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采用干湿循环法,研究了普通混凝土和混杂纤维混凝土标准立方体试块(150 mm×150 mm×150 mm)对面侵蚀,在800和6 000 mg/L两种硫酸钠侵蚀溶液质量浓度下,分别在侵蚀龄期为0,30,60,90,180,210 d的抗硫酸盐侵蚀性能.结果表明:当侵蚀龄期达210 d,侵蚀溶液质量浓度为800和6 000 mg/L时,普通混凝土抗压强度分别劣化了5.6%和10.0%,劈裂抗拉强度分别劣化了3.0%和5.1%;混杂纤维混凝土抗压强度分别劣化了4.0%和6.3%,劈裂抗拉强度分别劣化了0.51%和3.8%;侵蚀深度为1.5 mm时,普通混凝土的SO2-4质量分数分别为0.83%和1.03%,混杂纤维混凝土SO2-4质量分数分别为0.79%和1.00%.
The wet and dry cycles method was used to study the erosion of normal concrete and hybrid fiber reinforced concrete with standard cube test blocks (150 mm × 150 mm × 150 mm). Under 800 and 6 000 mg / L respectively, Sulfate erosion resistance at 0, 30, 60, 90, 180, 210 d was observed in the erosion period.The results showed that when the erosion age was 210 d and the concentration of erosion solution was 800 and 6 000 mg / L, the compressive strength Respectively, degraded by 5.6% and 10.0% respectively, the splitting tensile strength deteriorated by 3.0% and 5.1%, respectively; the compressive strength of hybrid fiber concrete deteriorated by 4.0% and 6.3%, respectively, and splitting tensile strength deteriorated by 0.51% and 3.8% %. When the depth of erosion is 1.5 mm, the mass fraction of SO2-4 in ordinary concrete is 0.83% and 1.03% respectively. The mass fraction of SO2-4 in hybrid fiber concrete is 0.79% and 1.00% respectively.