Ⅱ级粉煤灰高性能混凝土的长期抗硫酸盐侵蚀性能

摘要

Mortar specimens in different water-binder ratio and different contents of Ⅱ fly ash which were made according to the ratio of High Performance Concrete,immersed in solutions of different concentrations of sulfate,up to 2 years of erosion test. The results indicated that the curing conditions of the short age of lower content of II fly ash of the specimen limited long-term resistance to corrosion in the environment of high concentration of sulfate attack. Whereas, with the increase of curing period and content of II fly ash and with the decrease of water-binder ratio, the specimen ability of corrosion resistance greatly improved,which reflected the superior long-term resistance to the erosion.%按高性能混凝土配比制配不同水胶比、不同Ⅱ级粉煤灰掺量的普通水泥胶砂试件,浸泡在不同浓度的硫酸盐溶液中,进行长达2年的侵蚀试验.结果表明:短龄期养护条件下较低粉煤灰掺量(30％)试件在高浓度硫酸盐侵蚀环境中的长期抗蚀能力有限.而随养护龄期和Ⅱ级粉煤灰掺量的增加以及水胶比的降低,试件的抗蚀能力大幅度提高,体现出优越的长期抗侵蚀能力.