桥用高性能混凝土的徐变与应用  

Creep of high-performance concrete for bridges and its application

作　　者：陈灿明[1] 黄卫兰[1] 陆采荣[1] 唐崇钊[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《水利水运工程学报》2007年第2期1-9,共9页Hydro-Science and Engineering

摘　　要：基于2座桥梁混凝土徐变的试验结果,论述了高性能混凝土的长期变形特征,指出对提高混凝土弹性模量、减少徐变收缩的水泥、外加剂和骨料的三要素中,骨料的作用最明显.提出了徐变的湿度、尺寸修正方法与计算式,探讨了掺筋混凝土的徐变修正、徐变行为的温度效应及长期徐变等.The long-term deformation characteristics of high-performance concrete are discussed based on the results of concrete creep tests for two bridges. It is pointed out that aggregate is the most effective of the three quality factors of concrete, cement, admixture and aggregate, for enhancing the elastic modulus and reducing the creep shrinkage. A modification method and calculation formulas for the humidity-dimension of creep are presented, and the creep modification of reinforced concrete, temperature effect of creep behavior and the long-term creep are discussed.

关 键 词：混凝土徐变 湿度修正 尺寸修正 温度效应 掺筋量修正 弹性模量 室内试验 

分 类 号：TV315[水利工程—水工结构工程]