用于箱梁的凝灰岩机制砂混凝土力学及耐久性能研究  

Research on the Mechanical and Durability Performance of Tuff Manufactured Sand Concrete Used for Box Girder

作　　者：周玉娟[1] 陈三安 占文 秦明强 徐文冰 

机构地区：[1]宁波市高等级公路建设指挥部,浙江宁波315192 [2]中国路桥集团公司,北京100011 [3]中交武汉港湾工程设计研究院有限公司,湖北武汉430040 [4]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

出　　处：《施工技术》2015年第18期16-18,共3页Construction Technology

基　　金：科技部科研院所技术开发研究专项资金(2013EG124047);宁波市社会发展重大重点项目(2013C51011);浙江省交通厅科技计划项目(2013H28-2)

摘　　要：对比研究了凝灰岩机制砂和天然河砂配制用于箱梁的C50混凝土时其力学性能和耐久性能的差异。研究结果表明:用于箱梁的凝灰岩机制砂混凝土抗压强度、抗折强度、轴心抗压强度和弹性模量均高于河砂混凝土;抗渗性能和抗裂性能接近河砂混凝土;受压徐变优于河砂混凝土。The difference of mechanical and durability performance between tuff manufactured sand concrete and river sand concrete that be used for box girder is comparative study in this paper. The results show that the compressive strength,bending strength,axial compressive strength,elasticity modulus of concrete which prepared with manufactured sand are better than river sand concrete; the antipenetrability performance and anti-cracking ability of manufactured sand concrete approach these of river sand concrete; the volume stability of former is better than that of latter.

关 键 词：混凝土 凝灰岩 机制砂 箱梁 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]