Carbon Fiber Strengthening Improves The State Of Concrete Structures

Before the project is reinforced by the pasted carbon fiber wrap method, the construction personnel need to conduct further inspections according to the actual situation of the project strengthening, combined with the corrosion of the internal structural steel bars, and have a more in-depth understanding of the structural damage.

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The project has a total of 11 floors, of which the basement and the upper 6 floors within the reinforced concrete strength design grade is C40, and the 6 floors and above the reinforced concrete strength design grade is C30. After the construction of the 1st to 3rd floors of concrete is completed, 4 weeks of curing operations are required. 


After the maintenance and construction, it was found that the concrete frame structure did not meet the design requirements, and engineering renovation and strengthening must be carried out.


Before the project is reinforced by the pasted carbon fiber wrap method, the construction personnel need to conduct further inspections according to the actual situation of the project strengthening, combined with the corrosion of the internal structural steel bars, and have a more in-depth understanding of the structural damage. Then, according to the analysis of the structural stress, the on-site strengthening plan of the pasted carbon fiber wrap method and the reasonable selection of strengthening materials are carried out to prevent potential safety hazards after the engineering renovation and strengthening.


Carbon Fiber Strengthening Improves The State Of Concrete Structures



In terms of the strengthening of functional reinforced concrete structures, relevant engineering construction units, organizational design units, etc. need to conduct a comparative analysis of multiple strengthening schemes. Because of the advantages of carbon fiber wrap strengthening, such as light weight, good corrosion resistance, and wide application, carbon fiber wrap strengthening is selected as the final strengthening plan.


Before the on-site strengthening of the reinforced concrete, the construction personnel first need to carry out reasonable designs such as carbon fiber wrap materials and strengthening methods, and the content of the carbon fiber strengthening design must be within the scope of engineering renovation and strengthening.


The thickness of the carbon fiber wrap material is 0.167mm, the specification is 300g/m2, the tensile strength must exceed 3400MPa, and the elastic modulus must exceed 2.4×105MPa.


Carbon fiber wrap strengthening is a relatively new type of strengthening. Carbon fiber wrap strengthening has the advantages of short construction time, simple operation and good strengthening effect. There is a lot of room for development in engineering renovation and strengthening.

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