| 桥面铺装混凝土早期裂缝控制 |
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| 引用本文： | 王东阳,陈淑贤. 桥面铺装混凝土早期裂缝控制[J]. 长安大学学报(自然科学版), 2006, 26(3): 21-25 |
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| 作者姓名： | 王东阳 陈淑贤 |
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| 作者单位： | 1. 长安大学,特殊地区公路工程教育部重点实验室,陕西,西安,710064
2. 吉林交通职业技术学院,土木建筑工程系,吉林,长春,130012 |
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| 摘 要： | 对桥面铺装混凝土早期裂缝产生的原因进行了理论分析。根据分析结果，采用混凝土温度应力试验机，在优选骨料的基础上对掺加不同掺和料、膨胀剂和聚丙烯纤维的混凝土早期裂缝进行了试验研究。通过对试验过程的对比分析，阐明混凝土成分对早期裂缝的影响，其中膨胀能转化为膨胀变形和掺粉煤灰及聚丙烯纤维，可使应力储备增大，裂缝温度降低，综合抗裂性能增强。最后给出了改进控制桥面铺装混凝土早期裂缝的设计和施工方法。
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| 关 键 词： | 道路工程 桥面铺装 混凝土 早期裂缝 温度应力 控制 |
| 文章编号： | 1671-8879（2006）03-0021-05 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-06-10 |
Control of Concrete Craking at Early Time for Bridge Overlay |
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| WANG Dong-yang,CHEN Shu-xian. Control of Concrete Craking at Early Time for Bridge Overlay[J]. JOurnal of Chang’an University:Natural Science Edition, 2006, 26(3): 21-25 |
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| Authors: | WANG Dong-yang CHEN Shu-xian |
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| Abstract: | The reason of cracks' occuring in concrete overlay on bridge is studied.It is found that the cracks are related to different pozzolanic mortar,expansive agent and polypropylene fiber.A test is carried out to reveal those relationships.Based on the test results,a numericeal model is developed.The analytic results show that the expansive agent can translate expansive energy into expand distortion,adding pozzolanic mortar and polypropylene fiber can increase concrete stress,so the anti-crack performance of concrete can be increased.The design and construction method for controling concrete cracks is presented.3 tabs,2 figs,6 refs. |
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| Keywords: | road engineering bridge overlay concrete cracks at early time temperature stress control |
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