Investigation On Fiber Mesh Corrosion Resistance And Its Effect On Mechanical Properties Of Concrete

Fiber mesh reinforced cement-based composites are widely used in exterior insulation, landscape colum, artware and other structures. Developing the application of fiber mesh in bearing structure is helpful to make full use of its good mechanical properties, especially two-way effects. Alkali environment of cement-based materials have a strong corrosive effect on the mesh, so the long-term durability of fiber mesh reinforced cement-based composites has been a difficult problem for engineers. Fiber mesh is made of filament fiber and corrosion resistance of filament fiber is the essence of fiber mesh. In view of the above problems, this paper mainly does the following research.(1) Study on influence of different fiber mesh on durability of cement-based compositesThree different kinds of glass fiber mesh were used as reinforcement material to make polymer mortar. The influence of different fiber mesh on the ultimate strength and flexural strength of polymer cement before and after aging was analyzed based on the accelerated aging principle.(2) Study on corrosion resistance of filament fiberSome work was done on glass fiber and basalt fiber before and after corrosion in sodium hydroxide solution. The micro images of fibers were analyzed to show corrosion degree by using SEM. The change of element content were analyzed to discuss the influence of zirconium content on corrosion resistance by EDS. The change of Si-0 skeleton before and after corrosion was analyzed by FT-IR, and the corrosion mechanism of the fiber was explained from the internal composition.(3) Study on flexural behaviors of fiber mesh reinforced concrete beamsGlass fiber mesh and basalt fiber mesh were placed at the bottom of concrete beams in the test. Then according to DBV and RILEM TC 162-TDF, load-deflection curves, load-CMOD curves, related strength and toughness were tested to analysis the influence of fiber mesh on concrete beam.(4) Study on fiber mesh reinforced concrete panelsFiber mesh reinforced concrete panel exhibits the load-carrying capacity in two directions. Experimental investigations were performed on fiber mesh reinforced concrete and traditional steel mesh reinforced concrete in accordance with EFNARC. Crack propagation were recorded throughout the loading procedure. Then, mechanical performance and energy absorption ability were comparatively analyzed.