Experimental Study On The Durability Of Rubber Concrete

The new composite material, made up of by max with different specifications rubberparticles smashed from waste tires and other rubber products in normal concrete, which calledwaste rubber concrete. Existing research and engineering practice shows that compared withordinary concrete, the compressive strength, tensile strength and other static properties ofrubber concrete have declined, but its durability, impact resistance, thermal performance etchave get different degrees of improvement, and the development and application ofrubberized concrete provide a new way for the recycling of waste rubber, and also withsignificant environmental benefits. While compared with the mechanical properties of rubberconcrete, the study of durability is less, and the lack of systematic research and regularityconclusions have hindered the promotion and application of rubberized concrete.In this paper, the durability of rubber is the main study objects, and the test study is themain means. The rubber concrete is made by replacing fine aggregate with5-8mesh,30-40mesh and60-80mesh particle size of the rubber particles at equal volume substitution ratiodivided into5%,10%and15%. As the focusing study objects, the anti-freeze-thaw cycles,resistance to chloride ion penetration and anti-carbonation performance durability index havebeen systematically studied, and also the coupling effect of the anti-freeze-thaw cycles andresistance to chloride ion penetration have been studied, obtained the impact of the law of thedurability of rubber concrete with the change of rubber particle size and dosage, andestablished the durability index deterioration of the model based on test results and empiricalformulas. The results show that the incorporation of rubber particles significantly improvedfreeze-thaw resistance of concrete properties and resistance to chloride ion penetration, thesmaller the particle size of the rubber, more obvious the improve effects, the best substitutionratio of anti-freeze-thaw cycle is about10%, while its5%to resistance to chloride ionpenetration. Also the incorporation of rubber particles can improve the resistance of concretecarbonation, but the effect is not obvious, the optimal dosage is10%. The chloride ion penetration of rubber concrete decreased significantly after freeze-thaw cycles, and thedownward trend is more obvious with the increase of freeze-thaw cycles, considering the anti-freeze-thaw cycles and resistance to chloride ion penetration, the optimal dosage is10%.