摘要:Acid-Freezing rain is one of the most calamity weather phenomenon in Northeast China, it often occurs in early winter or late winter and early spring. In this paper, to investigate the mechanics property after the acid-freezing rain acting, different concrete grades with C15, C25 and C35 were prepared. The acid-freezing rain acting on the concrete was simulated in the laboratory conditions for 7d, 14d and 21d. With the triaxial rock mechanics testing machine, the compressive properties were investigated. The results showed that the surficial layers of the concretes were damaged under the acid-freezing rain and the compressive strength awfully decrease due to the intergranular suction losing.