细橡胶粉纤维混凝土力学性能实验研究

Experimental Study on Force-bearing Performance of Concrete Modified by Fiber and Fine Rubber Powder

为了研究80目和100目橡胶粉对路用混凝土力学性能的影响,通过25组实验,分别对基准混凝土、细橡胶粉混凝土和橡胶粉纤维混凝土进行了抗压强度和劈裂强度实验.实验结果表明：随着80目和100目橡胶粉掺量的增加,混凝土抗压强度呈现降低的趋势;橡胶粉和纤维的共同掺入,可以改善混凝土的抗变形能力和延性,在细橡胶粉纤维混凝土应用设计时,橡胶粉掺量和纤维掺量应分别控制为2％～6％和0.2％～0.5％.

In order to investigate the influence of the synergistic reaction of fiber and fine rubber powder on force-bearing performance of concrete used in subgrade.Test items include compressive strength and split strength of standard concrete,fine rubber concrete and fiber-rubber concrete,and 25 groups test are conducted.The results indicated that with the increasing of content of 80 mesh and 100 mesh rubber powder,the compressive strength of concrete decreasing regularly; with adding the blends of fiber and fine rubber powder,the anti-breaking strength and extension of concrete are promoted; the content of fine rubber powder is less than 6 ％ and the fiber is less than 0.5 ％ is advantageous to the performance of the concrete.