输变电工程桩基础混凝土的耐久性研究及分析

Durability Study and Analysis on Pile Foundation Concrete in Power Transmission Project

通过一系列耐腐蚀试验，来研究强腐蚀地区混凝土强度等级及矿物掺合料对输变电工程灌注桩基础耐久性能的影响。研究表明，采用普通硅酸盐42．5水泥、复掺粉煤灰与磨细矿渣粉、低水胶比配置的强度等级为C30、C40的混凝土试件，其耐腐蚀性能均较好；C40混凝土较C30混凝土抗腐蚀能力稍强。但从施工技术及经济等因素综合考虑，在实际强腐蚀地区输变电工程中可采用C30混凝土灌注桩基础。

The pile foundation＇s durability in power transmission project was studied through a series of corrosion resistant experiments in highly-corrosive region. During the study, the factors of different concrete strength grade and combined admixture were involved. The study indicates that the concrete specimens with strength class of C30 and C40, which is made of ordinary Portland cement 42.5, combined admixture of fly-ash and slag, low water binder ratio, have better corrosion-resistant capabilities. And the corrosion-resistance capabilities of concrete C40 are slightly better than that of concrete C30. But in consideration of construction technology and economic, pile foundation made of concrete C30 can be used in power transmission project of highly-corrosive region.