崇启大桥50m箱梁冬季超早强高性能混凝土配制技术  

Preparation of High Performance Concrete with Super-early Strength in Winter for 50m Girder in Chongming-Qidong Bridge

作　　者：白平 陶建飞 赵潇文 宋伟明 

机构地区：[1]中交二航局第二工程有限公司质量检测所,重庆400016

出　　处：《施工技术（下半月）》2012年第5期18-21,共4页Construction Technology

摘　　要：结合崇启长江公路大桥江苏段施工特点,介绍了箱梁湿接缝施工工艺。详细讲述了混凝土配合比技术要求、配制思路及措施、配制技术难点,工程技术措施、主要原材料及配合比选定等。对混凝土配合比水化热、耐久性、冬季湿接缝C55混凝土配合比力学性能进行试验检测,结果满足规范要求,并有效缩短工期,节省施工成本,工程质量得到保证。Combining with the construction characteristics of Jiangsu segment in Chongming-Qidong Bridge, construction process of wet joints in the girder is introduced. The requirement, preparation thinking and measures, difficulties of concrete mix proportion are described in detail, as well as the technique measures, main raw materials and the selection of mix proportion. The tests are done to detect the concrete hydration heat, durability and the mechanical properties of C55 concrete at wet joints in winter. The result shows that the construction period is shortened, the construction cost is saved, and construction quality is ensured. The preparation techniques meet the requirements of codes or standards.

关 键 词：桥梁工程 混凝土 高性能混凝土 湿接缝 配制技术 

分 类 号：TU755[建筑科学—建筑技术科学]