酸碱和冻融双重腐蚀下混凝土力学效应的试验研究

Test Study on Concrete Mechanical Effect Under Together Work of Chemistry and Frost and Thaw Torrosion

在酸碱和冻融双重腐蚀条件下,进行了混凝土室内模拟试验。通过对混凝土的表面腐蚀现象、单轴抗压强度以及应力—应变关系的探讨和分析,结果表明:强酸和强碱均对混凝土具有明显的腐蚀性;酸碱和冻融循环腐蚀在不同时期分别占据主导作用,双重腐蚀加速了混凝土力学性能的劣化。同时,对酸碱和冻融腐蚀的机理进行了分析。本文的研究对混凝土在复杂环境条件下的设计和工程应用具有重要参考价值。

The experiments for corrosion of concrete are carried out with complex environments such as acid, alkali, frost and thaw. The tests show that pH indicator has evident influence on mechanical properties of concrete. Erosion rate is accelerated under work together of pH indicator and circulation of frost and thaw. At the same time, erosion mechanism is simply analyzed. The conclusions obtained are reference for the design and applications of concrete in complex environments.