岩土工程用玄武岩纤维复合材料研究及性能评价

Research and Performance Evaluation of Basalt Fiber Composites for Geotechnical Engineering

为了提高岩土工程的施工质量,以玄武岩纤维布、酚醛树脂、纳米材料Si-Q和固化剂ER-1为主要原料,制备了一种适用于岩土工程的玄武岩纤维复合材料,并对其拉伸性能、弯曲性能和抗老化性能进行了测试。试验结果表明:纳米材料Si-Q的加入量越大,玄武岩纤维复合材料的拉伸强度越大,而弯曲强度则先减小后增大;此外,玄武岩纤维复合材料还具有良好的耐酸碱老化性能,当纳米材料Si-Q的质量分数为5%时,玄武岩纤维复合材料在盐酸溶液中浸泡80 d后的拉伸强度和弯曲强度分别为337 MPa和252 MPa,与浸泡前相比强度保留率分别可以达到76.59%和80.25%,而在氢氧化钠溶液中浸泡80 d后的拉伸强度和弯曲强度分别为405 MPa和299 MPa,与浸泡前相比强度保留率则分别可以达到92.05%和95.22%。玄武岩纤维复合材料的综合性能较好,能够满足岩土工程施工对加固材料性能的要求。

In order to improve the construction quality of geotechnical engineering,a basalt fiber composites suitable for geotechnical engineering was prepared with basalt fiber cloth,phenolic resin,nano-material Si-Q and curing agent ER-1 as the main raw materials,and its tensile properties,bending properties and antiaging properties were tested.The results show that the tensile strength of basalt fiber composites increases with the addition of nano-materials Si-Q,while the bending strength decreases first and then increases.In addition,basalt fiber composites also have good acid-alkali aging resistance.When the mass fraction of na⁃no-materials Si-Q is 5%,the tensile strength and flexural strength of basalt fiber composites after soaking in hydrochloric acid solution for 80 days are 337 MPa and 252 MPa,respectively,and the strength retention rate can reach 76.59%and 80.25%compared with that before soaking.The tensile strength and flexural strength after soaking in sodium hydroxide solution for 80 days are 405 MPa and 299 MPa,respectively,the strength retention rate can reach 92.05%and 95.22%respectively compared with that before immersion.Basalt fiber composites have good comprehensive performance which can meet the requirements of geotech⁃nical engineering construction on the performance of reinforcement materials.