| 祁家黄河大桥C55微膨胀钢管混凝土试验研究 |
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| 引用本文： | 李恒堂,狄生奎,张禾.祁家黄河大桥C55微膨胀钢管混凝土试验研究[J].甘肃科学学报,2010,22(4):100-105. |
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| 作者姓名： | 李恒堂 狄生奎 张禾 |
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| 作者单位： | [1]兰州理工大学土木工程学院,甘肃兰州730050 [2]甘肃路桥工程公司,甘肃兰州730050 |
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| 基金项目： | 甘肃省交通厅科技攻关项目 |
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| 摘 要： | 结合实际工程,就单跨桥梁钢管拱C55膨胀混凝土配合比,利用卵碎石作为粗骨料的优点,通过多因素正交试验方法研究了胶凝材料用量变化、砂率、不同外加剂等因素对钢管混凝土性能的影响,分析了其限制膨胀率等各项性能,用图表法形象地对比了主要指标与混凝土相关性能的关系,从而确定了C55钢管微膨胀混凝土的配合比.为进一步完善此类实验研究提供了参考依据.
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| 关 键 词： | 微膨胀钢管混凝土 混凝土配合比 掺合物 |
An Experimental Study on Mix Proportion of C55 Micro-expanding Concrete Used at Qi's Yellow River Bridge |
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| LI Heng-tang,DI Sheng-kui,ZHANG He.An Experimental Study on Mix Proportion of C55 Micro-expanding Concrete Used at Qi's Yellow River Bridge[J].Journal of Gansu Sciences,2010,22(4):100-105. |
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| Authors: | LI Heng-tang DI Sheng-kui ZHANG He |
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| Institution: | 1. School of Civil Engineering, Lanzhou University of Science and Technology, Lanzhou 730050, China; 2. Gansu Road Bridge Engineering Company ,Lanzhou 730050,China) |
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| Abstract: | We have made the experiments on the mix proportion of C55 expansive concrete used in the steel pipe arch of single span bridge. Taking the advantage of crushed cobbles as coarse aggregate, we study its influences on concrete filled steel tubular（CFST） caused by the dosage of gelatinous material,the sand ratio,and different kind of SPAs used, etc. By using graphology, we compare its chief indications with relat- ed performances of CFST. The confined expansion rate and other performances of CFST are also investigated. The mix proportion of C55 micro-expanding CFST is finally confirmed. Multi-factor orthogonal experiment method is used in the investigations above. |
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| Keywords: | micro-expanding CFST mix proportion admixture |
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