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R-CF-UD 200gsm Construction Reinforcement Unidirectional Carbon Fiber Fabrics UD Carbon Cloth for Beams, Columns, Walls, Floor Slabs, And Piers

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Unidirectional carbon fiber fabric is primarily used for reinforcing structural points in building structures such as beams, columns, walls, floor slabs, and piers. Our company selects high-quality, high-strength carbon fibers and processes them through a specialized process to create unidirectional carbon fiber fabric. This fabric features uniform, straight carbon fiber distribution, minimal thickness variation, and easy resin penetration, ensuring the carbon fiber's reinforcing properties are fully and effectively utilized.

R-CF-UD 200gsm Construction Reinforcement Unidirectional Carbon Fiber Fabrics

Performance Items 200g LV1 200g LV2
Gram weight (g/㎡) 200 200
Thickness (mm) 0.111 0.111
Tensile strength International Standards ≥3400 ≥3000
Actual test data 3710
3325
Modulus of elasticity International Standards ≥2.3*10⁵ ≥2.1*10⁵
Actual test data ≥2.31*10⁵ ≥2.2*10⁵
Elongation(%) International Standards ≥1.7 ≥1.5
Actual test data 1.7 1.74

Product Features

Core Mechanical Performance Advantages

  • Ultra-High Tensile Strength

  • High Elastic Modulus

  • Lightweight and High-Strength

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Unidirectional Carbon Fiber Fabrics
Unidirectional Carbon Fiber Fabrics

Convenient and Efficient Construction

  • Simplified operational procedures

  • Short Construction Period

  • Flexible Cutting

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Excellent Durability and Stability

  • Strong Corrosion Resistance

  • Excellent Aging and Weather Resistance

  • Non-Magnetic and Excellent Insulation

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Unidirectional Carbon Fiber Fabrics

UD carbon fiber cloth (20)


Wide Applicability and Compatibility

  • Compatible with a variety of structural types

  • Meets diverse reinforcement needs

  • Minimal Impact on the Original Structure

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Application of Carbon Fiber Reinforced Polymer

Carbon fiber reinforced polymer (CFRP) is one of the most widely used high-performance reinforcement materials in civil engineering. With its advantages of high strength, lightweight, corrosion resistance, and ease of construction, it has become a core material for reinforcing and renovating concrete, steel, and masonry structures. Its application scenarios span the entire lifecycle of a building structure, from improving the performance of new structures to repairing and extending the life of existing structures, and even for emergency reinforcement after disasters. Specific applications can be categorized by structural type and reinforcement objective as follows:

Core Application Scenarios:

The reinforcement function of carbon cloth essentially involves forming a "synergistic force-bearing system" with the original structure through the adhesive (epoxy resin). This transfers the carbon cloth's high strength (tensile strength approximately 7-10 times that of ordinary steel bars) to weak areas of the structure, thereby compensating for insufficient load-bearing capacity, rigidity deficiencies, or durability issues in the original structure.

The application focus varies significantly across different structures:

1. Concrete Structure Reinforcement (Most Mainstream Application)

Concrete structures are the core application for carbon cloth reinforcement, including key components such as beams, slabs, columns, walls, and joints. The core issues addressed are "inadequate bearing capacity," "crack control," and "ductility improvement." Specific applications are shown in the table below:

Reinforced components

Core issues

Carbon cloth reinforcement methods

Typical scenarios

Concrete beams

Insufficient bending bearing capacity (excessive deflection, bottom cracking), insufficient shear bearing capacity (oblique cracks at beam ends)

- Bending reinforcement: 1-3 layers of carbon cloth are pasted on the bottom of the beam (parallel to the direction of force)

- Shear reinforcement: U-shaped or ring-shaped carbon cloth is pasted on the side of the beam (perpendicular to the direction of force)

Renovation of floor beams of old office buildings (increased load), repair of bridge main beams (increased vehicle load)

Concrete columns

Insufficient axial/eccentric compressive bearing capacity (column cracking, deformation), insufficient ductility (brittle failure due to earthquakes)

- Hoop-wrapped carbon cloth (creating a "constraint effect", similar to stirrups)

- Carbon cloth glued to the biaxial tension zone (resisting horizontal forces)

Seismic reinforcement of frame structure columns (improvement of seismic resistance of old buildings), load-increasing transformation of basement columns

Concrete slabs

Insufficient bending bearing capacity (cracks at the bottom of the plate, insufficient bearing capacity), insufficient local shear resistance

- Carbon cloth strips are pasted along the stress direction on the bottom of the board (unidirectional or bidirectional)

- Radial carbon cloth is pasted on the board column nodes (to resist punching shear)

Adding partitions/equipment to residential floors (increased load), converting garage roofs to commercial use

Concrete walls

Insufficient shear bearing capacity (diagonal cracks in the wall) and insufficient out-of-plane bearing capacity

- Horizontal carbon cloth is pasted on the wall (to resist horizontal shear force) - Bidirectional carbon cloth mesh is pasted on the wall (to improve out-of-plane stiffness)

Seismic reinforcement of shear wall structures, anti-seepage and reinforcement of basement retaining walls

Joints

Insufficient bearing capacity of the core areas of beam-column joints and wall panel joints (earthquakes easily lead to damage)

- Paste the node area with a "tic-tac-toe" or ring-shaped carbon cloth (wrapping the core area)

Seismic retrofitting of frame structure nodes (old building nodes without stirrups or insufficient stirrups)

Unidirectional Carbon Fiber Fabrics

2. Steel Structure Reinforcement

Steel structure reinforcement requirements are often focused on increasing bearing capacity, improving stability, and repairing damage. Carbon cloth offers the advantages of eliminating the need for welding (preventing damage to the steel structure from high temperatures) and does not increase the structure's deadweight. Specific applications include:

Reinforcement of Tension/Compression Members: Carbon cloth is applied to the flanges or webs of steel structures to increase tensile/compressive bearing capacity (e.g., when steel columns or beams have insufficient cross-sections).

Joint Reinforcement: When welds crack or bolted connections are insufficient at steel joints, carbon cloth is applied around the joints to disperse stress concentrations (e.g., at steel truss joints and steel frame beam-column joints).

Fatigue Damage Repair: When fatigue cracks develop in steel structures subjected to alternating loads (e.g., bridges and factory crane beams), carbon cloth is applied to seal the cracks, preventing them from propagating and extending fatigue life.

Unidirectional Carbon Fiber Fabrics

3. Masonry Reinforcement

Masonry structures (brick walls and columns) have high rigidity but very low tensile strength, making them susceptible to cracking due to temperature fluctuations, settlement, or earthquakes. Carbon cloth is primarily used for:

Wall Anti-Crack/Seismic Reinforcement: Attaching carbon cloth horizontally or vertically to the surface of brick walls increases the tensile and shear resistance of the wall and reduces cracking (e.g., brick walls of old residential buildings and historical buildings);

Brick Column Reinforcement: Wrapping axially compressed brick columns with carbon cloth circumferentially creates a constraint and increases compressive bearing capacity (e.g., brick columns of old factory buildings and fences).

Unidirectional Carbon Fiber Fabrics

4. Special Structural Reinforcement

Bridge Structures: Flexural reinforcement of main beams (using carbon cloth on the bottom), seismic reinforcement of bridge piers (using carbon cloth on the circumferential surface), and reinforcement of the lower slab of bridge deck pavement (using carbon cloth to improve crack resistance). The lightweight nature of carbon cloth avoids adding weight to the bridge.

Tunnel Structures: When cracks or leaks occur in the tunnel lining concrete, carbon cloth can be applied to the inside to seal the cracks and increase lining stiffness (e.g., subway tunnel and highway tunnel repairs).

Historical Buildings/Cultural Relics: Reinforcement of historical buildings (e.g., ancient wooden structures encased in concrete or masonry) requires minimally invasive treatment. Carbon cloth application does not require demolition of existing components and can be combined with antique coatings, minimizing the appearance of the building (e.g., reinforcement of beams and columns in ancient city walls and temples).

Unidirectional Carbon Fiber Fabrics


How to Use Carbon Fiber Fabrics

I. Preliminary Construction Preparation

Material Preparation and Inspection

Core Materials: Carbon cloth (must meet the designed number of layers and width, such as 12K unidirectional carbon cloth, common specifications include 200g/㎡ and 300g/㎡), special epoxy resin adhesive (including primer, leveling adhesive, and impregnating adhesive, which must match the carbon cloth model and be within the shelf life. Ordinary glue is strictly prohibited).

Material Inspection: The carbon cloth surface must be free of damage, wrinkles, or oil stains; the adhesive must be free of delamination or sedimentation, and must be uniform and free of particles after stirring.

Environmental Control

Temperature: Construction and curing temperatures must be between 5°C and 35°C. Heating measures must be implemented for temperatures below 5°C, and shading and cooling must be applied for temperatures above 35°C.

Humidity: Ambient humidity must be less than 85%. Construction should be suspended in rainy weather or when the base surface is damp. Resume work after the base surface is completely dry.

Site Cleanup: The area around the reinforcement must be free of debris and dust. Stable scaffolding must be constructed for overhead work. Working overhead without protective gear is strictly prohibited.

Tool Preparation

Surface Preparation Tools: Angle grinder (with diamond grinding disc), chisel, hammer, wire brush, hair dryer or vacuum cleaner, rag;

Adhesive Application Tools: Mixing bucket, electric stirrer, scraper, roller (special defoaming roller, width matching the carbon cloth);

Carbon Cloth Handling Tools: Tape measure, wallpaper cutter, ruler.

II. Core Construction Process

Concrete structures (beams, columns, and slabs) are the primary targets for carbon cloth reinforcement. During the construction process, special attention should be paid to "surface flatness" and "wetting of the adhesive into the carbon cloth." The specific steps are as follows:

UD carbon fiber cloth

Step 1: Surface Preparation

Surface Cleaning: Use a hammer or chisel to remove loose concrete, laitance, and hollows from the reinforced area.

Roughening: Use an angle grinder (with a diamond grinding wheel) to roughen the surface perpendicular to the direction of carbon cloth application (to increase the bonding area).

Crack Treatment: If cracks are present, treat them according to their width. For cracks less than 0.2mm, clean them with a wire brush and then apply primer directly. For cracks greater than 0.2mm, first apply a specialized crack repair adhesive and allow it to cure before proceeding to the next step.

Dust and Oil Removal: Use a blower or vacuum cleaner to remove dust from the surface. Then, wipe the surface with a cloth dampened with acetone or alcohol to remove oil and impurities, ensuring the surface is dry and clean.


Step 2: Apply Primer

The function of primer is to penetrate the concrete pores, increase the base surface strength, and lay the foundation for the subsequent application of leveling adhesive/carbon cloth. Key points:

Primer Preparation: Pour primer components A and B into a mixing bucket according to the adhesive instructions. Mix with an electric stirrer for 3-5 minutes to ensure uniformity.

Primer Application: Use a scraper or brush to evenly apply the primer to the base surface, maintaining a thickness of 0.2-0.3mm (too thick will cause cracking, too thin will cause missing coating). The application area should be 50mm larger than the carbon cloth application area (to accommodate the edge transition).

Curing Time: The primer typically cures for 4-8 hours (at 25°C). After curing, the base surface should have a matte finish and be non-sticky to the touch.

UD carbon fiber cloth
UD carbon fiber cloth

Step 3: Surface Leveling

If any depressions or unevenness (>2mm) remain after polishing, fill them with leveling adhesive to ensure the carbon cloth adheres perfectly to the surface.

Leveling: Use a scraper to fill the surface with adhesive, smoothing and compacting it to a flatness tolerance of ≤2mm. Any sharp corners should be rounded with adhesive.

Curing: Allow the adhesive to cure for approximately 6-12 hours (at 25°C). After curing, lightly sand the surface with sandpaper to remove burrs and clean with a rag.

Step 4: Apply Impregnation Adhesive and Attach Carbon Cloth

Impregnation Adhesive Preparation: Mix impregnation adhesive components A and B according to the instructions and stir thoroughly (stir for ≥ 5 minutes to ensure full reaction). Avoid applying too much at once.

Impregnation Adhesive Application: Apply an even layer of impregnation adhesive to the leveled surface, maintaining a thickness of 0.3-0.5mm. (This should cover the entire carbon cloth attachment area, with an additional 50mm applied around the edges.)

Carbon Cloth Cutting and Attaching:

Cutting: Use a wallpaper cutter to cut the carbon cloth to the desired dimensions. (For unidirectional carbon cloth, pay attention to the direction of force.) Cutting must align with the fiber direction of the carbon cloth. Crosswise cutting, which may cause fiber breakage, is strictly prohibited. After cutting, the edges of the carbon cloth must be neat and free of loose threads.

Attachment: Gently place the cut carbon cloth on the base surface coated with the impregnating adhesive. Press gently to initially adhere the carbon cloth. Then, use a dedicated defoaming roller (rolling uniformly from the center of the carbon cloth toward the ends, along the fiber direction, with moderate pressure) to expel air bubbles between the carbon cloth and the adhesive layer and ensure that the impregnating adhesive completely penetrates the carbon cloth.

Multi-layer attachment: If the design uses multiple layers of carbon cloth (usually 1-3 layers), attach the second layer before the first layer of impregnating adhesive cures (approximately 1-2 hours at 25°C). First, apply impregnating adhesive to the first layer, then place the second layer on top. Repeat the defoaming roller process to ensure there are no bubbles between the layers.

UD carbon fiber cloth
UD carbon fiber cloth

Step 5: Topcoat Application and Curing

Topcoat Application: After the carbon cloth is attached, immediately apply an even layer of impregnating adhesive (as a topcoat) to the carbon cloth surface, with a thickness of ≥ 0.2mm. Ensure complete coverage to prevent aging due to exposure to air.

Curing:

Curing at room temperature (25°C): Curing time ≥ 7 days.

Curing Requirements: During curing, the carbon cloth must not be touched or disturbed. Avoid rain or dust. If the ambient temperature is low, the curing time may need to be extended.

Cure Verification: After curing, the carbon cloth surface is firm and non-sticky. A light tap with a hammer should produce a crisp sound.

III. Construction Differences for Different Structures (Targeted Adjustments)

Concrete Column (Circumferential Reinforcement)

Surface Preparation: The column surface should be polished into a circular shape (or rounded rectangle), with a corner radius of ≥ 25mm.

Carbon Cloth Attachment: The carbon cloth should be attached circumferentially around the column, with an overlap length of ≥ 100mm (or as required by the design). Rolling should extend from the center of the column toward both ends to avoid air bubbles. Concrete Beams (Shear Reinforcement, U-Shaped Bonding)

Both ends of the carbon cloth should be wrapped around the beam in a U-shape (extending to the top of the beam, with a length ≥ 100mm). If there is a floor slab on top of the beam, the carbon cloth should be embedded at the intersection of the floor slab and the beam to ensure a secure fit.

Note: During shear reinforcement, the carbon cloth must be applied perpendicular to the beam axis (i.e., horizontally).

Steel Structure Reinforcement

Surface Preparation: Remove rust and paint from the steel surface with a wire brush, then wipe with acetone to degrease. If there are any weld protrusions, smooth them with an angle grinder.

Adhesive: Use a carbon cloth adhesive specifically formulated for steel structures.

Precautions

Safety precautions: Applicators must wear gloves (to prevent adhesive contact with skin), masks (to prevent inhalation of carbon cloth dust), and goggles (to prevent flying debris during sanding).

Carbon cloth protection: Carbon cloth is a conductive material. During sanding, keep it away from electrical wires and electrical appliances to avoid electric shock.

Adhesive application: Adhesive must be prepared and used immediately. Do not return unused adhesive to the original packaging to avoid contamination.

Fireproofing: After curing, if the carbon cloth is used in an open flame environment (such as a kitchen or factory), apply a Class B1 or higher fire-retardant coating (thickness ≥ 3mm) to the surface to prevent oxidation and degradation due to high temperatures.

Unleash Performance with Thermal Paper Adhesive Labels
Founded in 2012 in Suzhou, China, Suzhou Revolve CF New Material Co Ltd is a leader in carbon fiber composite innovation. With a 23,000㎡ state-of-the-art facility and a 160+ expert team, we deliver lightweight, high-strength solutions for global industries, including aerospace, medical, and sports. Certified to ISO 9001 and ISO 13485, our products serve 75% export markets across Europe, North America, and Asia-Pacific, driving performance and sustainability.
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FAQs
  • What products does your company mainly provide?
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    We specialize in:
    Carbon Fiber Products: Including fabrics (UD, plain/twill, biaxial/triaxial), plates, tubes, and customized carbon fiber products like bicycle components and medical device parts.
    Release Paper and Release Films.
    Sticky Tapes and Thermal Paper Sticker.
  • What are your main advantages?
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    As a leading carbon fiber supplier in China, we provide:
    Direct manufacturing: from the origin factory, ensuring quality control and competitive prices.
    Cost-effective solutions: affordable prices, excellent performance.
    Quick response: fast quotation and professional customer support.
    Excellent quality: high production efficiency, strict quality standards.
    Comprehensive after-sales: excellent service to ensure customer satisfaction.
  • Are you a factory or a trading company?
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    We are a professional manufacturer of carbon fiber products and release materials. We have an advanced production base in Suzhou, China, ensuring high-quality materials and efficient services. Welcome to contact us.
    E-mail:
    inquiry-24h@revolve-cf.com
    WhatsApp:+86 18068406683
  • Do you provide transportation services, and what are the options?
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    Yes, we offer door-to-door logistics services, including:
    Sea Freight: Cost-effective for large orders.
    Air Freight: Faster delivery for urgent needs.
    International Express: Ideal for small, time-sensitive shipments.
    Alternatively, you can specify your preferred freight forwarder.
    Contact us to arrange shipping for your order.
  • Do you have a minimum order quantity (MOQ)?
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    Standard Products: No MOQ for our standard carbon fiber products, release paper, and films, Ensuring flexibility for all customers.
    OEM/ODM Products: MOQ ranges from 100 to 500 pieces, depending on product complexity and mold costs.
    Contact us to discuss your order requirements and customization options.
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At Suzhou Revolve CF New Material Co., Ltd., we have redefined various possibilities through cutting-edge carbon fiber solutions. To provide incomparable strength, lightweight, and sustainability for industries worldwide.

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