Experiment Study On Resistance To Magnesium Sulfate Corrosion And Chloride Corrosion Of Crumb Rubber Concrete

Rubberized concrete is a new type of concrete being studied by many scholars in the world. Due to the addition of worn-out tire rubber granules, the compressive strength and splitting strength of rubberized concrete will be lower than normal concrete, but the destroy form will be changed from brittle to ductile with large extension deformation. Now, most studies on rubberized concrete focused on the compressive strength,tensile strength,bending strength, and nothing concerning to the durability of rubberized concrete in the salty environment.In this paper, under the special environment, an accelerated experiment is carried out by using a dipping-drying circulation (in artificial salty water) method in laboratory condition. You will find here, the erosive rules of rubberized concrete under the action of the salty water are studied respectively with different volumes of rubber particles, different water-cement ratio and different fly ash content. And the mechanisms of salty corrosion are analyzed. Furthermore, the measures to improve rubberized concrete's resistance to salty corrosion are also discussed.This experiment has proved that: (1)With the same water-cement ratio, the more the volumes of rubber particles add to the concrete, the lower the compressive strength of the rubberized concrete would be. (2)The resistance to salty corrosion of rubberized concrete is a little higher than that of common cement concrete and reducing the water-cement ratio or increasing the cement content properly can improve the rubberized concrete's resistance to salty corrosion to a certain extent. (3)Fly ash rubberized concrete has a high resistance to salty corrosion and the resistance to corrosion of concrete can greatly improve, especially when super plasticizer is admixed with fly ash.