海水环境下水下不分散混凝土的耐久性研究

Durability Study of Non-Dispersion Underwater Concrete in Sea Water Environment

优选原材料、外加剂和矿物掺合料,设计4种配合比的C40水下不分散混凝土,采用陆上(L)、淡水(D)、海水(H)成型,在混凝土力学性能测试的基础上,进行耐久性能(抗氯离子渗透)测试,特别是在干湿交替部位抗氯离子渗透性能.试验表明,矿物掺合料能改善混凝土拌合物的流动性,对耐久性有积极的作用.

Raw material, admixture and mineral admixtures are selectied, and four group mix proportions of non-dispersible underwater concrete are designed with strength of C40 and are made in three conditions ： on the land, in fresh water and in seawater. Based on testing of physics mechanical Properties, underwater concrete durability the （resistance to chloride ion penetration） is emphatically studied. The results show that mineral admixtures can improve the fluidlity and durability remarkably.