碾压混凝土抗裂性能的研究

Research on anti-crack property of roller compacted concrete

碾压混凝土的抗裂性能是坝工设计人员关心的问题之一。根据现有的资料,对影响碾压混凝土抗裂性能的抗拉强度、变形特性、热学特性等进行分析,在此基础上,研究碾压混凝土的抗裂特性,获得碾压混凝土具有优良抗裂性能的结论,同时提出了衡量碾压混凝土抗裂性能的指标,指出碾压混凝土抗裂能力存在时间效应问题。

Anti-cracking performance of roller compacted concrete (RCC) is one of the subjects which is interested by the designers. According to the available data, the factors,i.e. tensile strength, deformation properties, thermal properties and so on, which affects crack resistance of RCC, are analyzed. Then anti-cracking performance of RCC researched. It is concluded that RCC possess good anti-cracking performance. An anti-cracking performance index of RCC is put forth. It showed that anti-cracking performance is change with the age of RCC.