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| 摘要: |
| 根据钢管拱桥的连续泵送顶升施工工艺与现场施工条件需求,提出了钢管拱自密实混凝土的性能要求及合适的性能评价方法.通过混凝土配合比基本参数优化、外加剂复掺、矿物掺和料选用等配制技术,试验配制出初始坍落度大于240 mm,坍落扩展度大于650 mm,扩展时间T50为5~15 s,4 h坍落度零损失,常压泌水率为0,强度等级达到C60以上的收缩补偿钢管拱自密实混凝土,并在工程中成功应用. |
| 关键词: 钢管拱 自密实混凝土（SCC） 补偿收缩 配制 |
| DOI： |
| 分类号:TU528.01 |
| 基金项目:“十一五”国家科技支撑计划重点项目(2006BAJ05B07-05) |
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| Preparation and Application of Self-compacting Concrete Filled with Steel Pipe Arch |
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JIANG Zheng-wu LI Xiang-tao SUN Zhen-ping WANG Pei-ming
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| Abstract: |
| According to the demands of on-site construction conditions and construction technology of continuous pumping lift-up for steel pipe arch bridge,property requirements and suitable evaluation methods of self-compacting concrete(SCC) filled with steel pipe arch were proposed.By using the preparation techniques including optimization of basic parameters of concrete mix proportion,admixture composition and mineral admixture addition,self-compacting concrete filled with steel pipe arch was prepared with the prop... |
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