混凝土抗硫酸盐侵蚀试验方法

为配合《普通混凝土长期性能和耐久性能试验方法标准》(GBJ82-85)的修订工作,编制组对国内外混凝土抗硫酸盐腐蚀的研究和试验方法进行了充分的调研.对该调研分析报告进行梗概性介绍,旨在促进对外部硫酸盐侵蚀机制的了解和对混凝土试验方法标准的研究.列举了目前我国混凝土抗硫酸盐腐蚀研究的自然试验、室内加速试验以及浸泡方式对混凝土腐蚀性能的影响,并对中美两国相关试验方法标准作了对比.调查结果表明:我国广大地区混凝土受硫酸盐腐蚀现象普遍、问题严重.基于目前的研究现状和水平,室内加速腐蚀试验——全浸泡试验和干湿循环试验可为相关研究和实际工程提供参考依据.建议将这2种方法纳入《普通混凝土长期性能和耐久性能试验方法标准》.

Investigation of test methods of concrete under sulfate corrosion

To cooperate with the revision of Standard for Test Method of Long-Term Properties and Durability on Ordinary Concrete, an elaborate investigation has been executed about test methods and current research of concrete's resistance to sulfate corrosion. A general outline is introduced for discussion. Some domestic test methods, including natural test and accelerated tests, and effects of immersion modes on concrete's resistance to sulfate corrosion are reviewed. Relevant standards of China and the USA about sulfate corrosion on cement and concrete are compared. Based on the serious phenomena of sulfate corrosion in China and the state of art of research and application, full immersion test and dry-wet cycle test are recommended to add into the revision of current standard version (GBJ82-85).