聚丙烯-玄武岩混杂纤维对陶粒混凝土力学性能的影响

对掺加聚丙烯-玄武岩混杂纤维的陶粒混凝土进行了抗压强度、抗折强度、劈裂抗拉强度试验,得到了混杂纤维对陶粒混凝土力学性能的影响规律。结果表明:混杂纤维掺量为0.2%时,陶粒混凝土的抗压强度、劈裂抗拉强度、抗折强度提升幅度最大,分别较基准组提高了11.21%、30.73%、15.26%,但掺量过大时陶粒混凝土的力学性能会下降,甚至出现负效应;聚丙烯纤维与玄武岩纤维的混杂比为2∶1时,其对陶粒混凝土的增强效果较好;混杂纤维能增强陶粒混凝土的韧性,对抗折强度和抗拉强度提升效果明显,对抗压强度提升效果较小。

Influence of Polypropylene-basalt Hybrid Fiber on Mechanical Properties of Ceramsite Concrete

The compressive strength,flexural strength and splitting tensile strength tests of ceramsite concrete with polypropylene-basalt hybrid fiber were carried out,and the influence rules of hybrid fiber on the mechanical properties of ceramsite concrete were obtained.The results show that when the hybrid fiber content is 0.2%,the compressive strength,splitting tensile strength and flexural strength of ceramsite concrete have the largest increase,which are increased by 11.21%,30.73%and 15.26%respectively compared with blank group,but when the hybrid fiber content is too high,the mechanical properties of ceramsite concrete will be decreased or even have negative effect.When the mixing ratio of polypropylene fiber and basalt fiber is 2∶1,the reinforcement effect of ceramsite concrete is great.The toughness of ceramsite concrete can be enhanced by adding hybrid fiber,and the tensile strength and flexural strength are obviously improved,but the effect of improving compressive strength is small.