硅酸盐通报2017，Vol.36Issue(5)：1457-1463,7.
混杂纤维混凝土的耐硫酸盐腐蚀性能研究
Sulfate Corrosion Resistance of Hybrid Fiber Reinforced Concrete
摘要
Abstract
In order to further improve the resistance of concrete to sulfate corrosion, under the condition of optimum mix proportion, the experiment of dry and wet corrosion and long-term immersion corrosion of concrete with different fiber content was carried out.The macro test methods such as morphology damage observation, mass loss, relative dynamic elastic modulus and compressive strength were adopted, to study the corrosion resistance of hybrid fiber concrete and its corrosion mechanism by SEM microstructure test.The results show that the concrete with different fiber content has different degree of damage under sulfate corrosion;the corrosion damage under the wet and dry cycle is more obvious than the long-term soaking corrosion.In the long-term immersion corrosion time of 450 d, the concrete has a compressive strength of 60 MPa, and the fiber concrete has a compressive strength of 70 MPa.However, in the dry and wet cycle corrosion, polyethylene fiber and polypropylene crude synthetic fiber mixed with 0.8%+1.2%, the concrete also has a compressive strength of 70 MPa.Fiber can alleviate the internal structural stress of concrete, disperse porosity, channel and other defects, as well as fiber bundles between the bridge are significantly improved the resistance to sulfate corrosion of concrete.关键词
纤维混凝土/硫酸盐/腐蚀性/干湿循环/长期浸泡Key words
fiber concrete/sulfate/corrosive/dry and wet cycle/long-term immersion分类
建筑与水利引用本文复制引用
何锐,谈亚文,李丹,盛燕萍..混杂纤维混凝土的耐硫酸盐腐蚀性能研究[J].硅酸盐通报,2017,36(5):1457-1463,7.基金项目
国家自然科学基金(51508030) （51508030）
青海省重大科技专项计划项目(2014-GX-A2A) （2014-GX-A2A）
长安大学中央高校基本科研业务费专项资金资助(310831162001,310831161001) （310831162001,310831161001）
