Research On Physical And Mechanical Properties Of Rubber Cement Concrete

The asphalt mortar is a kind of heterogeneity compound material which is composed together by rubber powder and ordinary cement concrete,with rubber and the excellent properties of cement concrete,It have broad application prospects in highway construction.This paper use rubber cement concrete as the research object,the rubber powder of cement concrete admixture of the influence of physical and mechanical performance,analyzing its application in highway engineering.This paper investigates the test raw material from quality and selected the stability of quality tests using Angle selected rubber powder, cement, sets and other related materials, meanwhile experiments confirm rubber powder mixed in the cement, cement and setting time after that rubber powder over-indulgence extend you can play the slow coagulation effect.Through the mix design of cement concrete identify various test materials dosage and test methods. Will the rubber powder mixed with different proportion to cement slurry respectively net, cement mortar and cement concrete, analysis of rubber powder mixed and different dosage of cement concrete strength influence. Test proof, rubber powder adding later, concrete flexural strength and compressive strength of all have certain reduce the compressive strength, flexural strength reducing faster than the speed of the lower, but its toughness, elastic modulus, crack-resistance are as the increase of the admixture of rubber powder, and rubber powder is enhanced by the admixture of the more obvious, the greater the effect. In addition, rubber powder on the surface can effectively enhance the cement concrete strength. Trials were will rubber powder wash, sodium hydroxide solution and hydrochloric acid solution of treatment to cement mortar strength as the evaluation index, the results showed that strength have increased significantly with NaOH treatment, and best effect. Pressure from rubber cement concrete the stress-strain curve knowable, rubber concrete compression maximum load, the maximum strain increases, lower modulus of elasticity decreased, toughness increaseTest analyses frost resistance of concrete, rubber shock resistance, shrinkage performance and anti-permeability etc way-use performance, the results showed that rubber concrete a benchmark concrete anti-freeze performance is good, in multiple freeze-thaw cycles can keep remains after the structural integrity of; Shock resistance test shows that when the admixture of rubber powder to 5%, specimen impact toughness increased 33%; Shrinkage performance test results show that with the rubber powder dosage increase specimens decrease shrinkage, rubber powder to 5% admixture specimens shrinkage of concrete half; only benchmark Experimental results show that the anti-permeability specimens ooze water with high and rubber powder dosage approximation is inversely proportional to the admixture of rubber powder, along with increased, anti the coefficient decreases, and anti-permeability enhance mixing rubber powder concrete way-use performance after all have a greatly raised, and the test within the scope of the admixture of admixture, along with the increase of rubber powder, rubber concrete way-use performance with enhanced.