玄武岩纤维水泥土抗压强度试验研究

Experimentstudy on compressive strength of basalt fiber cement-soil

为提高水泥土的受力性能,利用纤维加筋增强效果,探讨在水泥土中掺入玄武岩纤维来改善其力学性能的方法.通过对不同配比的玄武岩纤维水泥土开展无侧限抗压试验,结果表明:玄武岩纤维的掺入能明显提高不同龄期水泥土试件的抗压强度,但随着纤维掺量的增加,其增强效果逐渐减弱.玄武岩纤维的掺入使水泥土塑性增强,试件达到峰值应力后仍能承受一定荷载,存在残余强度,有利于提高工程安全性和稳定性.此外,根据实验结果建立了不同配比的玄武岩纤维水泥土抗压强度与龄期的关系式,可为实际工程提供参考.

In order to enhance the mechanics quality of cement-soil,the basalt fiber＇s reinforcement effect,and the way to improve cement soil＇s strength by means of mixing the basalt fiber have been discussed in this paper. The unconfined compression test was conducted on cement-soil mixing with basalt fiber in different ratio. The result showed that the incorporation of basalt fiber could effectively improve compressive strength of cement-soil specimens in different ages and it also strengthened the plastic characteristics of cement-soil. But with the increasing of fiber content,the enhancement effect was gradually weakened. The basalt fiber cement-soil specimens could still support a certain amount of load after reaching the peak load. Thus it could improve the security and stability of engineering project. Besides,the relationship between the unconfined compression strength and age of the cement-soil mixing with basalt fiber in different ratio was established.