应力作用下纤维混凝土抗渗特征研究  

Study on Influence of External Load on Fiber Concrete Impermeability

作　　者：孙家瑛[1,2] 

机构地区：[1]浙江大学宁波理工学院绿色建材与废弃物资源化研究中心,浙江宁波315100 [2]上海大学土木工程系,上海200072

出　　处：《建筑材料学报》2012年第4期474-477,共4页Journal of Building Materials

基　　金：科技部国际合作项目(2010DF24590);国家自然科学基金资助项目(50808160);宁波市创新团队项目(2011B81005)

摘　　要：通过试验研究了聚丙烯(PP)纤维和植物纤维素(UFPP)纤维对受荷混凝土渗透性能的影响.结果表明:在一定荷载范围内,纤维混凝土的抗渗能力有所提高,当荷载超过混凝土破坏荷载30%左右时,其抗渗能力随之下降.同时研究了纤维对各龄期混凝土抗氯离子渗透性能及抗冻融循环耐久性能的影响,并分析了其机理.Ability of concrete to resist plastic cracking can be improved by adding a certain amount of fiber to it. The influence of UFPP fiber and polypropylene（PP） fiber on improvement of impermeability of cement concrete loaded by experiment were studied. The results show that within a certain load capacity the concrete permeability increased, when the load exceeded the ultimate load of concrete is about 300/00, the impermeability of concrete come down. At the same time, it was researched on the influence of fiber on the chloride permeability and the freeze-proof capability of different ages concrete, and also explained the mechanism of improvement. And the research results are applied in the engineering practice of Shanghai Yangtze River Bridge.

关 键 词：抗渗性能 耐久性 纤维 氯离子渗透性能 

分 类 号：TU528.32[建筑科学—建筑技术科学]