Characteristics

• You can inject unlimited amount of grouting material without bubbles (remove air) because you can apply pressure to the plural numbers of cracks sequentially or simultaneously.
• 2.Surface tension and capillary action can be fully utilized because of low speed injection and infiltration into the minute cracks or air void is possible thanks to the low pressure injection which employs the tensile strength of rubber bands.
  As epoxy concrete is more than 4 times as strong as the base structure, it reinforces the weak parts around the cracks by eliminating or scattering the loads centered on, or moving to, the weakened parts if there is any threat to the safety of the structure. Namely, the spread or growth of early stage cracks can be prevented by reducing the local loads to the maximum by scattering the centered loads over a large area.
  The best way for the water leakage (dampness) caused by cracks is to rework on the waterproofing but it involves an increased construction cost. And rework on the waterproofing with the cracks left unrepaired is most likely to lead to recurrence of defects. Because the waterproofing work on the parts that are not durable is meaningless, you have to choose a repairing method that can satisfy both durability and waterproofness.
• Epoxy resin is the resin which is specially designed to have elasticity and receptivity against vibration or cracks and can be used for the syringe injection with a selection of viscosity and pot life.

Application Area

• Repair and reinforcement of cracks in subway and tunnel.
• Repair and reinforcement of cracks of Pc plate, concrete molding product.
• Grouting reinforcement of aged or weakened parts of concrete.
• Repair and reinforcement of slab and upper plate etc.
• Grouting of loose gap of concrete plastering mortar and tile.
• Repair and reinforcement of bridge and bridge pier etc.

Materials of use based on the width of cracks

• Epoxy Grouting Material : A grouting material of high flexibility and adhesive strength for the racks of concrete structure, which recovers the staying power of the structure through perfect bonding and integration.
• Epoxy Sealing Material : A sealing material having an excellent adhesive strength with concrete metals, which seals the cracks to prevent the leakage of grouting material and helps set washer of syringe injector on the cracks.

Specification of Syringe Injector

• Selection criteria based on the width and depth of cracks
  Grouting material of low viscosity and long pot life should be used for the narrow but deep cracks while the grouting material of high viscosity and short pot life should be used for the side but shallow cracks.
• Selection criteria based on the injection device
  You can use the grouting material of low viscosity for injection in low pressure with syringe injector, injection pot, reinjector etc and the grouting material of relatively high viscosity for the work with packer which can withstand high injection pressure.
• For the repair of cracks of new structure with vibration or under stabilization process, you should use the grouting materials with elasticity and elongation. Some product of high strength may cause new cracks.
• The cracks of concrete structures usually contain moisture inside due to the difference in temperature between the inside and the outside and due to the moisture in the air. Therefore, you should use, even for the dried surface, such a type of resin that has high adhesive strength for wet area and should use wet type resin especially for the cracks of underground structures.

Notes on job site work

• Never fail to abide by the designated mixture ratio, for it is the dual component type of the main material and the hardener. Acceleration or deceleration of the hardening speed through a random increase or decrease of the hardener will cause greatly reduce the post hardening properties.
• Mix the volume only that you can use up within the pot life. Pay attention to the fact that the reaction speed of mixed resin becomes fast when the temperature is high or its volume is large, and slow when the temperature is low or its volume is small.
• If the temperature is below 5℃ at the site, raise the temperature by indirect heating before use.
• Please inject sufficient quantity of epoxy resin if there are too many air voids, or the base structure is not strong, or injection is made into cement block or the cracks are penetrated.(Some of epoxy resin should still remain in the injector even after the injection is completed)If the epoxy is absorbed into the base structure concrete or runs down, the inside of the cracks may still remain empty.
• Pay attention to the ventilation of the site and avoid long work. Be wary of fire while handling. Epoxy does not contain flammable organic solvents, but it is still flammable substance.
• Clean the tools, containers etc promptly when the work is finished.
• Please make sure that it does not come into contact with human skin directly. (use protective glove etc) If it happens to come into contact with your skin, wash it well with a large amount of water and soap. In case it gets into your eyes, wash it with water immediately and see a doctor.