Carbon fiber cloth reinforcement for ancient buildings in Changde

Carbon fiber cloth reinforcement for ancient buildings in ChangdeIntroduction:

The application of carbon fiber cloth reinforcement construction technology in building structure reinforcement. Carbon fiber materials have mechanical properties, and their tensile strength is generally more than ten times that of building steel; After the carbon fiber material is woven into carbon fiber cloth, it is difficult for the various carbon fiber filaments to work together completely. When subjected to lower loads, a part of the carbon fiber filaments with higher stress levels first reach their tensile strength and retreat to their working state, and so on. Each carbon fiber filament gradually fractures until the whole is destroyed. Under normal circumstances, the higher the public water level and the lower the temperature, the higher the level of soil uplift in the foundation, and a certain part of the building will be lifted up. Due to the fact that many houses nowadays are made of cast-in-place concrete slabs, it is impossible to prevent cracks of different levels from appearing (with unified prices and reinforcement qualifications available for construction in various places). The prepared primer should be applied within 50 minutes. To avoid damage to carbon fiber during transportation, storage, cutting, and pasting of carbon fiber materials. The adhesive should be applied within 45 minutes after preparation.

Abstract: Carbon fiber has been widely used for reinforcement in foreign countries, and carbon fiber reinforcement is also a common method and approach in civil engineering and building reinforcement in China. Clean the surface of carbon fiber materials to remove floating dust.

Before stopping carbon fiber reinforcement, the reinforcement design must be stopped. In the reinforcement design of structures, ordinary standards prevent the separation of two types of data with significant differences in properties. Carbon fiber has a high strength (about ten times that of steel bars), but its elastic coefficient is not much different from that of steel bars. Based on the experience of using reinforced concrete, carbon fiber cannot be used for reinforcement of reinforced concrete without matching titles. Therefore, it can be used to compensate for the lack of tensile strength of steel bars in reinforced concrete. As the reinforcement design is based on the reinforcement of existing structures, it is necessary to first understand the concrete strength, steel bar properties, configuration position and number of the original structure. If the original structure is damaged, the cause must be identified and some damage must be repaired before stopping the reinforcement. Usually, the strength of concrete can be measured by drilling experiments. If the strength is greater than the design value, Stop the reinforcement design based on the design value, and if it is lower than the design value, stop the reinforcement design based on the measured strength. The longitudinal joints of carbon fiber must overlap at least 500px. (3) Widely applicable. ”So, which type of crack needs attention? How serious is the harm of cracks?

Our company has reinforcement qualifications and specializes in undertaking: planting reinforcement, bonding steel reinforcement, building crack reinforcement, building carbon fiber cloth reinforcement, school seismic reinforcement, bridge maintenance reinforcement, tunnel reinforcement, factory reinforcement, floor crack reinforcement, building renovation reinforcement, structural beam column carbon fiber reinforcement, column wrapped angle steel grouting reinforcement, etc; Professional production: planting adhesive, steel adhesive, pouring adhesive, joint filling adhesive, carbon fiber adhesive, carbon fiber cloth, sealing adhesive, repair adhesive; We warmly welcome everyone to come and discuss cooperation!

A private house inspector told reporters that among the hundreds of houses he has inspected, there are zero houses without crack titles. Carbon fiber cloth is lightweight, does not require large equipment for on-site bonding, and is easy to construct. It can also be used in other concrete reinforcement projects, such as bridges.

Conclusion:
The premise of ordinary engineering construction is not good, and it is necessary to ensure that the fiber arrangement after carbon fiber bonding is neat and the direction is different. The application of carbon fiber cloth reinforcement technology in building structure reinforcement has mechanical properties, and its tensile strength is generally more than ten times that of building steel; After the carbon fiber material is woven into carbon fiber cloth, it is difficult for the various carbon fiber filaments to work together completely. When subjected to lower loads, a part of the carbon fiber filaments with higher stress levels first reach their tensile strength and retreat to their working state, and so on. Each carbon fiber filament gradually fractures until the whole is destroyed. Under normal circumstances, the higher the public water level and the lower the temperature, the higher the level of soil uplift in the foundation, and a certain part of the building will be lifted up. (Unified price, construction can be carried out in all regions with reinforcement qualifications)
Due to the fact that many houses nowadays are made of cast-in-place concrete slabs, the occurrence of cracks at different levels is simply unavoidable. The prepared primer should be applied within 50 minutes. To avoid damage to carbon fiber during transportation, storage, cutting, and pasting of carbon fiber materials. The adhesive should be applied within 45 minutes after preparation.

Carbon fiber cloth reinforcement for ancient buildings in ChangdeThe arrangement direction is indeed guaranteed:

The construction site environment is usually poor, and it is difficult to grasp the premise of data storage. Alternatively, if the container cannot control the temperature during transportation, in a high-temperature environment, if the carbon fiber cloth contains resin, it will mature during storage or transportation, causing the bonding resin to be unable to penetrate the carbon fiber cloth, resulting in incomplete separation and inability to exert reinforcement effect. Therefore, carbon fiber cloth without resin is used. In the process of leveling the foundation of a house, it usually goes through the process of high excavation and low filling, so different levels of foundation settlement will occur after the house is built.
Appearance treatment: The moisture content of the concrete surface layer at the bonding site should be less than 4%, and the concrete surface should be exposed and the structure should be clean.
Background material: Key words: Carbon fiber cloth reinforcement design.

Abstract: Carbon fiber has been widely used for reinforcement in foreign countries, and carbon fiber reinforcement is also a common method and approach in civil engineering and building reinforcement in China. Clean the surface of carbon fiber materials to remove floating dust.

A private house inspector told reporters that among the hundreds of houses he has inspected, there are zero houses without crack titles. Carbon fiber cloth is lightweight, does not require large equipment for on-site bonding, and is easy to construct. It can also be used in other concrete reinforcement projects, such as bridges.
Invert the "eight" character, degree, and vertical seam, and first break them diagonally on the window. After preparation and mixing, the rubber material should be free of sedimentation, color difference, and bubbles, and dust and impurities should be avoided from mixing into the rubber material. Firstly, the surface of the concrete needs to be leveled and then coated with a bottom layer of resin. In uneven areas, epoxy resin leveling materials are used to fill in the gaps. Then, bonding resin is applied and carbon fiber patches are attached. The required number of layers are pasted in the required reinforcement direction according to the design requirements, and the outer layer is maintained with maintenance materials. The compactness can be struck on the surface with a small hammer, and uneven settlement of the foundation is also a common cause of cracks.

Repair and leveling: After the above process, if there are any unevenness on the surface of the concrete, apply repair glue to level it.
Concrete surface humidity:
Title to pay attention to when reinforcing with carbon fiber.

The main focus of carbon fiber reinforcement construction is to tightly separate carbon fibers from concrete and ensure that the orientation of carbon fibers deviates from the design requirements.
The workability of epoxy resin:

Ordinary epoxy resin cannot be used in humid environments, usually with a relative humidity of no more than 85%. Once the foundation settlement is uneven and there is relative displacement between the areas with large settlement and those with small settlement, diagonal cracks will randomly form, and the direction of the cracks is usually towards the concave area. Our company specializes in the construction and technical consulting of reinforcement and strengthening projects such as carbon fiber reinforcement, bonded steel reinforcement, crack repair, crack grouting reinforcement, planting reinforcement, bridge jacking reinforcement, building reinforcement, structural transformation, fire room reinforcement, and progressive load increase reinforcement for civil engineering and construction.
Appearance treatment: Clean the concrete surface of the pasted area of floating slurry, oil stains, and impurities. If there are honeycombs or cracks on the surface, repair should be stopped until the structural body is exposed and blown clean.

Temperature difference is a common cause of wall cracks.
Rubber material preparation: The rubber material should be thoroughly mixed in proportion before preparation. Firstly, the design institute will confirm the reinforcement location based on the renovation request of the community, and send the drawings to the construction unit. The construction personnel of the construction unit will confirm the reinforcement location and the thickness of the carbon fiber cloth used based on the drawing request; After confirming the position, the professional construction team will stop disposing of the concrete surface, remove the deteriorated layer of the concrete surface and grind it flat. Any gaps should be filled with resin injection, and the external corners of the beam should be ground into a circular arc shape; After the surface treatment of the concrete is completed, apply the bottom glue. The thickness of the bottom glue should be uniform, and ensure that the bottom glue penetrates the concrete. If necessary, dust prevention measures should be taken; When the bottom glue is dry and not sticky to the hands, fill in the concave holes on the surface of the concrete to avoid gaps when sticking the cloth; After ensuring that the surface of the concrete is smooth, apply resin with a uniform thickness and no sagging. Then, wrap the carbon fiber cloth around the beam according to the design requirements, and use your hands to smooth it from bottom to top, so that the resin is evenly immersed in the cloth and the bubbles in the cloth are squeezed out. The outer surface of the cloth should have wrinkles and tilts; Then evenly apply resin on the surface of the cloth, and repeat the previous step to stick the cloth.
Appearance protection: Apply a layer of adhesive evenly on the carbon fiber * that has been pasted.
Appearance protection: A layer of adhesive should be applied on the carbon fiber layer to stop the protection. The application should be uniform and sufficient, and there should be no omissions. But the environmental humidity at the construction site is difficult to control and measure. If it cannot be fully grasped, it is necessary to use resins that can be used under high humidity conditions.