High-strength carbon fiber "Gaina CF Sheet" demonstrates significant reinforcement and repair effects on concrete structures without applying any load.
The Gain CF Sheet Method is a technique that involves applying carbon fiber sheets treated with a high-impregnation adhesive to concrete structures for the repair and reinforcement of tunnels. It has passed tests for "flammability, self-extinguishing properties, and safety of generated gases," making it suitable for use inside tunnels. Additionally, the sheets are treated for high impregnation, which, when combined with a specialized adhesive, provides excellent adhesion performance. This helps to prevent sheet peeling during construction, ensuring safe installation. There are two types of sheets with different weaving patterns: the "CR" type, primarily used for falling debris prevention, which weaves carbon fibers in both vertical and horizontal directions, and the "UD" type, used for reinforcement, which aligns carbon fibers in one direction. With the addition of the new UD300, which has a weight of 300g/m², alongside the existing UD200 and CR200 (both with a weight of 200g/m²), the application range of the Gain CF Sheet Method has expanded.
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basic information
The Gain CF sheet method has the following features: ■ Workability - The materials and equipment used are lightweight, allowing for manual work without the need for heavy machinery. - The Gain CF sheet can be easily cut and processed, making it simple to install according to the shape of the site. - The equipment used is compact, enabling work in confined spaces. ■ Durability - The materials used are non-corrosive, ensuring stability in tunnel environments. ■ Reinforcement Effect - The Gain CF sheet has a specific gravity that is one-fourth that of iron, yet its tensile strength is 6 to 10 times greater, effectively reinforcing concrete without adding load to concrete structures and preventing the spalling of concrete pieces. ■ Cost - By joining Gain CF sheets, continuity is ensured, allowing for application to various shapes and areas, which standardizes construction and enhances economic efficiency. ■ Quality - The Gain CF sheet CR type uses carbon fibers treated for opening, resulting in high resin impregnation and excellent CFRP performance, leading to stable quality.
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Applications/Examples of results
■Construction Achievements (excerpted) - Chuo Expressway, improvement work between Tatsuno Tunnel and Ibuki IC, UD200, 3,975 m² - National Route 303 auxiliary road repair work (Iwakura Tunnel), UD200, 2,768 m² - Fiscal Year 2016, Karato and Arino Tunnel repair work, UD200, 1,724 m²
Detailed information
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CR type (2-direction high-strength carbon fiber) Repair carbon fiber sheet
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UD type (unidirectional high-strength carbon fiber) multi-layer reinforcement carbon fiber sheet
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Company information
As a pioneer in post-installed anchors in Japan, KFC was established in 1965. We respond to customer needs with a consistent system from product development to sales and construction. Our business activities are centered around three main areas: construction fastening materials such as post-installed anchors, materials for tunnel excavation like rock bolts and auxiliary methods, and various construction works related to seismic reinforcement, safety measures, equipment, and refreshment.