机制砂与河砂混凝土30m T梁足尺模型混凝土性能对比试验研究  

Comparative experimental study on concrete performance of 30 m T-shaped beam full-scale model respectively using machine-made sand and river sand

作　　者：全青青 徐文冰[1,2,3] 秦明强[1,2,3] 周玉娟[4] 

机构地区：[1]中交武汉港湾工程设计研究院有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]海工结构新材料及维护加固技术湖北省重点实验室,湖北武汉430040 [4]宁波市高等级公路建设指挥部,浙江宁波315192

出　　处：《铁道建筑》2015年第12期147-151,共5页Railway Engineering

基　　金：宁波市交通运输委员会科技项目(201210);浙江省交通厅科技计划项目(2013H28-2)

摘　　要：以"28 d龄期同强度等级"为目标优选配合比,开展了C50机制砂与河砂混凝土30 m T梁足尺模型试验,对比研究机制砂与河砂混凝土的力学性能、耐久性能、实体结构的抗裂性能。研究结果表明:机制砂混凝土通过优选配合比,具备不劣于河砂的良好的施工性能;机制砂混凝土比河砂混凝土在力学性能方面优势明显;机制砂混凝土的抗氯离子渗透性能及实体梁的抗裂性能与河砂混凝土相近;用机制砂配制的海工混凝土用于实体结构是可行性的。The ＂28 d with the same strength level＂standard was used in C50 concrete mix design with machine-made sand and river sand,respectively. A 30 m T-shaped beam full scale model test was conducted. The mechanical properties,durability and crack resistance were studied. The mechanical properties of the concrete with machine-made sand outweigh those of concrete with river sand,with the same workability,chlorine penetration resistance,crack resistance. This study has verified that the feasibility of the machine-made sand used for marine concrete in structures.

关 键 词：机制砂 30m T梁 模型试验 海工混凝土 

分 类 号：TU528.1[建筑科学—建筑技术科学]