The Performance Research Of Cement Concrete With Waste Tire Rubber

Rubberized Concrete as a new type of concrete, compared with ordinary concrete has low elastic modulus, large damping, multi-energy dissipation, good crack resistance and other characteristics, which caused widespread interest in the field. Many experts and scholars at home and abroad have done a lot of research on the performance of rubberized concrete, but mixed with small particle size of fine powder is still rarely reported. This paper studies rubberized concrete mixed with powder particle size of 80 mesh,100 mesh,120 mesh fine rubber powder, tested the basic mechanical properties of rubberized concrete, include cube compressive strength, axial compressive strength, splitting tensile strength, then established a linear relationship between them. Experimental Analysis of rubberized concrete the effect of volum, particle size, and concrete strength on the resistance of chloride ion penetration and toughness. Based on the test, compare finite element analysis value with the test value.The results of this paper are:(1) through 16 sets basic strength of rubberized concrete mechanical properties, including cube compressive strength, axial compressive strength, splitting tensile strength, find out their relationship by linear regression method, regression analysis showed good correlation accuracy. (2)the toughness test use the load-deflection area under the curve, fracture energy, toughness index to measure the toughness of rubberized concrete, results showed that in 80 mesh, 100mesh,120 mesh rubber powder diameter range, the concrete with 100 mesh has best toughness, while the optional 100 mesh rubber powder; in 5kg/m3 to 30kg/m3 range, with the increasing content of toughness has been increasing. (3) Rubberized concrete permeability resistance of chloride ion test results showed that in 80 mesh,100 mesh,120 mesh rubber powder particle size range, the best resistance to chloride ion penetration is the 120 mesh rubber powder, while the use of 100 mesh rubber powder; content in 5kg/m3 to 30kg/m3 range, as the content of the increse, permeability resistance of chloride ion has been a positive trend change. (4)Take some numerical simulation about the mechanical properties of rubberized concrete with finite element software Ansys. Analysis the cube compression test, axial compression tests, splitting tensile strength test, Flexural Toughness of numerical analysis with the specific concrete element Solid65 in Anasys, the calculate result shows the maximum stress was similar to the experimental values which means the model is reasonable and can simulate the actual experiment.According to this paper, the strength of rubbrized concrete has decreased, the toughness and resistance to chloride ion penetration compared with the base concrete without the rubber powder were improved. The rubberized concrete mixed with 100 mesh rubber powder has the best toughness.