Experimental Study On Bending Property Of Reinforced Concrete Beam Exposed To Simulated Acid Rain Environment

Acid rain is the main corrosion influence factor of reinforced concrete structure, which causes bearing capacity of structure deterioration. So, reveal the damage law of reinforced concrete beam mechanical property in acid rain environment, It is the premise and foundation to study on the bearing capacity and durability of whole structure. Funded by the National Science Foundation of China study on reinforced concrete bridge bearing capacity in chemistry corrode and vehicle coupling effect, the bending property develop law of reinforced concrete beam exposed to simulated acid rain environment is researched. Consulting the compose of acid rain in typical city in our country, pH 1.5 and pH 2.5 acid liquor are collocated to simulate acid rain circumstance. For the purpose of simulated rainfall, sprinkler has been made in this article. Experimental on 11 pieces of reinforced concrete beams in corrosive environment of soaking and spraying(the one of them is control beam)to study on bending property of concrete reinforced beam has been made. In this article I analyzed the influencing factors of ultimate load,cracking load,member stiffness,concrete damage depth and so on. Arrival at a conclusion, dry-wet circulation experimental in replacement of spraying experimental is suitable.In the end, for the purpose of revealing interior structure of concrete corroded in micro levels, observing damage course of concrete interior structure.