| 沉管混凝土抗裂性能温度应力试验评价及配合比优选 |
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| 引用本文： | 王迎飞,李超,宋雪峰.沉管混凝土抗裂性能温度应力试验评价及配合比优选[J].水运工程,2014(9):37-42. |
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| 作者姓名： | 王迎飞 李超 宋雪峰 |
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| 作者单位： | 中交四航工程研究院有限公司,广东广州,510230 |
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| 基金项目： | 国家科技支撑计划项目（2011BAG07B04） |
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| 摘 要： | 通过温度应力试验,研究不同配合比的温度变化规律、体积变形性能以及应力发展规律,分析胶凝材料用量、水泥所占比例、浆体比率等因素对混凝土抗裂性能的影响。分别采用断裂温差、温度收缩系数以及抗裂安全系数3种不同的抗裂性能指标对混凝土抗裂性能进行评价,优选出具有最优抗裂性能的配合比用于港珠澳大桥沉管预制施工。
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| 关 键 词： | 沉管混凝土 温度应力试验 断裂温差 温度收缩系数 抗裂安全系数 抗裂性 |
Evaluation of crack resistance and optimization mix proportion for immersed tube concrete based on temperature stress testing |
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| WANG Ying-fei,LI Chao and SONG Xue-feng.Evaluation of crack resistance and optimization mix proportion for immersed tube concrete based on temperature stress testing[J].Port & Waterway Engineering,2014(9):37-42. |
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| Authors: | WANG Ying-fei LI Chao and SONG Xue-feng |
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| Institution: | CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China |
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| Abstract: | Based on temperature stress testing,we study the temperature variation,volume deformation properties and stress of different mix proportion,and analyze the effect of the amount of cement,cement proportion,slurry ratio on the crack resistance of concrete.Using the temperature difference of fracture,temperature shrinkage coefficient and cracking safety coefficient,we evaluate the crack resistance of concrete and choose the mix proportion with the best anti-cracking performance,which is applied to he construction of immersed tube precasting in Hong Kong-Zhuhai-Macao Bridge project. |
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| Keywords: | immersed tube concrete temperature stress testing temperature difference of fracture temperature shrinkage coefficient cracking safety coefficient crack resistance |
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