湖南大学学报（自然科学版）2017，Vol.44Issue(3)：97-104,8.DOI:10.16339/j.cnki.hdxbzkb.2017.03.012
预加荷载作用下粉煤灰/硅灰纤维混凝土氯离子渗透性能研究
Study on Resistance of Chloride Ion Penetration in Fly Ash/Silicon Ash Polypropylene Fiber Concrete under Preloading Condition
摘要
Abstract
Through NEL experimental method and scanning electron microscopy test(SEM),the resistance of chloride ion penetration in the concrete admixed with polypropylene fiber,complex minerals(fly ash/silicon ash with weight ratio of 4∶1),and polypropylene fiber under axial compressive loading or not was studied.The results show that,under no-load condition,the compactness between aggregate and cement stone improves,and the number and the width of the crevice obviously decrease in concrete specimens admixed with appropriate amount of polypropylene fiber and complex minerals.From the view of macro property,the diffusion coefficients of chloride ion decrease,and the anti-chloride ion permeability obviously increases when compared with that of the concrete admixed with polypropylene fiber or multiple minerals.The optimal proportion of the concrete for anti-chloride ion permeability is the composition of 0.1% polypropylene fiber and 25 % complex minerals co-doped.The diffusion coefficients of chloride ion slightly decrease firstly and then increase in concrete under axial compressive load.Under the same stress ratio,the chloride ion diffusion coefficient is the minimum for concrete with polypropylene fiber and complex minerals co-doped.关键词
粉煤灰/聚丙烯纤维/轴压荷载/抗氯离子渗透性能Key words
fly ash/polypropylene fibers/axial compressive load/resistance of chloride ion penetration分类
建筑与水利引用本文复制引用
何亚伯,陈保勋,刘素梅,忽彦鹏..预加荷载作用下粉煤灰/硅灰纤维混凝土氯离子渗透性能研究[J].湖南大学学报（自然科学版）,2017,44(3):97-104,8.基金项目
国家自然科学基金资助项目(51278388),National Natural Science Foundation of China(51278388) （51278388）
