1.The tensile strength , elastic modulus and ultimate elongation
According to the specification, the carbon fiber cloth tensile strength ≥ 3400MPa, tensile modulus ≥ 230000MPa, elongation ≥ 1.6%.
2.Carbon fiber cloth per unit area have a great deviation
In generally,externally bonded CFRP wrapping, the unit area mass ≦ 300g / m2, carbon fiber cloth per unit area tolerance of ± 3%.
3.The number of K fibers of carbon fiber cloth is not acceptable
Carbon fiber wrap for civil engineering is strictly prohibited to use large tow carbon fiber instead. However, a large number of 15k, 18k, 24k, 36k, or even 48k carbon fiber to impersonate 12k.Such a reinforcement project will be a serious problem。
4.Carbon fiber cloth lack of latitude and weft
If the CFRP wrapping appear defects, will significantly affect the structure, component of the force performance or durability.