【摘要】 为探究不同水胶比的混凝土在硫酸盐溶液中的腐蚀寿命,从相对抗压强度和相对动弹性模量的角度出发,采用对比试验的方法对W/B=0.26,0.32和0.38的3种混凝土试块进行硫酸盐腐蚀干湿循环实验,同时对所得数据利用最小二乘法进行拟合和分析。研究结果表明:混凝土抗腐蚀能力与水胶比呈反比,水胶比越大,混凝土的抗腐蚀能力越差;混凝土相对抗压强度、相对动弹性模量测试结果与外观变化结果相一致。函数拟合结果表明:混凝土相对抗压强度、相对动弹性模量曲线可由单一参数的二次多项式方程表示,方程计算结果与实验结果吻合较好,可用于预测不同水胶比的混凝土的硫酸盐腐蚀寿命。更多还原

【Abstract】 In order to explore the corrosion life of concrete with different water-binder ratio in sulfate solution and from the perspective of relative compressive strength and relative dynamic elastic modulus, the method of comparative test was used to conduct sulfate corrosion dry-wet cycle experiments on three concrete test blocks with W/B=0.26, 0.32 and 0.38. At the same time, the least square method was used for fitting and analysis. The research results show that the corrosion resistance of concrete is inversely proportional to the water-to-binder ratio. The larger the water-to-binder ratio, the worse the corrosion resistance of the concrete. The test results of the relative compressive strength and relative dynamic modulus of concrete are consistent with the appearance changes. The function fitting results show that the relative compressive strength and relative dynamic elastic modulus curves of concrete can be expressed by a single-parameter quadratic polynomial equation. The calculation results of the equations are in good agreement with the experimental results and can be used to predict the sulfate corrosion life of concrete with different water-binder ratios.更多还原