论文部分内容阅读
通过实验室试验研究了不同配合比混凝土力学性能随溶蚀时间的演化规律.试验设计变量主要为水灰比和骨料体积率,采用硝酸铵溶液加速混凝土溶蚀过程.试验结果表明:酚酞指示剂法能够较准确地表征混凝土的溶蚀深度,溶蚀深度近似与溶蚀时间的平方根成线性关系.混凝土弹性模量、抗压强度和劈拉强度均随着溶蚀时间的增长而减小,水灰比和骨料体积率对它们的减小速率有较大影响.与弹性模量相比,溶蚀对抗压强度和劈拉强度影响更大.当溶蚀损伤变量小于0.6时,溶蚀混凝土抗压强度模型与试验结果良好吻合.
The mechanical properties of concrete with different proportions of concrete were studied by laboratory tests with the evolution of corrosion time.The experimental design variables were water-cement ratio and aggregate volume fraction, and ammonium nitrate solution was used to accelerate the dissolution process of concrete.Experimental results showed that the phenolphthalein indicator method Which can characterize the erosion depth of concrete more accurately.The depth of erosion is approximately linear with the square root of dissolution time.Elastic modulus, compressive strength and splitting tensile strength of concrete decrease with the increase of erosion time, Compared with the elastic modulus, the dissolution has greater influence on the compressive strength and the splitting tensile strength.When the damage damage variable is less than 0.6, the compressive strength model of the corrosion concrete and the test The results are in good agreement.