摘   要：通过试验对硫酸盐侵蚀循环作用下钢纤维粉煤灰混凝土的抗压强度、抗拉强度和抗折强度进行了研究，分析了钢纤维体积率、粉煤灰掺量和硫酸盐浓度对混凝土强度的影响规律。结果表明，钢纤维粉煤灰混凝土抗压强度随着硫酸盐浓度的增加呈现出了先增大后减小的变化规律，而抗压强度和抗折强度均呈现出了加速减小的趋势；适量掺加的钢纤维和粉煤灰能够有效提高粉煤灰混凝土的强度和抗硫酸盐腐蚀能力，理想的掺量比例为钢纤维体积率1.0%，粉煤灰掺量30%。

Abstract: Compressive strength, tensile strength and flexural strength of steel fiber fly ash concrete under the action of the sulfate erosion cycle are studied through indoor test method. The influence laws of concrete strength with the steel fiber volume ratio, dosage of fly ash and sulfate concentration are analyzed. The results show that the steel fiber concrete compressive strength of fly ash increases first then decreases with the increase of sulfate concentration, while the compressive strength and flexural strength present a decrease trend. The strength and sulfate corrosion resistance of fly ash concrete can be improved effectively by adding a proper amount of steel fiber and fly ash. The ideal dosage proportion is steel fiber volume rate 1.0%, fly ash content 30%.