混凝土抗硫酸盐侵蚀变条件的试验

Resistance to Sulphate Erosion for Concrete under Different Conditions

研究了混凝土立方体试件在干湿循环试验方法下,针对不同的试验条件,以质量损失、抗压系数及超声值为指标,揭示混凝土抗硫酸盐侵蚀的特性。结果表明:随着侵蚀溶液温度的升高,硫酸盐溶液的侵蚀性变强,但是试验值变化不大;侵蚀溶液质量分数及混凝土强度等级的变化对混凝土的侵蚀均有比较明显的影响;试验过程中,各测评指标均经历变高再降低的过程。

Concrete cube samples were tested in terms of mass loss, compression coefficient, and ultrasonic value under different conditions by the method of drying-wetting cycles, aiming to discuss the characteristics of resistance to sulfate erosion for concrete. Results showed that the erosion of sulfate liquor became stronger with increasing temperature, but the change was not obvious. Sulfate liquor concentration and strength of concrete had significant influence on the resistance to sulfate erosion for concrete. All the indexes exhibited the same changing process, namely first increased and then decreased.