DY-50 Low Pressure Injection (Crack Repair Method)

Syringe injection method developed by our company applies a principle to inject to the inside of minute crack, making use of the surface tension and capillary
phenomenon to suck up water without power. In most of traditional injection methods, injection was made with high speed and pressure and that's why sealing material often break and injection material flow out. In the result of this, complete injection is impossible. It can be possible for complete injection using our Syringe Injector DY 50 featured automatic low-pressure, low-speed and long-time. Also it can improve the efficient of work and examine the state with the naked eye.

• To fill up, repair, reinforce cracks in concrete, slab, wcross-beam and foundation work.
• To fill up, repair, and reinforcement excitation of concrete structures such as dams, floodgates, bridge, piers, psyro, power plant, chest pipes, etc .

• Easy to work.
• Can be used for both small and large quantity.
• Can be attached at horizontal, vertical or any direction.
• Possible for repairing at original state without breaking or destroying the structure,
• Cost saving and Less time.
• Possible to inject to the corer using angular stands.
• Possible to inject deeply into the crack due to low-pressure.

❶ The crack condition, including its width, depth, and overall state, must be thoroughly inspected beforehand to establish the appropriate repair procedure.
The sealing area is prepared by first removing dust and loose debris using a wire brush. Any remaining contaminants or stubborn residues on the surface are then meticulously cleaned with a cleaning solvent.

❷ The optimal locations for fixing plate installation are determined according to the crack condition of the base plate installation area. Fixing plates are typically installed at a rate of 5 units per meter, with each unit spaced 20cm apart.

❸ Mixing
Mix approx. 100g each of the resin and hardener in equal proportions, ensuring thorough combination.

❹ Seal the crack surface with spacer seal (1mm thick × 30mm wide) to prevent the injected epoxy from leaking, excluding the base plate attachment area.

❺ Apply spacer seal (epoxy sealant) to the underside of the base plate according to the installation markings, then secure the base plate. Suspend work until the sealant is fully cured, typically requiring 24 hours at 25°C."

❻ Utilize a low-pressure injector to fill a 30cc syringe cylinder with CrackFix (epoxy injection agent).
Mount the base plate and connect rubber bands to secure the injector to the base plate.
Repeat this setup to attach all low-pressure injectors to the base plate.
Prior to initial setting, if the injection material in the syringe cylinder is depleted, promptly replace it with a replenished cylinder to ensure continuous reinjection. The process typically requires 48 hours at 25°C for completion.

❼ Finishing Process
After verifying that the injected material has fully hardened, remove the syringe cylinder and base plate, then clean the surface thoroughly.

※ When applying paint to the upper surface, first coat the area with One-Coat Crack Cover, followed by the final paint layer.