冶金车间钢混结构的化学侵蚀性破坏

Chemical Attack Damage of Reinforced Concrete Structure in Metallurgical Workshop

通过酚酞显色反应、化学分析和SEM等综合测试 ,研究了冶金车间钢混结构遭受CO2 ,H2 S ,HCl,SO2 等腐蚀性介质的化学侵蚀性破坏。结果表明 :保护层混凝土的完全酸性化 ,使水泥主要水化产物及其微观结构发生变化 ,同时失去碱性保护层的作用 ;钢筋的钝化膜受到破坏 ,钢筋锈蚀严重 ,最终导致钢筋混凝土结构完全崩溃。

The CO 2,H 2S,HCl and SO 2 attack damage of reinforced concrete structure in metallurgical workshop has been investigated by SEM,chemical analysis and phenolphthalein color reaction methods.It was shown that the acidification of the concrete,causing hydrates to change its microstructure,could be the main factor leading to the structural damage.