| 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. |
| 关键词: 抗渗性能 耐久性 纤维 氯离子渗透性能 |
| DOI：10.3969/j.issn.1007 9629.2012.04.007 |
| 分类号: |
| 基金项目: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） |
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| Study on Influence of External Load on Fiber Concrete Impermeability |
|
SUN Jia ying1，2
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Research Center of Green Building Material and Waste Resources Reuse, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China
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| Abstract: |
| 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 30%, 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. |
| Key words: impermeability durability fiber chloride permeability |
