| 格丑沟大桥系杆拱桥系梁混凝土配合比优化及性能试验 |
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| 引用本文： | 贺修军.格丑沟大桥系杆拱桥系梁混凝土配合比优化及性能试验[J].城市道桥与防洪,2009(8):148-150. |
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| 作者姓名： | 贺修军 |
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| 作者单位： | 中铁十五局集团有限公司华北工程指挥部,北京,100040 |
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| 摘 要： | 格丑沟特大桥主桥为系杆拱桥,系梁采用C55混凝土,属高强高性能预应力钢筋混凝土,要求混凝土具备高工作性能(低坍落度、高流态、稳定泵送)、高抗裂性能(低收缩)、高耐久性能。该文通过掺用聚羧酸系高效减水剂、优质粉煤灰以及改善骨料质量、优化骨料级配等技术手段,对系梁混凝土进行了配合比优化及性能试验研究,为工程施工推荐了满足设计要求、经济合理的施工配合比。施工实践证明,系梁混凝土质量良好。
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| 关 键 词： | 系杆拱桥 高性能混凝土 配合比优化 试验研究 格丑沟大桥 |
Concrete Mixing Ratio Optimization and Property Test of Collar Beam for Bowstring Arched Bridge in Gechougou |
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| He Xiujun.Concrete Mixing Ratio Optimization and Property Test of Collar Beam for Bowstring Arched Bridge in Gechougou[J].Urban Roads Bridges & Flood Control,2009(8):148-150. |
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| Authors: | He Xiujun |
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| Abstract: | The main bridge of Gechougou Super-large Bridge is a bowstring arched bridge. The collar beam uses C55 concrete which is the high-strength and high-performance pre-stressed steel reinforced concrete. The concrete is required to have the high working performance (low slump value, high fluid, stable pumping), high anti-cracking performance (low shrinkage) and high durable property. The article studies the mixing ratio optimization and performance test of collar beam concrete by the technical means of mixing t... |
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| Keywords: | bowstring arched bridge high- performance concrete optimization of mixing ratio experimental study |
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