玻璃纤维加筋水泥土耐久性试验研究

水泥土是简易机场建设中道面基层的主要使用材料之一,但在使用中易遭受水的侵蚀,为解决水泥土水稳性和耐久性不良的问题,采用玻璃纤维对水泥土进行加筋,对不同土质、不同纤维掺量和长度的玻璃纤维加筋水泥土开展飞散性和磨耗试验,对其抗飞散性和耐磨耗性进行了研究。研究结果表明:浸水养护后试件的抗飞散性能明显低于常规养护试件,而纤维的加入可以缩小两者差距,有效提高水泥土水稳定性,同时玻璃纤维加筋水泥西安土水稳定性能优于玻璃纤维加筋水泥三亚土;纤维的长度和掺量对水泥土抗飞散性和耐磨耗性有较大影响,在所研究的范围内,当纤维掺量为0.3%,长度为6 mm时纤维对水泥土抗飞散性能增强效果最好,当纤维掺量为0.3%,纤维长度为12 mm时对水泥土耐磨耗性能增强效果最好。综合来看,当玻璃纤维长度为6 mm或12 mm,掺量为0.3%时对水泥土的加筋效果最好。

Experimental study on durability of glass fiber reinforced cemented soil

Cemented soil is one of the main materials used in the pavement base of the construction of the airstrip, but it is vulnerable to water erosion in use. In order to solve the problem of poor water stability and durability of cemented soil, glass fiber was used to reinforce the cemented soil. In this paper, the dispersion tests of cemented soil reinforced by glass fiber with different soils, different fiber contents and lengths were carried out, and the dispersion resistances were studied. The results show that the Anti-dispersion performance of the specimens after immersion curing is obviously lower than that of the conventional curing specimens. The addition of fibers can narrow the gap between them and effectively improve the water stability of cemented soil. At the same time, the water stability of glass fiber reinforced cemented Xi’an soil is better than that of Sanya soil. In the range of study, when the fiber content is 0.3% and the length is 6 mm, the Anti-dispersion performance of cement soil is enhanced best. And when the fiber content is 0.3% and the length is 6 mm, the wear resistance of cemented soil is enhanced best. Generally speaking, when the length of glass fiber is 6 mm or 12 mm and the content is 0.3%, the reinforcement effect of cemented soil is the best.