低掺量水性环氧树脂对高性能混凝土抗冻耐久性的研究

Study on the Effects of Low Volume Waterborne Epoxy Resin on Freezing Resistance Durability of High Performance Concrete

用快冻法研究了低掺量水性环氧树脂乳液对高性能混凝土抗冻耐久性的影响。结果表明,水性环氧树脂乳液的加入可以显著提高混凝土的抗冻性。当乳液掺量为5%时,采用Ⅳ型养护制度养护得到的高性能混凝土的抗冻效果最好,在经历300次冻融循环后,相对动弹性模量可达94.1%;且水性环氧树脂能明显改善新拌混凝土的工作性,易于施工。

The influences of low volume waterborne epoxy resin on freezing resistance durability of high performance concrete are investigated by accelerated freezing-thaw test.The results show that the addition of waterborne epoxy resin can obviously improve the freezing resistance of concrete.The freezing resistance effect is optimal when the dosage of waterborne epoxy resin is 5% and the curing system is the Ⅳ curing system.The relative dynamic modulus of elasticity is about 94.1% by 300 times freezing-thaw cycle,and in addition,waterborne epoxy resin can improve the fluidity and workability of concrete obviously,which is easy for construction.