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为了研究玄武岩纤维增强混凝土(BFRC)工程应用的耐久性能,通过试验的方法开展了这种新型复合建筑材料在腐蚀条件下抗冻融性能研究。试验分别测试了玄武岩纤维增强混凝土在无腐蚀环境下、在5%Na Cl溶液、45%Mg SO溶液和复合溶液(25%Mg Cl+2 45%Na SO)中的抗冻融寿命。试验结果表明:在上述四种情况下,复合材料经过冻融循环时相对弹性模量下降速度依次减缓。结论:玄武岩纤维对混凝土在腐蚀条件下抗冻融破坏能力增强效果显著,有效地延长了混凝土在腐蚀条件下的使用寿命。
In order to study the durability of the basalt fiber reinforced concrete (BFRC) engineering application, the antifreeze properties of the new composite building materials under corrosive conditions were studied through the experimental method. The freeze-thaw life of basalt fiber reinforced concrete in 5% NaCl solution, 45% MgSO solution and composite solution (25% MgCl + 2 45% Na SO) was tested in the non-corrosive environment. The experimental results show that in the above four cases, the decreasing rate of relative elastic modulus of the composite slows down after the freeze-thaw cycles. Conclusion: The basalt fiber reinforced concrete has obvious anti-freezing and thawing abilities under corrosive conditions, which effectively prolongs the service life of concrete under corrosive conditions.