Why is it Called Carbon Fiber Building Reinforcement Cloth? This is the Best Answer

 

As a new type of reinforcement material, carbon fiber building reinforcement cloth is widely used in reinforcement works. Carbon fiber building reinforcement cloth is also called carbon fiber cloth. It is made of small tow raw yarn and woven by a carbon fiber weaving machine.

 

The application method of carbon fiber building reinforcement cloth is to pre-impregnate the carbon fiber cloth with extremely high tensile strength with epoxy resin into a composite reinforcement material, and use epoxy resin adhesive to stick it on the structure to be reinforced along the tensile direction or perpendicular to the crack direction, so that the carbon fiber bears tensile stress and coordinates with the deformation of concrete to bear force together to form a new composite body, improve the strength, stiffness, crack resistance and elongation of the structure, and achieve the purpose of improving the bearing capacity of the structure.

 

Carbon Fiber Building Reinforcement Fabric

 

Features Of Carbon Fiber Building Reinforcement Cloth:

High strength, low density, thin thickness, basically no increase in the self-weight and cross-sectional size of the reinforced components. Widely used in the reinforcement and repair of various structural types and shapes such as buildings, bridges, tunnels, and seismic reinforcement and structural reinforcement of nodes.

Convenient construction, no need for large machinery and equipment, no wet work, no need for fire, no need for on-site fixed facilities, small construction site occupation, high construction efficiency. High durability, because it will not rust, it is very suitable for use in high acid, alkali, salt and atmospheric corrosion environments.

Applicable to various structural types and reinforcement and repair of various structural parts, such as beams, slabs, columns, roof trusses, piers, bridges, cylinders, shells and other structures. Applicable to the reinforcement and seismic reinforcement of concrete structures, masonry structures, and wooden structures in port projects and water conservancy and hydropower projects, especially suitable for complex structural reinforcement such as curved surfaces and nodes. The strength requirement of the base concrete is not less than C15. The construction environment temperature is in the range of 5-35℃, and the relative humidity is not more than 70%.

 

Technical Indicators Of Carbon Fiber Building Reinforcement Fabric:

 

The earliest specification in China was the 2003 “Technical Specification for Carbon Fiber Sheet Reinforced Concrete Structure”, numbered CECS146:2003, which has been replaced by the latest national standard “Concrete Structure Reinforcement Design Code”, numbered GB50367-2013.

 

 

 

Carbon Fiber Cloth Product Classification:

 

According To Carbon Fiber Raw Yarn

1. PAN-based carbon fiber cloth (more than 90% of the carbon fiber cloth on the market is this type of carbon fiber cloth)
2. Viscose-based carbon fiber cloth
3. Asphalt-based carbon fiber cloth

According To Carbonization Of Carbon Fiber

1. Graphitized carbon fiber cloth can withstand high temperatures of 2000-3000 degrees;
2. Carbon fiber cloth can withstand high temperatures of about 1000 degrees;
3. Pre-oxidized carbon fiber cloth can withstand high temperatures of 200-300 degrees.

 

According To The Weaving Method

1. Woven carbon fiber cloth, mainly: plain cloth, twill cloth, satin cloth, unidirectional cloth, etc.;
2. Knitted carbon fiber cloth, mainly: warp knitted cloth, weft knitted cloth, circular machine cloth (tube), flat machine cloth (rib cloth), etc.;
3. Woven carbon fiber cloth, mainly: tube, packing, woven tape, two-dimensional cloth, three-dimensional cloth, three-dimensional woven cloth, etc.;
4. Carbon fiber prepreg cloth, mainly: dry prepreg cloth, wet prepreg cloth, unidirectional prepreg cloth, prepreg tape, no support cloth, with support cloth, etc.;
5. Carbon fiber non-woven fabric, non-woven fabric, that is, carbon fiber felt, carbon felt, including chopped felt, continuous felt, surface felt, needle felt, stitched felt, etc.

 

How To Identify Quality

 

First, the quality must be passed. Many manufacturers use basalt fiber and aramid fiber dyed black to impersonate carbon fiber cloth, which will cause unqualified engineering quality, so you must first learn to identify carbon fiber. Simply put, good carbon fiber tows are relatively black and shiny. When burned with fire, they will not curl, but will turn red like thin iron wire. They are smooth and soft to the touch, with uniform tows and good conductivity.

Second, the quality of carbon fiber pasting. The “Carbon Fiber Construction Acceptance Specifications” can be borrowed from the construction party by the engineering and the party A. Ensure the quality of pasting.

Third, carbon fiber is tensile, and its tensile strength is very large, but its anti-bending and anti-bending effects are poor, just like the above-mentioned bending.

Fourth, after carbon fiber pasting, it should be concealed with anti-corrosion mortar. Long-term drying will affect the service life of carbon fiber cloth.

 

Construction Method Of Carbon Fiber Building Reinforcement Cloth

 

There are many commonly used reinforcement methods, such as: increasing the cross-section method, external steel reinforcement method, steel bonding reinforcement method, carbon fiber reinforcement method, etc. Carbon fiber building reinforcement cloth reinforcement and repair structure technology is another new type of structural reinforcement technology after increasing the concrete cross-section and bonding steel.

 

Key points of carbon fiber cloth reinforcement construction: unloading → base treatment → leveling → primer → pasting → protection.

 

Preparation for construction of carbon fiber building reinforcement cloth:

 

Draft a construction plan and construction plan, and prepare for the use of carbon fiber sheets, supporting resins, machinery and tools before construction.

 

Concrete Surface Treatment

Remove the deteriorated concrete such as peeling, looseness, honeycomb, corrosion, etc. on the surface of the reinforced component, expose the concrete structure layer, and repair the surface with repair materials. Fill or seal the cracks according to the design requirements.

 

Prepare And Apply The Bottom Resin

Prepare the bottom resin according to the process regulations provided by the supplier, and evenly apply the bottom resin to the concrete surface. After the resin surface is dry to the touch, proceed to the next step of construction immediately. Prepare leveling materials and repair uneven areas. Use leveling materials to fill the concave parts of the concrete surface and use leveling materials to repair the corners into smooth arcs.

 

Paste Carbon Cloth/Aramid Cloth

① Cut the carbon cloth/aramid cloth according to the design requirements;

② Prepare impregnation resin and apply it evenly to the components to be pasted;

③ Roll along the fiber direction for multiple times to squeeze out bubbles so that the impregnation resin fully penetrates the carbon cloth/aramid cloth;

④ Evenly apply impregnation resin on the surface of the carbon cloth/aramid cloth.

 

Surface Protection

Handle according to the relevant specifications and ensure reliable bonding between the protective material and the carbon cloth/aramid cloth.

 

Precautions For Carbon Fiber Building Reinforcement Cloth

 

1. Carbon cloth is a conductive material. During construction, it should be kept away from electrical equipment and power supplies, or reliable protective measures should be taken.
2. Avoid bending of carbon cloth during construction.
3. Carbon fiber cloth supporting resin should be stored in a sealed manner, away from fire sources, and avoid direct sunlight.
4. The place where the resin is prepared and used should be well ventilated.
5. On-site construction personnel should take appropriate labor protection measures.