纤维对水泥基复合材料性能影响研究进展

Research review of fiber effect on properties of cement-based composite

为拓宽纤维材料在水泥基复合材料上的应用,促进超高韧性纤维增强水泥基复合材料的发展,对目前国内外纤维性能对水泥基复合材料性能影响的研究进展进行综述。首先,介绍了纤维增强混凝土的种类及增强增韧机制,认为纤维桥接作用可阻止裂纹产生和扩展,显著提高混凝土的拉伸强度和延展性能。其次,分析了混凝土领域常用有机纤维和无机纤维的性能特征;然后对影响纤维增强混凝土性能的因素进行归纳与总结,从混杂纤维、纤维形态、体积分数、纤维排列方向以及纤维粘结性能对复合材料性能的影响关系进行分析。最后,指出纤维增强混凝土研究中亟待解决的问题,并展望了未来纤维增强混凝土的发展趋势。

In order to broaden the application of fiber materials in cement-based composites and to promote the development of ultra high toughness cement-based composite,the research progress on the effect of fiber properties on cement-based composite properties in China and abroad was reviewed.Firstly,the types of fiber reinforced concrete and the mechanism of strengthening and toughening were introduced.It is noted that fiber bridging can prevent the crack generation and expansion,and significantly improve the tensile strength and ductility of concrete.Secondly,the performance characteristics of organic fiber and inorganic fiber used in concrete field were analyzed.Then,the factors affecting the performance of fiber-reinforced concrete were summarized,and the influences of hybrid fibers,fiber morphology,volume fraction,fiber arrangement direction and fiber bonding property on the performance of composite materials were analyzed and summarized.Finally,the problems needing to be solved in the research of fiber reinforced concrete were highlighted and the development trend of fiber reinforced concrete in the future was forecasted.