What is the situation of using carbon fiber cloth What is the situation of using adhesive steel glue to reinforce?
1. Look at structural deformation: The elastic modulus of carbon fiber cloth and the adhesive steel are basically the same as that of steel. The tensile capacity of Xianghuan concrete carbon fiber cloth is 8 times that of steel. If the structure of the building has undergone large deformation, a carbon fiber cloth with greater strength is needed; but if the deformation force is small and the load capacity of the building components is large, in order to reduce the stress hysteresis and ensure that the material fully performs its performance, adhesive steel is preferred to reinforce .
2. Depend on the requirements: carbon fiber and steel elastic modulus are basically the same. If the two have the same force value, the cross-section required for bonded steel reinforcement should be relatively large, and the structural stiffness of bonded steel reinforcement exceeds that of carbon fiber cloth. If the bending resistance of the two is the same, the deflection and crack width of the adhesive steel reinforcement are smaller than that of the adhesive carbon fiber cloth reinforcement. Advantages and Disadvantages of Carbon Fiber Performance and Countermeasures of
Pros and Disadvantages of Carbon Fiber Performance Comparison of other reinforcement materials:
(1) Tensile Strength : The tensile strength of carbon fiber is about 10 times that of steel.
(2) Elastic Modulus: The tensile elastic modulus of carbon fiber composite is higher than that of steel, but the tensile elastic modulus of aramid and glass fiber composites is only half and one-quarter of that of steel.
(3) Fatigue strength: The fatigue strength of carbon fiber and aramid fiber composites is higher than that of high-strength wire. Under the action of alternating stress, the fatigue limit of metal materials is only 30% to 40% of the static load intensity. Since the fibers and matrix composite can alleviate crack propagation and the possibility of internal force redistribution of fibers, the fatigue limit of the composite material is relatively high, about 70% to 80% of the static load strength, and there are significant signs of deformation before destruction.
(4) Weight: about one fifth of the steel.
(5) Comparison with carbon fiber board : Carbon fiber sheets can be pasted on structural surfaces of various shapes, while plates are more suitable for regular component surfaces. In addition, since the amount of base resin used is greater than that of sheet material and has a larger thickness when pasting the sheet material, the bonding strength with the concrete interface is not as good as that of the sheet material.
carbon fiber is mainly divided into polypropylene nitrile (PAN)-based carbon fiber and asphalt -based carbon fiber according to the raw materials and production methods. Carbon fiber products include PAN-based carbon fiber (high strength type) and asphalt-based carbon fiber (high elastic type).
Zhengxiang Technology undertakes various reinforcement projects: enlarge the cross section, replace the concrete, add prestressed , sticky steel steel , sticky carbon fiber, wire rope mesh plus polymer mortar , concrete plus reinforced bar mesh, prestressed struts, enlarged cross section, steel component weld reinforcement, crack repair, planting tendons, anchor bolts, grouting, etc.
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