Application of multilayer carbon fiber sheet for concrete repair
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Application of multilayer carbon fiber sheet for concrete repair
Sometimes the thickness of the single-layer carbon fiber sheet is low and the effective cross-section is small, even if its strength is high, it is inevitable that the increase in bearing capacity will not meet the requirements. When the design cross-sectional area of the carbon fiber sheet is larger than the cross-sectional area that a single carbon fiber sheet can provide, it can be reinforced by sticking multiple layers of carbon sheet. Continuity should be paid attention to when multilayer carbon sheet
FRP composite materials can improve the structural capacity and durability, and have become one of the common methods of structural reinforcement.
Fiber composite materials for engineering structure reinforcement, including carbon fiber, glass fiber and aramid fiber. Among the three types of fibers, carbon fiber composites have higher strength and moudles, and are most widely used in structural reinforcement.
Carbon fiber composites can only withstand tensile stress during reinforcement, so they can be used for bending, compression, axial compression, large eccentric compression and reinforcement of tensile members in concrete structures.
When do you need multiple layers of carbon fiber sheet for reinforcement?
Sometimes the thickness of the single-layer carbon fiber sheet is low and the effective cross-section is small, even if its strength is high, it is inevitable that the increase in bearing capacity will not meet the requirements. When the design cross-sectional area of the carbon fiber sheet is larger than the cross-sectional area that a single carbon fiber sheet can provide, it can be reinforced by sticking multiple layers of carbon sheet. Continuity should be paid attention to when multilayer carbon sheet is pasted, so as to avoid long time affecting the dipping and pasting effect of colloid.
On the other hand, the strength of carbon fiber sheet needs to work together with the concrete structure. With the increase of the number of layers of carbon fiber sheet, anchoring measures will become difficult to guarantee, and it is easy to peel off. Therefore, the number of carbon fiber sheet should not exceed 4 layers. When the design and calculation to obtain a cross-sectional area higher than that of 4 layers of carbon sheet, you can consider using carbon fiber plate for reinforcement. The role of carbon fiber plate in reinforcement is equivalent to 4-8 layers of carbon fiber sheet, which can make the bending members withstand higher loads.
Advantages of HORSE CONSTRUCTION CFRP Plate Strengthening
• Short construction period • No maintenance required • Easy installation, low installation cost • Light weight, no influence to original structure • Corrosion resistance, long-term effect of 50 years • Cost effective compared with other retrofitting method • 1 layers of CFRP plate is equivalent to 4-8 layers of CFRP fabric
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High strength, unidirectional carbon fiber wrap pre-saturated to form a carbon fiber reinforced polymer (CFRP) wrap used to strengthen structural concrete elements.
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