Strengthened by CFRP construction Tel: 13918759739 High-manager Strengthened by CFRP construction program CFR technology to national rules the earliest by the 2003 "carbon fiber sheet technical specification for strengthening concrete structures", the number of CECS146: 2003, now has been the latest National Standard Specification for "reinforced concrete structure design specifications" instead, its number is GB 50367-2006. First, the preamble of carbon fiber materials for the repair of concrete structures started in the 1980s reinforced the United States, Japan and other developed countries. Of this technology started late, but with the rapid development of China's economic construction, and transportation infrastructure, a significant portion of the existing building was designed because the low load standard historical issues caused some changes in the function of the building due to the use, difficult to meet The current specification demands the use of the urgent need for repair, reinforcement. There are many commonly used reinforcement methods, such as: increasing section method, enclosing Steel Reinforcement, bonded steel reinforcement method, carbon fiber reinforcement method. Carbon fiber reinforced repair structure technology is the second increase concrete sections, bonded steel after a new type of structure reinforcement technology, hailed: reinforcement new fighter. Second, the characteristics of carbon fiber to increase compared with the conventional concrete section or bonded steel concrete reinforcement, space-saving, simple construction, no fixed-site facilities, easy to guarantee the quality of construction, substantial increase in the structure size and weight, corrosion-resistant, durable Good performance characteristics. In addition, using this construction method can greatly improve the life of the building, reducing the cost of reinforcement. Thus, carbon fibers as a reinforcing material landmark, has become widely accepted and attention. (1) high tensile strength, is 7-10 times the same cross-section steel. (2) Light weight, density is only 1/4 of ordinary steel. (3) durability, corrosion and harsh environments can impedance, climate change destroy the chemical. (4) construction of convenient, time-saving section, easy to guarantee the quality of construction. (5) for a wide range of concrete structures, steel structures, wooden structures can be reinforced. Can greatly improve the member carrying capacity, seismic performance and durability. Applications ? concrete structures, beam bridges and buildings, column, panel reinforcement. · Tunnels, harbor facilities, chimneys, warehouses, factories reinforcement. · By salt damage protection and reinforced concrete structures of bridges and river. Third, the scope of application of carbon fiber reinforced carbon fiber reinforcement method can be used for concrete structures flexural, shear reinforcement, while widely used in various industrial and civil buildings, structures shock, cracking, corrosion of reinforcement. Fourth, the process principle of the high tensile strength carbon fiber composite reinforced with epoxy prepreg become material (unidirectional continuous fiber); tension direction or the direction perpendicular to the crack with epoxy adhesive paste to be reinforced along on the structure, the formation of a new complex, the reinforcing material with the original pasted together by reinforced concrete crack or shear force increases capacity of the structure, improve the strength, stiffness, crack resistance and elongation. Fifth, the process and the process operating points can be summarized as follows: the construction preparation work lines → → discharge facilities-based surface treatment → brush wiping paint primer → putty Gluing CFRP → → → brushing the carbon fiber surface maintenance special glue. 1. Concrete Surface Treatment 1 surface incomplete concrete structures, damaged part removed. 2 pairs after tick chisel, clean up and missing parts components exposed tendons, repair, restoration. 3 Crack Repair: Aperture cracks less than 0.2mm, and brushing the surface with epoxy resin seal; cracks greater than 0.2mm pouring with epoxy. 4 grinding: the component surface projection (transfer of parts of concrete structures, then hew templates, etc.) polished smooth surface of the component after the repair smooth as possible. Polished surface of the component 5 clean, and sufficiently dry. 2. Brushing primer defect site with a good primer (binder), even with brushing the concrete surface at the defect site. 3. Repair with epoxy putty repair surface defects on the surface of the component surface defects surface member is a very important step, points are as follows: 1 putty main agent, curing catalyst inlet, a curing agent according to a predetermined ratio accurately weighed, into the container, blender and mix well. 2 members dishing site filled with epoxy putty to repair to the surface roughness. When using epoxy putty in incomplete repair, to the temperature above -5 ℃, relative humidity less than 85% for construction. After Putty Scraping the surface roughening irregularities still exist, should then sanded smooth. 4. Brushing primer with a good primer (binder), even with a roller brush to require bonded concrete surface. 5. Before CFRP CFRP material, it should first confirm the paste surface is dry. Temperature above -10 ℃, relative humidity RH> 85%, if no effective measures are not construction. To prevent damage to the carbon fiber, carbon fiber materials transportation, storage, cutting and pasting process. The steel ruler and wallpaper knife cut a predetermined size carbon fiber material, each length is generally not more than 6m appropriate. In order to prevent material damage in the storage process, cutting the amount of material shall be subject to the same day the amount of crop. Carbon fiber longitudinal joints must overlap at least 20cm. The parts should be painted resin, carbon fiber lateral overlap is not required. Its construction elements process is as follows: a paste resin main agent, a curing agent and a curing agent urged the proportion should be required to accurately weighed, into the container, blender and mix well. Reconcile the amount of time should be spent within the available time prevail. 2 paste between carbon fiber and resin try not to have air. Available Rolla (special tools) along the fiber direction rolled several times in the carbon fiber material, immersing the resin infiltration of carbon fiber. 6. After curing CFRP material, nature conservation need 1-2 hours to reach the beginning of curing, should ensure free from outside interference and collisions during curing. 7. If the reinforcement member needs painting fire, the fire-resistant coating can be painted after the resin is cured. After the initial resin coating should be cured, and should comply with the relevant standards and regulations used in construction paints.