Epoxy resin used for repairing and reinforcing of concrete structure has superior adhesion and strength, and therefore, is necessary for injection into cracks. However, due to high strength, it can be easily broken, and hence, is not suitable for large concrete structures with relatively greater vibration (tunnel, road, revetment, and dam) or the structure with repeated vibration and weight (subway, elevated road or bridge). DH-002 is designed to solve this problem. Because the material maintains appropriate elasticity of 30%~50% after hardening, it absorbs various stresses applied to the structure, prevents cracks, and provides long-term stability.

It is used for the repairing of cracks of over 0.2mm when the measured width of a crack is larger than the allowable width in case the target member is structural member, or when the structural stability, durability, waterproof should be considered regardless of the identity of the target member. Applications are as follows.

Repair and reinforcement of cracks in the subway and tunnel

Repair and maintenance of structure with repeated vibration

Grouting of cracks in joints

Repair and reinforcement of large structure with repeated shrinkage and expansion

Repair of cracks of concrete structure with insufficient joints

Pot Life   the period of time during which you can work without a change in viscosity after resin and hardener are mixed.

Tack Free  the state of hardening in which you can lightly touch the mixed resin with your hand, but the hardened material does not stick.

Hardening Time  the time it takes for the mixed resin to be hardened enough to realize about 80% of final mechanical strength.

①Reinjector is a mid-low pressure injecting device, upgraded to improve the effectiveness of grouting for crack repairing by incorporating the merits of the high pressure grouting of packer and the merits of syringe injector.
② Syringe injector is a low-pressure, low-speed grouting device. A syringe injector containing the resin is set on the cracks and the resin is slowly injected with the help of resilience of the rubber band.
As explained above, you can employ various kinds of methods by using numerous grouting devices. The following work guidelines are based on the syringe injector, the representative low-pressure grouting method. You are free to change the materials depending upon the site condition. Please refer to the reinjector method and packer grouting method to learn how to use.

All the equipments and tools that are used for this operation should be cleaned when the operation is finished. Detergent such as M.E.K, Acetone, Xylene, Toluene and epoxy thinner should be used when cleaning. If the Foam is smeared on your skin during the performance, wash it immediately with flowing water.

- When you treating medical fluid, make sure you wear protective helmet, goggle clothes and other protective devices.
- If the medical fluid is smeared on your skin, wash it off immediately and clean up with soapy water.
- All the hand tools and equipments that are used for this operation should be cleaned with thinner thoroughly.
- If you are working in sealed room, then make sure to conduct constraint ventilation for clean air.
- If the medical fluid is smeared on your skin and causes skin trouble, then you should go see specialist for prescription.
- If the temperature is below 5℃, then you must artificially raise up the temperature of medical fluid. This way you can get proper Pot Life.
- If the atmosphere temperature is high and the area is humid, Pot Life of medical fluid quickens. On the contrary, Pot Life will slow down in low temperature area.
- Be aware of it before you conduct the operation.

Recommended temperature for storage is 10~25℃ with no moisture. Store it in cool area. Storing period is about 6 months in sealed condition however it can be corrupted according to storing area and conditions. Preferably use it as soon as possible.