混凝土受除冰盐侵蚀破坏机理及防治措施研究

论述了混凝土受冰盐剥蚀破坏的特征 ,破坏的物理及化学机理和混凝土盐冻破坏的主要控制因素。分析了掺引气剂和降低水灰比对混凝土的抗盐冻侵蚀性能的改善 ;不同的掺合料硅灰、粉煤灰、矿渣、石灰石对混凝土抗盐冻性的影响 ;钢纤维与硅粉混合也是改善混凝土受冻剥蚀的有效措施。

RESEARCH ON COUNTERMEASURES AND DETERIORATION MECHANISM OF CONCRETE ERODED BY DEICING SALT

In this paper,many aspects about deicing salt scaling were investigated,such as its characteristics,physical and chemical mechanism and many influences on the mechanism of deterioration.Addition of air-entraining and reduction of the w/c increase the deicing salt scaling resistance of concrete;Addition of silica fume?fly ash?limestone has different influences on the deicing salt scaling resistance of concrete; Because of the addition of steel fiber and air-entraining admixture, the frost resistance of concrete was improved;Combination of silica fume and steel fiber reinforcement is an effective measure to mitigate the damage of concrete;