重污染水域环境中陶粒混凝土抗海水侵蚀性能研究

Seawater Erosion Resistance of Ceramsite Concrete in Heavily Polluted Water Environment

常规方法分析混凝土抗侵蚀性能时,仅选择材料配比作为混凝土腐蚀影响因素,导致计算的抗侵蚀系数、混凝土抗压强度和抗拉强度的皮尔森相关系数较低,为此提出重污染水域环境中陶粒混凝土抗海水侵蚀性能分析方法。判断混凝土主要受海水中的硫酸根离子侵蚀,分析水泥水化造成的孔隙度变化,计算海水侵蚀下混凝土材料膨胀应力,使其与水泥陶粒配比,得到海水侵蚀速率和侵蚀深度,计算抗侵蚀系数,抗侵蚀系数越大,表明混凝土抗侵蚀性能越优。测试结果表明,设计方法抗侵蚀系数计算值与抗压强度和抗拉强度的皮尔森相关系数最高,能够准确反映混凝土抗侵蚀性能变化。

Only the material ratio is selected as the influencing factor of concrete corrosion when analyzing the corrosion resistance of concrete by conventional methods.This results in low Pearson correlation coefficient among calculated corrosion resistance coefficient,concrete compressive strength and tensile strength.Therefore,an analysis method of seawater corrosion resistance of ceramsite concrete in heavily polluted water environment is proposed.Given that the concrete is mainly eroded by sulfate ion in seawater,analyze the porosity change caused by cement hydration,calculate the expansion stress of concrete material under seawater erosion,make it ratio with cement ceramsite,obtain the seawater erosion rate and erosion depth,and calculate the anti-corrosion coefficient.The larger the anti-corrosion coefficient,the better the anti-corrosion performance of concrete.The test results show that the calculated value of the anti-corrosion coefficient of the design method has the highest Pearson correlation coefficient with the compressive strength and tensile strength,which can accurately reflect the change of the anti-corrosion performance of concrete.