The Pre-stressed CFRP strip/plate/laminate reinforcement method is suitable for strengthening the reinforced concrete members subjected to bending, tension and large eccentricity when the section is small or the reinforcement is insufficient. This method is not suitable for reinforcement of members with plain concrete members, including longitudinal reinforcement steel bars whose reinforcement ratio is less than 0.2%.

At present, the width of Pre-stressed CFRP strips is 500mm and 100mm, and the common thickness is 1.2mm, 1.4mm, 2.0mm and 3.0mm.

Brief introduction of Pre-stressed CFRP strips

The Pre-stressed CFRP strips reinforcement system is a kind of active reinforcement technology applied to bridge, long-span and other flexural members. Through the stretching of Prestressed CFRP, the bearing capacity of members is improved, meanwhile, the disturbance and deformation are reduced, and the cracks of closed components are reduced. It has the advantages of light weight, high strength and aging resistance of carbon fiber material, and improves the utilization ratio of carbon fiber tensile strength at the same time.

Pre-stressed CFRP strips application

1) Reinforcement of RC bridges.

2) The reinforced concrete bridge girder, box girder, T beam reinforcement;

3) For civil buildings, industrial buildings and other buildings, the flexural strengthening of long span beams and plates and reinforcement of cracks should be controlled.

4) Strengthening bearing capacity of long-span reinforced concrete bridges are widely applied to prestressed or non prestressed bridge structures.

Pre-stressed CFRP strips key features

The predominant advantages of Prestressed CFRP are active reinforcement, and the use of prestressed carbon plate to reinforce, almost without increasing self weight and unloading. Reduce the structural deformation, effectively improve the bearing capacity of the structure, and give full play to the tensile strength of carbon fiber.

Pre-stressed CFRP strips system

Pre-stressed CFRP strips consists of three parts: prestressed CFRP plate, carbon plate sdhesive and tension anchor device.

Pre-stressed CFRP strips construction steps

1. location and paying off

2. polish

3. drilling hole

4. grooving

5. repairing and leveling

6. planting anchor

7. installing bounding box

8. installing anchor block

9. fixing carbon fiber laminate

10. fixing jack and high strength anchor bolt

11. prestretching

12. applying epoxy resin 

13. prestretching

14. removing the thread rod

15. tablet fixing 

16. finished product protection