碾压混凝土的抗裂性能  

Crack resistance of roller compacted concrete

作　　者：刘数华[1] 曾力[1] 吴定燕[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《哈尔滨工业大学学报》2005年第8期1071-1073,共3页Journal of Harbin Institute of Technology

基　　金：九五国家科技攻关项目(95-220-02-01-06(2))

摘　　要：为研究碾压混凝土抗裂性能,分析了碾压混凝土弹性模量、极限拉伸、徐变变形、干缩、自身体积变形、温度变形等的变形特性,通过与常态混凝土的比较,说明碾压混凝土具有较好的抗裂性能;提出抗裂参数,通过初步试验证明其合理性,其值越大,混凝土的抗裂性能就越好;二级配碾压混凝土的抗裂性能优于三级配碾压混凝土的抗裂性能,随着龄期的增加,碾压混凝土的抗裂性能将得到提高.Characteristic of deformation is the most important index of crack resistance of RCC. Narrate characteristic of deformation such as elastic modulus, ultimate elongation,creep, shrinkage, own volume deformation and temperature deformation, which shows that crack resistance of RCC is better than that of ordinary concrete. Present of parameter of crack resistance, prove it is a better kind of method to evaluate crack resistance of RCC. The larger the parameter is, the better crack resistance of RCC becomes. Crack resistance of two gradated RCC is better than that of three gradated RCC, and Crack resistance of RCC develops with age.

关 键 词：碾压混凝土 变形特性 抗裂性能 

分 类 号：TU375[建筑科学—结构工程]