Carbon Fiber cloth Reinforcement Construction Technology

Carbon Fiber Fabric (CFRP), as a high-performance structural reinforcement material, combines with matching impregnating adhesive to form carbon fiber composite material. This significantly enhances the tensile, shear, and seismic resistance of structural members. It is widely applied in reinforcement projects such as increased building loads, functional changes, material aging, insufficient concrete strength, crack repair, refurbishment and protection of components serving in harsh environments. This document focuses on the construction process and acceptance methods for carbon fiber fabric.

Carbon Fiber Fabric Construction Process Flow

1.Substrate Treatment:

Remove the surface rendering layer of the component and grind the concrete substrate smooth.

Grind the edges and corners of the component section into rounded corners with a radius not less than 20mm.

Thoroughly clean the substrate, ensuring it is clean, dry, and free of oil stains and loose material.

2.Applying Primer:

Perform positioning and marking according to the design drawings.

Evenly apply carbon fiber-specific primer onto the prepared concrete substrate.

3.Defect Repair and Leveling:

Use matching repair adhesive to fill larger defects such as holes, depressions, and exposed rebar on the concrete surface.

Ensure the repaired surface is level and meets bonding requirements.

4.Cutting Carbon Fabric:

Precisely cut the carbon fiber fabric according to the design dimensions and on-site markings.

Pay attention to the fiber direction and minimize waste.

5.Mixing and Applying Impregnating Adhesive:

Strictly weigh the resin main agent and hardener in the proportions specified in the product manual.

Mix thoroughly at low speed until the adhesive liquid is uniform in color, free of bubbles, and without sedimentation or separation.

After the primer reaches a tack-free state (surface dry), evenly roll the prepared impregnating adhesive onto the designated bonding area.

6.Applying Carbon Fabric:

Lay the cut carbon fiber fabric smoothly onto the adhesive-coated area according to the marked position.

Along the fiber direction, use a dedicated plastic scraper (or rubber roller) to fully scrape, press, and roll from the center outwards.

Eliminate air bubbles, ensuring the fabric surface is flat, tightly bonded, and adhesive evenly exudes.

7.Secondary Adhesive Application (Impregnation):

Evenly roll impregnating adhesive again onto the surface of the already applied carbon fiber fabric.

Fully saturate the fiber bundles to ensure adhesive saturation.

Continue scraping/pressing or rolling to further eliminate any remaining bubbles, ensuring the fabric layer is compacted, flat, and wrinkle-free.

8.Curing:

After construction is complete, conduct natural curing under the recommended environmental conditions (temperature, humidity).

Avoid disturbance, moisture, direct sunlight, or loading during the curing period.

For multi-layer application: Wait until the previous layer of carbon fabric is tack-free, then repeat steps 5-8 for the next layer. Perform final unified curing.

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