硫酸盐-氯盐复合因素对混凝土的损伤特性研究

Study on Damage Characteristics of Concrete by Compound Factors of Sulfate and Chlorate

高性能混凝土的耐久性在工程应用中尤为重要。本试验分别研究了硫酸盐、氯盐,以及硫酸盐和氯盐复合因素、海水等作用下对高性能混凝土以及钢筋混凝土的损伤特性。氯盐较高的扩散系数可对硫酸盐侵蚀起到一定的抑制作用,矿物掺合料有利于混凝土耐久性能的提高,在海水侵蚀下,由于多种离子的相互作用,高性能混凝土和钢筋混凝土的损伤过程相对缓慢。

The durability of high performance concrete is particularly important in engineering applications.In this paper,the damage characteristics of high performance concrete and reinforced concrete under the action of sulfate,chloride,sulfate-chloride compound factors and seawater were studied respectively.Higher diffusion coefficient of chloride can inhibit sulfate erosion to some extent.Mineral admixtures can improve the durability of concrete.Under sea water erosion,the damage process of high performance concrete and reinforced concrete is relatively slow due to the interaction of various ions.