚丙烯纤维对轻骨料混凝土力学性能的影响

采用天然浮石作为粗骨料,同时掺入聚丙烯纤维及聚丙烯纤维和钢纤维混合配制混凝土,对纤维轻骨料混凝土的表观密度、抗压强度、弹性模量、抗折强度以及弯曲韧性进行研究,试验结果表明,掺入聚丙烯纤维,抗压强度有所下降,但不增加轻骨料混凝土的表观密度;聚丙烯纤维和钢纤维混掺可以在不增加表观密度,保证强度的基础上,有效地改善轻骨料混凝土的韧性.

Effect of Polypropylene Fiber on Mechanical Properties of Lightweight Aggregate Concrete

Polypropylene fibers,steel fiber and their hybrid fibers can be incorporated into a lightweight aggregate concrete (LWAC) of pumice as coarse aggregate,respectively.Apparent density,compressive strength,elastic modulus,flexural strength and flexural toughness of the fiber-reinforcod LWAC were investigated.The results show that the introduced of polypropylene fibers would be result in the decrease of the compressive strength of LWAC.But its toughness could be increased,and its low apparent density kept.On introducing hybrid fibers,the toughness of LWAC could be improved effectively,whereas both its low apparent density and strength would be maintained.