The difference between FRP strengthening and bonded steel plate

According to the design of equal strength, the glue dosage of the two schemes is equivalent. The FRP strengthening are much cheaper than the sticky steel plate. The cost of the two schemes is flat when short carbon fiber fabric are taken.

Item	Bonded steel plate	CFRP strengthening
Need long-term maintenance	Steel is easy to rust and needs long-term maintenanc	Corrosion resistance, no need for late maintenance
Is it convenient to operate on the spot	The steel plate is heavier, harder and inconvenient to operate in the fiel	Carbon fiber fabric is light weight and convenient for construction
Need to close the traffic	The bonding between steel plate and concrete will take several days to maintain. The disturbance will affect the quality of bonding, so it is necessary to close the traffic	Carbon fiber needs to be applying carbon fiber adhesive only, no need to shut down the traffic
Is there any damage to the original structure	In order to ensure the bonding effect between steel plate and concrete, many bolt connections are needed to increase the workload and damage the original structure	Don't add anything else, no damage to the original structure
Surface treatment	The surface treatment of concrete is relatively high, and the surface of the steel plate also needs to be treated	The surface treatment requirements of concrete are low, and the surface of carbon fibers need not be treated.
Cost	According to the design of equal strength, the glue dosage of the two schemes is equivalent. The carbon fiber fabric are much cheaper than the sticky steel plate. The cost of the two schemes is flat when short carbon fiber fabric are taken.

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HM-20 Unidirectional Carbon Fiber Wrap

High strength, unidirectional carbon fiber wrap pre-saturated to form a carbon fiber reinforced polymer (CFRP) wrap used to strengthen structural concrete elements.