| 水泥基材料体积稳定性对大坝混凝土开裂的影响 |
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| 引用本文： | 高培伟,吴胜兴,林萍华,吴中如,唐明述. 水泥基材料体积稳定性对大坝混凝土开裂的影响[J]. 水力发电, 2005, 31(3): 33-36 |
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| 作者姓名： | 高培伟 吴胜兴 林萍华 吴中如 唐明述 |
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| 作者单位： | 河海大学土木工程学院,江苏,南京,210098;南京工业大学,江苏,南京,210009 |
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| 基金项目： | 国家电力公司科学技术项目(SPKJ006-13-01-01),国家自然科学基金资助项目(50278031),江苏省博士后基金联合资助 |
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| 摘 要： | 温度收缩、干缩和化学减缩等均能引起大坝混凝土的开裂。冷却和表面养护可以部分减少温度应力和干燥所引起的开裂。但无法消除化学减缩所产生的开裂,尤其是材料性能变化所产生的体积变形。对混凝土坝开裂起着决定性作用。这也是解决混凝土坝开裂问题的关键。
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| 关 键 词： | 水泥基材料 体积稳定性 大坝混凝土 混凝土裂缝 化学收缩 |
| 文章编号： | 0559-9342(2005)03-0033-04 |
Influence on the volume stability of cementitious materials on the cracking of dam concrete |
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| Gao Pei-wei,Wu Sheng-xing,Lin Ping-hua,Wu Zhong-ru,Tang Ming-shu. Influence on the volume stability of cementitious materials on the cracking of dam concrete[J]. Water Power, 2005, 31(3): 33-36 |
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| Authors: | Gao Pei-wei Wu Sheng-xing Lin Ping-hua Wu Zhong-ru Tang Ming-shu |
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| Affiliation: | Gao Pei-wei1,Wu Sheng-xing1,Lin Ping-hua1,Wu Zhong-ru1,Tang Ming-shu2 |
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| Abstract: | There are many factors to make the large dam concrete cracking, such as temperature shrinkage, dry shrinkage and chemical shrinkage. It is possible to reduce the length and width of concrete cracks producing by temperature shrinkage and dry shrinkage with superficial cooling and insulation of concrete, but cannot diminish cracks causing by chemical shrinkage. It is suggested that the volume stability of cementitious materials play an importance role in preventing cracks in dam concrete and terminating the history of "no dam without cracks". |
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| Keywords: | cementitious materials volume stability dam concrete cracks chemical shrinkage |
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