ケー・エフ・シー List of Products and Services

"Fitliner" is a chemically adhesive waterproof sheet developed for water-tight (non-drainage type) tunnels using the New Austrian Tunneling Method (NATM). By chemically bonding the surface of the waterproof sheet to the lining concrete, it prevents water leakage from damaged areas of the waterproof sheet from spreading. Additionally, made from flexible and highly stretchable EVA resin, it conforms well to uneven sprayed surfaces. With a thickness of 2.0 mm, it withstands high water pressure and excels in thermal welding on-site. 【Features】 ■ The special surface EVA resin chemically bonds with concrete ■ Prevents water leakage from spreading widely without meandering at the interface between the waterproof sheet and the lining concrete ■ Compatible with thermal welding to standard tunnel waterproof sheets ■ The signal layer is laminated, making it easy to detect damaged areas during construction *For more details, please refer to the PDF document or feel free to contact us.

• Waterproof sheet

The "Me fix type R" is a long steel pipe reinforcement method that aims to improve the adhesion strength, which has been a weakness of previous steel pipe cut-off reinforcements, and ensures reliable ground confinement force. The "type R (RASEN concept)" features a helical grooved steel pipe that possesses adhesion strength equivalent to that of conventional grooved GFRP pipes. When using smooth general steel pipes, the number required may increase due to insufficient adhesion strength, but this method can reduce the number of pipes used, providing economic advantages. 【Features】 ■ Improvement of adhesion strength and assurance of propulsion performance ■ Strengthening of threaded sections and thinning of steel pipes through diameter-reducing connections ■ Recycling of steel materials through separate collection ■ Use of small-diameter thin-walled steel pipes (φ76.3×4.0, 4.2mm) is possible ■ Improved economy and workability due to weight reduction *For more details, please refer to the PDF document or feel free to contact us.

• Work tools
• Special Construction Method

The "Signal Washer" is a plate developed to detect ground displacement caused by high earth pressure. It is set with a standard rock bolt, and when the axial force generated in the bolt exceeds a certain level, the coating of the special paint applied to the washer peels off, allowing for easy visual confirmation of changes. 【Features】 ■ 24-hour real-time status monitoring ■ Easy installation ■ Visualization of status changes ■ No electricity required ■ Patent registered ■ NETIS registered KT-180047-A *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The "IBO Lock Bolt" is a hollow lock bolt that has been rolled with R32 threads along its entire length, making it very easy to handle on site. It is effective not only as a self-drilling bolt but also as an injection bolt utilizing its hollow structure. It can be applied to a wide range of uses, including pattern bolts, fore-poling, tunnel repairs, LW urethane, and slope reinforcement. 【Features】 ■ R32 rope threads rolled along the entire length ■ Ensures slime discharge performance and stable adhesion performance ■ Allows simultaneous drilling and bolt insertion operations, reducing cycle time ■ Pursues cost-effectiveness through bit selection according to the target ground ■ Applicable to a wide range of uses *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

"IBO Dry Mortar" is a mortar developed primarily for filling IBO anchors (post-grouting rock bolts), characterized by its early strength and adhesion. It contains special additives, and when mixed with the specified amount of water, it can be smoothly injected through the hollow parts of the injection bolts. Additionally, its good fluidity makes it excellent for filling cracks and voids in the ground. 【Features】 ■ High-quality mortar can be mixed simply by adding the specified amount of water. ■ Combines fluidity and adhesion, resulting in properties suitable for construction. ■ Formulated for compatibility with MAI pumps. *For more details, please refer to the PDF materials or feel free to contact us.

• Mortar and plaster materials

"SN Dry Mortar" is a high-performance mortar suitable for pre-filling applications. Developed as a mortar for pre-filling, it is generally formulated to be suitable for the installation of rock bolts and similar applications. When mixed with the specified amount of water, it has a soft and sticky consistency, making it difficult to flow out even when filled into upward-facing boreholes, while also demonstrating sufficient initial strength. [Features] - High-quality mortar can be mixed simply by using the specified amount of water. - Combines fluidity and stickiness, resulting in properties suitable for construction. - Formulated for use with MAI pumps. - Standard mixing yield: approximately 10L/bag. *For more details, please refer to the PDF document or feel free to contact us.

• Mortar and plaster materials

"CT Mortar" is a fast-setting, expanding type of premixed mortar developed for the post-filling injection of rock bolts. Its main purpose is to securely anchor rock bolts into the surrounding rock mass, while also filling voids and cracks caused by looseness around the borehole, thereby enhancing the reinforcement effect by quickly developing strength. 【Features】 ■ Can compensate for poorly filled areas (voids) through volume expansion ■ In soft rock masses with low adhesion, improves adhesion by applying pressure during injection and additionally compressing the borehole walls through volume expansion ■ The expansion of the mortar filled in the borehole and cracks compresses the surrounding rock mass, increasing its shear strength ■ Good workability and easy handling *For more details, please refer to the PDF document or feel free to contact us.

• Mortar and plaster materials

The "CT Bolt" is a hybrid type rock bolt that is temporarily installed and later permanently secured with grout. It allows for quick and easy installation, and various viscosities of grout can be easily injected and filled. Additionally, the polyethylene sleeve protects the bolt from corrosion. Manual installation is possible, and automated installation can also be achieved using a specially developed rock bolt setter. 【Features】 ■ Hybrid type rock bolt ■ Quick and easy installation ■ Easy injection and filling of various viscosities of grout ■ Special hemispherical dome head ■ Unique anti-corrosion structure *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The "Me Method" is a small-diameter long steel pipe face reinforcement technique applied in weak ground conditions such as tunnel entrances and unconsolidated ground during mountain tunnel excavation. By enlarging the connection part, it enhances the strength of the threaded section, allowing the use of small-diameter thin-walled steel pipes (φ76.3×4.2mm), which improves economic efficiency and workability due to weight reduction. Additionally, "Me-fix" aims to improve the adhesion strength, which has been a weakness of previous steel pipe face reinforcements, ensuring reliable ground confinement. 【Features】 ■ Recycling of steel materials through separate collection ■ Thinning of steel pipes through enlarged connection parts (socket method) ■ Improved adhesion strength of long steel pipe face reinforcements *For more details, please refer to the PDF document or feel free to contact us.

• Work tools
• Special Construction Method

The "AGF-Me (Metal eco) method" is a patented method (Patent No. 3882118) for the non-widening long steel pipe advance construction. It features vertical slits in the end-reinforcing steel pipes of the cutting section during tunnel excavation with non-widening support, allowing for the separate recovery of the steel pipes and injected materials during excavation. This method eliminates unnecessary mixed industrial waste and enables resource utilization as sorted industrial waste. [Features] - Patent No. 3882118 obtained - Structure allows for the separate recovery of steel pipes and injected materials during excavation - Eliminates unnecessary mixed industrial waste and enables resource utilization as sorted industrial waste *For more details, please refer to the PDF document or feel free to contact us.

• Work tools
• Special Construction Method

We handle the tunnel excavation material "GFRP Rock Bolt." We offer the solid type "CG22S," which allows for nut attachment and connection via joint couplers, and the "CGR32," which utilizes its hollow section to inject anchoring materials or ground reinforcement materials. These can be used for applications such as middle wall construction methods, face reinforcement bolts, and injection pipes for planned excavation areas. 【Features (CG22S)】 ■ Solid type fully threaded GFRP rock bolt ■ Allows for nut attachment and connection via joint couplers ■ Suitable for applications such as middle wall construction methods and pattern bolts for advanced guide piles *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

The "Super Spiral Bolt SP24" is a high-strength locking bolt that inherits the excellent features of the "SN Twist Bolt." It features a newly designed special rib and screw section that are simultaneously formed during the round steel rolling process, resulting in no cross-sectional defects in the screw section and consistent strength throughout its length. 【Excellent Characteristics】 - It uses high-strength material SD685, achieving a high yield load of over 297 kN while being even lighter (3.4 kg/m) than the SN Twist Bolt. - By maintaining the same material diameter and reproducing the surface shape of the SN Twist Bolt, the insertion resistance is equivalent to that of the SN Twist Bolt. - It inherits the excellent anchoring characteristics of the SN Twist Bolt, with high adhesion toughness against ground deformation during the early age of the anchoring material, making it less prone to adhesion failure. - The adoption of the special-shaped nut "S Nut" reduces the protrusion of the nut and bolt, eliminating the need for protective materials (caps/mats) during waterproof sheet installation. *For more details, please refer to the PDF document or feel free to contact us.*

• Work tools

This product is a rock bolt that can be applied under high ground pressure due to its high strength (290 kN capacity). The increase in strength allows for a reduction in the number of bolts, improving construction speed. After installation, the anchoring force is secured instantly, contributing to rapid construction. Additionally, it can be tightened using nuts and square washers. 【Features】 ■ Applicable under high ground pressure due to high strength (290 kN capacity) ■ Improvement in construction speed by reducing the number of bolts due to increased strength ■ Instant securing of anchoring force after installation, contributing to rapid construction ■ Tightening possible with nuts and square washers *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

"Q-Tight" is a paper tube-type adhesive anchor developed as a cement mortar-based anchoring material for post-installed anchors used in construction and civil engineering. The installation using this product employs a capsule containing high-performance non-shrink mortar, which is used in an anchor system to secure anchor bolts within the base material holes, achieving strength comparable to conventional resin-based anchors along with five key features. 【Five Key Features】 ■ Workability ■ Fire Resistance ■ Safety ■ Environmental Friendliness ■ Cost-effectiveness *For more details, please refer to the PDF document or feel free to contact us.

• Safety and consumables

The "Double X Anchor" is a threaded plug for ALC that has an independent screw section unrelated to the adhesion function, making it easy to screw in bolts. By lightly tapping it in with a dedicated insertion rod, the eight claws reliably protrude, providing a clear indication of adhesion, and the plug adheres completely. The material used is nylon 66 reinforced with 15% glass fiber. It has excellent mechanical properties, allowing for safe use. 【Features】 ■ The screw section is independent of the adhesion function ■ Easy to screw in bolts ■ Clear confirmation of adhesion, and the plug adheres completely ■ Made of nylon 66 reinforced with 15% glass fiber ■ Excellent mechanical properties *For more details, please refer to the PDF document or feel free to contact us.

• Safety and consumables
• Work tools

"SR Tight" is a capsule anchor based on inorganic adhesive, primarily for general construction work. Being capsule-shaped, it requires no weighing, mixing, or injection work, making installation easy. Simply immersing it in water allows for proper control of the water ratio, resulting in stable performance. Additionally, there is no shrinkage after curing, providing stable strength. It can be installed using either a driven type or a rotary-impact type. 【Features】 - Easy installation with no weighing, mixing, or injection work due to its capsule shape. - Proper control of the water ratio is achieved just by immersion in water, resulting in stable performance. - No shrinkage after curing, providing stable strength. - Can be installed using either a driven type or a rotary-impact type. - Made with cement mortar, it is non-combustible and has excellent fire resistance. *For more details, please refer to the PDF document or feel free to contact us.

• Safety and consumables

The steel pipe expansion type friction lock bolt has been adopted as a solution for tunnel construction projects under difficult geological conditions. Its weakness is the "uncertainty of lifespan" of the thin-walled steel pipe that is fixed in direct contact with the geological formation. This product addresses that weakness. The introduction of the steel pipe expansion type friction lock bolt, which is expected to have a semi-permanent function. 【Features】 ■ Higher hardness and less prone to scratches compared to other galvanized products ■ No peeling of the coating layer due to expansion during construction ■ Exhibits excellent corrosion resistance under geological conditions with a pH of 4 to 12, maintaining reinforcement effects over the long term ■ Applies a new material with excellent elongation properties, excelling in deformation characteristics *For more details, please refer to the PDF document or feel free to contact us.

• Work tools
• Tunnel Materials

This product is suitable for conditions that require higher elasticity (when the rock bolt needs to function within the elastic range and reduce deformation in the excavation area more effectively). With the improvement in yield strength and fracture strength, the excellent features of "Suerex" can now be utilized under greater load conditions. The combination of material technology and Suerex bolt functionality enables reliable installation, support functions that are exhibited throughout the entire length of the bolt immediately after installation, and the ability to respond to harsh excavation conditions. 【Features】 ■ Quality can be verified with each installation ■ Safe and simple installation work ■ Exhibits support capacity as per specifications immediately after installation ■ Does not require harmful chemicals ■ Corrosion protection suitable for long-term support ■ Not affected by vibrations from blasting ■ Reduction in working time is possible *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

This product is a lock bolt made from high-strength deformed steel SD345 as specified in JIS G3112. It is processed with rolled metric threads based on JIS B0205. Additionally, the tip shape is conical. 【Features】 - Made from high-strength deformed steel SD345 as specified in JIS G3112 - Rolled metric threads based on JIS B0205 - Conical tip shape *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The "SN Twist Bolt" is a twisted rebar lock bolt that has been cold twisted from specially manufactured high-tensile deformed steel to further enhance its strength. When this product is inserted into a borehole filled with mortar, the spiral ribs and cross ribs rotate the mortar, improving the ease of insertion. As a result, it prevents voids from forming behind the ribs and joints, ensuring good adhesion along the entire length of the bolt. 【Features】 ■ Forms a surface shape that is easy to insert into boreholes filled with mortar ■ Effectively prevents the formation of voids between the mortar and the bolt ■ Adhesion performance with mortar is superior to that of deformed steel ■ Rolled threads based on JIS-B-0205 standard metric coarse threads *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

The "Chemical Anchor RQ Type" is a bonding type post-installed anchor designed for low-temperature rapid curing. It demonstrates excellent curing performance even at low temperatures and cures within a few minutes at room temperature, making it suitable for continuous work such as anchor installation followed by hardware attachment. Additionally, it uses a modified vinyl ester resin that does not contain "styrene" as a raw material, eliminating the unpleasant styrene odor during installation. 【Features】 ■ Measures against sick house syndrome (no styrene used in raw materials) ■ Excellent curing performance ■ Safe glass tube type *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

The "Q-Tight type-M" is an inorganic anchor that can be used for underwater construction. It allows for long-length construction underwater and can accommodate a bond length of 15d or more. 【Features】 ■ A post-installed anchor made from a material that does not require on-site mixing or kneading, possessing properties similar to underwater non-separating concrete. ■ Compatible with rust-resistant rebar (resin-coated) for underwater use. *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

This product is a hex bolt with two functions: preventing loosening and preventing falling. It uses a locking K nut. In the event of loosening, the nut is stopped by the stepped section applied to the anchor screw part, providing a "fall prevention function." 【Features】 ■ Uses a locking K nut for the included nut to prevent loosening after tightening. ■ Even if the nut loosens, it will be stopped by the stepped section of the bolt body. ■ Adjustable shank length and can be processed into a U-bolt. ■ Patent No. 3354910. *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

This product is a nut with a locking feature. The locking function is activated by a friction ring (spring) attached to the top of the nut. It complies with tests based on NAS3350 and 3354. 【Features】 ■ Prevents loosening by strongly pressing the threads with the friction ring ■ No special tools required as it is handled like a standard hex nut ■ Complies with tests based on NAS3350 and 3354 ■ Stainless steel products have anti-seizing measures through fluorine coating *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

This product is a clip-on lock nut that can be installed from one side. The clip and K-nut are joined by six points of electric spot welding, allowing work in hard-to-reach areas and preventing the nut from falling off during operation. Additionally, stainless steel products are treated with a fluorine coating to prevent seizing. 【Features】 ■ The included K-nut has a locking function (compliant with NAS33530 and 3354 tests) ■ Prevents nut drop during operation ■ Seizing prevention measures with fluorine coating treatment (for stainless steel products) *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

This product is a nut equipped with a double lock feature. By adding a K-lock (nylon coating) to the friction ring and the threaded part, we have achieved a high-performance anti-loosening mechanism with the double lock feature. The anti-loosening test is compliant with the NAS3350 and 3354 standards. 【Features】 ■ Anti-loosening nylon coating ■ Safety measures ■ Vibration resistance *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

This product is a post-installed anchor with a locking function to prevent loosening. The K-lock feature continues to provide the anti-loosening function even after repeated insertion of bolts. The anti-loosening test is conducted in accordance with NAS3350 and 3354, and the product has passed the test. 【Features】 ■ Threaded anchor with anti-loosening function ■ Safety measures ■ Vibration measures *For more details, please refer to the PDF document or feel free to contact us.

• Railway Construction
• Road construction
• others

The "One-Site Bolt" is a bolt with a locking nut that can be installed from one side. The nut uses a locking K nut, allowing installation without damaging the base material. We also offer the "Safety One-Site Bolt," which features double fall prevention measures. 【Features】 ■ Ease of installation ■ Safety measures ■ One-sided installation *For more details, please refer to the PDF document or feel free to contact us.

• Bridge Materials
• others

The SR method is a construction technique that involves injecting filling material into the voids behind the lining of existing tunnels and the backs of concrete structures, thereby integrating the ground and the structure. It excels in limited injectability that meets the required quality for the filling material in the back voids. 【Construction Procedure】 Air mortar is prepared by mixing a mortar made of a specified amount of cement, filling material, and water with foam generated by a foaming machine. This air mortar and the plasticizing agent "SRP-L" are each pumped and injected into the void while being mixed together at the injection point.

• Renovation and repair methods

The RBS form construction method is a cavity injection technique using polyurethane-based injection materials developed for the purpose of filling tunnel voids and reinforcing existing tunnels by filling the cavities behind the lining concrete. The high filling capacity and permeability due to the unique foaming of polyurethane resin allow for the filling of voids. Additionally, it penetrates cracks in the lining concrete, providing a waterproofing effect as well.

• Renovation and repair methods

The Gain CF Sheet Method is a technique that involves applying carbon fiber sheets treated with high adhesive penetration to concrete structures for the repair and reinforcement of tunnels. It has passed tests for "flammability, self-extinguishing properties, and the safety of emitted gases," making it suitable for use within tunnels. Additionally, the sheets are treated for high penetration and, when combined with a specialized adhesive, exhibit excellent adhesive performance. This helps to prevent the sheets from peeling during construction, ensuring safe installation. There are two types of sheets with different weaves: the "CR" type, primarily used for fall prevention, which incorporates carbon fibers woven in both vertical and horizontal directions, and the "UD" type, designed for reinforcement, which aligns carbon fibers in one direction. With the addition of the 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.

• Renovation and repair methods

The bolt itself has a function to prevent loosening. Even when tightened to a value approximately 20% lower than the traditionally recommended torque, it is designed to prevent loosening. The anti-loosening function has passed impact and vibration tests in accordance with NAS3350 and 3354 standards.

• Bridge Materials

We handle various types of post-installed anchors to meet diverse needs. Additionally, we excel in unique technological development through design and construction using our own products. This catalog features our anchor products. Please feel free to consult us if you have any requests. *For more details, please download the PDF or contact our sales office.

• Work tools

This is a new concept tunnel rock bolt that expands due to high water pressure and has a mechanism for securing itself to the surrounding rock. 【Features】 ★ Reliable construction without filling materials ★ It secures itself to the surrounding rock with the expansion pressure of the steel pipe, without using filling materials like mortar. Even in areas with water inflow, it secures itself reliably without the influence of cement component leakage. ★ Speedy construction ★ Since no fixing materials like mortar are needed and it secures itself simultaneously with construction, it contributes to shortening the construction cycle and achieving early strength development. ★ High corrosion-resistant rock bolt ★ The entire length of the bolt is treated with high corrosion-resistant plating, boasting high durability. This contributes to the long lifespan of tunnel structures. *For more details, please download the PDF or contact us.

• Tunnel Materials

This product is a metal anchor with an undercut design. Mechanical anchoring force is applied to the undercut part, reducing pull-out and slip. It demonstrates sufficient anchoring performance even in high-strength concrete. 【Features】 ■ Suitable for upward installation ■ High reliability as a hanging anchor ■ Material capable of complete anchoring in high-strength concrete with a strength of 60 N/mm² or more *For more details, please refer to the PDF document or feel free to contact us.

• Road facilities

- The anchor features a hole for passing wires, etc., through the tapered bolt section, which means fewer components are needed as it does not require the use of eye bolts, eye nuts, or hanging hardware. This is expected to reduce costs for safety measures, improve workability, and shorten construction periods. - Its simple structure eliminates the need to check for screw loosening during inspections after construction, which is expected to enhance the reliability and efficiency of inspections. - It is a post-installed metal anchor that uses a sleeve-driven method. With a male thread design, when tensile force is applied, the sleeve expands in response, providing a more reliable crimping effect. It has been designated as a recommended material by the Japan Seismic Ceiling Construction Cooperative.

• Road facilities

When the cap set on the nut reaches the appropriate torque, the inner claws break, and the cap spins freely to indicate that the installation is complete. A capped state indicates that installation is not yet complete. The work is finished when the cap is removed and the nut is exposed. This prevents not only forgetting to tighten or insufficient tightening but also seizing due to over-tightening. It is possible to tighten with the appropriate torque using only an impact wrench, without the need for a torque wrench or special tightening machinery.

• Road facilities
• Road signs and road accessories