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| 跨海大桥混凝土抗裂的技术措施 | |
| 引用本文： | 孙家瑛,邓世汉,张杰.跨海大桥混凝土抗裂的技术措施[J].铁道科学与工程学报,2007,4(1):58-62. |
| 作者姓名： | 孙家瑛 邓世汉 张杰 |
| 作者单位： | 1. 上海市市政工程研究院,上海,200031;上海大学,上海,200072 2. 湛江港集团有限公司,广东,湛江,524027 3. 南方工程建设局,广东,湛江,415900 |
| 基金项目： | 上海市重大攻关项目(2006-2-2) |
| 摘 要： | 通过调查钢筋混凝土桥梁发现,现有的桥梁混凝土基本上都有不同程度的开裂现象。研究表明,高性能混凝土虽然其本身的力学性能和耐久性满足跨海大桥混凝土技术要求,但其开裂的风险随之大幅度增加。因此,只有提高高性能混凝土抗裂能力才能充分发挥其高抗氯离子渗透性能的特性。试验结果表明,在掺活性掺合料高性能混凝土中掺加一定量合成纤维可以使混凝土或砂浆减裂95%以上,并可以提高混凝土耐久性。 |
| 关 键 词： | 高性能混凝土 抗氯离子渗透 耐久性 抗裂 纤维 |
| 文章编号： | 1672-7029(2007)01-0058-05 |
| 修稿时间： | 2006年9月20日 |
Study on prevention measures of concrete cracking on the sea-crossing bridge |
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| SUN Jia-ying,DENG Shi-han,ZHANG Jie.Study on prevention measures of concrete cracking on the sea-crossing bridge[J].Journal of Railway Science and Engineering,2007,4(1):58-62. | |
| Authors: | SUN Jia-ying DENG Shi-han ZHANG Jie |
| Abstract: | By investigating mass reinforced concrete bridge,it was found that there were different extent cracking phenomena of concrete.The results of research indicate that although the mechanical properties and durability of HPC satisfy the technology demand of sea-crossing bridge concrete,its cracking risk increases greatly.Improving ability of HPC can assume its permeability of chloride ion fully.Final results of experiment indicate that adding some synthetic fiber to HPC with the mineral admixture or cement mortar can decrease cracking 95% at least and enhance the durability of concrete. |
| Keywords: | high-performance concrete permeability of chlorideion durability anti-crack fibre |
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