Hybrid Fiber Reactive Powder Concrete Steel Wire Mesh Study On Reinforcement Materials

Hybrid fiber reinforced concrete steel wire mesh reinforcement material is used for reference to the concept of active powder concrete,and it is studied on the basis of high performance composite mortar reinforcement material.Through the study of strengthening materials,the scheme can not only meet the requirements of the concrete strength,but also can meet the requirements of the durability of the material.Test by the incorporation with the pozzolanic activity of the mixed material to improve the strength and durability of RPC composite mortar,incorporation of steel fiber and polypropylene fiber to improve the impact resistance,anti splitting performance still mixed with the other materials improve the workability of concrete and operational performance.In order to test the study of the composite material is applicable to the actual project,the test of 6 concrete beams and precast reinforced concrete beams,and the structure of the checking and testing.The specific contents of this paper are as follows:(1)Followed by the incorporation of mix ratio test of different materials based slurry.In the process of each material on the basis of paste strength and durability,so as to determine the best dosage;secondly,through the admixture and fiber respectively single doped,Codoped on the basis of slurry were modified to determine the optimum content of the materials.Finally,according to the reinforced concrete members with different strength,providing strength to match the RPC composite mortar mixture ratio design.(2)Through the test of SEM,XRD and other micro method research on RPC composite mortar durability and microstructure.Mechanical activation to excite the activity of fly ash;by chloride ion flux determination instrument of RPC impermeability;than the surface area and pore size analyzer for the determination of RPC hole size;by impact test and split test incorporation into the steel fiber and polypropylene fiber RPC impact resistance and toughness.(3)By checking the RPC composite mortar and concrete beam of elastic modulus size and of the laws of the stress-strain curves,ultimately determine reinforced beam matching RPC composite mortar mix;calculated is beam section and oblique section beam.The maximum bearing capacity,determine the loading scheme and construction technology.(4)6 prefabricated concrete beams,3 beam cross section and 3 oblique beams,respectively,after a loading and loaded two times after reinforcement test.Based on analysis of the test results concrete beam flexural crack width and deflection size,stress strain curve changes were compared and analyzed.Through the microscopic analysis was conducted on the RPC composite mortar and concrete interface.(5)Through the finite element simulation analysis,using ANSYS software established mechanical model for the concrete beam,under five levels of loading,ratio of reinforcement and reinforcement beams vertical displacement,reinforced concrete beam maximum displacement than reinforcement concrete beam of the maximum displacement changes to a small amount,reinforced concrete beam stiffness and flexural performance is more superior.