| 持续压荷载作用下混凝土的渗透性 |
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| 引用本文： | 方永浩,李志清,张亦涛. 持续压荷载作用下混凝土的渗透性[J]. 硅酸盐学报, 2005, 33(10): 1281-1286 |
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| 作者姓名： | 方永浩 李志清 张亦涛 |
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| 作者单位： | 河海大学材料科学与工程系,南京,210098;无锡市建设工程质量监督站,江苏,无锡,214000 |
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| 基金项目： | 国家自然科学基金（50139030）资助项目. |
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| 摘 要： | 用以受压弹簧为荷载的压力-渗透实验装置研究了持续单向压荷载作用对混凝土的水渗透性的影响。结果表明：压荷载的存在会影响混凝土的渗透性。当荷载低于60％极限荷载时，混凝土的渗透系数随应力比（压荷载／极限荷载）的增大而近似呈负指数函数减小。荷载达到70％极限荷载后，混凝土的渗透性随应力比的增大而急剧增大。混凝土的渗透系数与其抗压强度存在较好的相关性。
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| 关 键 词： | 混凝土 压荷载 渗透性 抗压强度 |
| 文章编号： | 0454-5648（2005）10-1281-06 |
| 收稿时间： | 2004-12-13 |
| 修稿时间： | 2005-04-06 |
PERMEABILITY OF CONCRETE UNDER SUSTAINED COMPRESSIVE LOAD |
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| FANG Yonghao,LI Zhiqing,ZHANG Yitao. PERMEABILITY OF CONCRETE UNDER SUSTAINED COMPRESSIVE LOAD[J]. Journal of The Chinese Ceramic Society, 2005, 33(10): 1281-1286 |
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| Authors: | FANG Yonghao LI Zhiqing ZHANG Yitao |
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| Affiliation: | 1. Department of Materials Science and Engineering, Hehei Univerisity, Nanjing 210098; 2. Wuxi Construction Quality Supervision Station, Wuxi 214000, Jiangsu, China |
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| Abstract: | The effect of sustained uniaxial compressive load on the permeability of concrete was studied by a load-permeation testing device with pressed spring loads. The results show that sustained loads influence the permeability of concrete. When the stress level expressed as the percentage of the ultimate strength falls to 60%, the permeability coefficent of concrete decreases with increasing stress level. When the stress level exceeds 70% , the permeability coefficient sharply increases. The permeability coefficient is empirically related to the compressive strength. |
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| Keywords: | concrete compressive load permeability compressive strength |
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