Pultruded Carbon Fiber Strip

What is externally bonded CFRP plate?

  Carbon fiber plate, also called carbon fiber strip or laminate is pultruded from matrix of carbon fiber and epoxy resin through die with specific inner shape. It has at least 5 times tensile strength than the steel, whilst it is of such light weight. It is acid resistant, alkali resistant, non-corrosion, fatigue resistant, age resistant. It’s used in structural strengthening, structural reinforcement, concrete repairs and seismic retrofitting.The carbon fiber plate can be directly bonded to the structure after preparation of the structure surface to provide additional strength to the structural elements, no matter concrete, masonry or timber. The adhesive, also called putty, is two part resin system, 100% solid state. The CFRP plate is much easier to be applied than CFRP wrap, since you don’t have to worry about if the workers have saturated the CFRP wrap correctly, which is very crutial for the final strengthening result, succeed or fail. It has been consistently produced at same fiber and resin ratio. There’re 2 types of plate available, with or without peel ply coated. The carbon fiber plate without peel ply should be carefully cleaned to remove the dust and other particles to ensure the final bonding quality. In the other hand, the peel ply by which the plate is coated should be peel off before applying the plate. The plate surface will be clean and rough enough for the bonding process.

The laminate thickness may vary from 1mm to 5mm thickness, width may vary from 10mm to 120mm. Compared to steel plate for the same strengthening and reinforcement purpose, the carbon fibre strip is way thinner, so you don’t have to worry about the strip cross each other during the bonding process. One more note is that necessary cover and coating process should be taken to prevent the CFRP strip and resin from direct sunlight, which may change their chemical composition, leading to the declined mechanical properties.