玄武岩纤维混凝土腐蚀条件下抗冻融性能试验研究

EXPERIMENTAL STUDY ON ANTI-FREEZING AND THAWING PERFORMANCE OF REINFORCED CONCRETE OF BASALT FIBER UNDER CORROSION CONDITION

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。

Basalt fiber reinforced concrete(BFRC) is a kind of new composite building materials. In order to study its engineering durability, the freeze-thaw performance of this new composite building material under corrosion-resistance conditions can be studied by experimental method. Tests were respectively carried out for the concrete life reinforced by anti-freeze-thaw basalt fiber in a non-corrosive environment, at 5% Na Cl solution, 5% Mg SO4 solution and complex solution(5% Mg Cl2 +5% Na2SO4). The results showed that: in above four cases, when the composite material experienced freeze-thaw cycles, the speed of elastic modulus would become lower in turn. Conclusions: Basalt fiber can significantly enhance the ability of freeze-thaw damage of concrete corrosion under freeze-thaw conditions and extend the cyclic lifespan of freeze-thaw concrete under corrosion resistance conditions.