Experimental Research On Flexural Behavior Of Waste Steel Fiber Rubber Recycled Aggregate Concrete Beam

With the continuous development of the civil engineering industry and the automotive industry in recent years, the growing amount of waste concretes and rubber tires have resulted in resources, environment and other issues, which has gradually become the hot spot of national concern. How to deal with waste concretes and discarded automobile tires has become an urgent problem to be solved.In this paper,9Waste Steel Fiber Rubber Recycled Aggregate Concrete (WSRRAC) beams with the dominate parameters of replacement rate of recycled coarse aggregate (30%,50%,70%), waste steel fiber rubber content (4%,6%,8%) and reinforcement rate (0.86%,1.17%,1.53%) were made by using the orthogonal design method, and1ordinary concrete beam was made as compared beam, all of these beams were used to flexural behavior test. Also3standard cube (150mm×150mm×150mm) are made to cube compressive strength text and3cylinders (ΦD150mm×300mm) were made to cylinder axial compression test. The main work includes the following three aspects:(1) The failure form of waste steel fiber concrete cubes and cylinders and the effects of recycled coarse aggregate with different replacement and waste steel fiber rubber with different content on the cube compressive strength and the cylinder axial compression strength were analyzed by testing those30cubes and30cylinders. Also research and analysis the stress-strain curve of WSRRAC, providing relevant calculating parameters for the finite element analysis;(2) Analyzing the failure form of normal section of flexural beams and checking the applicability of plane-section assumption when calculating the bearing capacity after testing bending property of1ordinary beam and9WSRRAC beams. According to the orthogonal analysis form, the effect of recycled coarse aggregate, waste steel fiber rubber and reinforcement rate on ultimate bearing capacity were analyzed, and also research and analysis the applicability of the existing standard and regulations calculational formula of the bearing capacity on WSRRAC beams;(3) Basing on the trial, large universal finite element software ABAQUS was used to simulate flexural behavior experiment of WSRRAC beam, The results of numerical analysis are compared with experimental results.