钢纤维活性粉末混凝土抗冻性能试验研究

通过试验以钢纤维0%,0.5%,1%,2%,3%五种不同掺量掺入活性粉末混凝土中,研究了钢纤维对混凝土抗冻性能的影响规律,试验冻融循环次数和钢纤维体积率对钢纤维混凝土冻融后相对动弹性模量变化、质量损失和劈裂强度损失的影响,分析了冻融环境下钢纤维对混凝土的增强机理。结果表明,活性粉末混凝土在冻融循环作用下,掺入钢纤维可以改善活性粉末混凝土的抗冻性能。钢纤维以2%的掺量与粉煤灰、硅灰复合掺入混凝土中,可以配制高抗冻性能的活性粉末混凝土。

The test research on concrete frost resistance of steel fiber reactive powder

Through the test mixed reactive powder concrete with steel fiber 0%, 0.5%, 1%, 2%, 3% five kinds of different mix contents, this paper researched the influence law of steel fiber to concrete frost resistance, the relative dynamic elastic modulus change of test freezing and tha- wing cycle times and steel fiber volume ratio to steel fiber concrete after freezing and thawing, the influence of mass loss and splitting strength loss, analyzed the reinforced mechanism of steel fiber to concrete under freezing and thawing environment. The results showed that, the reactive powder concrete under freezing and thawing role, mixed steel fiber could improve the frost resistance of reactive powder concrete. The steel fiber with 2% mix content and fly ash, silica fume compound mixed in concrete, could prepare reactive powder concrete with high frost resistance.