碾压混凝土抗裂性能研究  

Research on Crack Resistance of the Roller Compacted Concrete

作　　者：刘数华[1] 曾力[1] 吴定燕[1] 

机构地区：[1]武汉大学水利水电学院,湖北武汉430072

出　　处：《重庆建筑大学学报》2002年第5期71-75,共5页Journal of Chongqing Jianzhu University

基　　金：<九.五>国家科技攻关课题<提高碾压混凝土抗裂能力的研究>(95-220-02-01-06(2))

摘　　要：碾压混凝土的抗裂问题如今已越来越被人们重视。研究表明:改善碾压混凝土的界面过渡区,提高混凝土用水泥韧性,选用优质骨料,提高混凝土的强度及添加外加剂可以提高碾压混凝土的抗裂性能。影响碾压混凝土抗裂性能的因素很多,有的甚至相互交叉影响。为了全面准确又简单明了地评价碾压混凝土的抗裂性能,根据碾压混凝土的结构特性和变形性能,提出了用于评价碾压混凝土抗裂能力的指标—抗裂参数Ф。通过试验表明,用抗裂参数作为评价碾压混凝土的抗裂能力的指标是合适的。这对实际工程中提高碾压混凝土的抗裂能力具有指导意义。To the crack resistance of roller compacted concrete, more and more attention was paid. Research shows that the crack resistance could be increased by improving the interface transition zone, using high quality aggregate, increasing concrete strength and adding the admixtures. There are many factors influencing the crack resistance of roller compacted concrete, some of which are interdependent. In order to evaluate the crack resistance of roller compacted concrete accurately and clearly, a parameter of crack resistance Φ is presented as a comprehensive assessment of crack resistance of roller compacted concrete according to its structural behavior and deformability. Results show that this parameter is useful at assessing the crack resistance of concrete.

关 键 词：碾压混凝土 抗裂性能 综合评价 骨料 

分 类 号：TV431.1[水利工程—水工结构工程]