Crack injection is a proven method to repair cracks in concrete, and CCR utilise two different methods of injection to repair cracks.
- Pressure injection can be used in vertical or overhead surfaces. Using injection flanges placed at regular intervals, a two-part low viscosity epoxy resin is pressure injected into the injection points, sealing the crack.
- Gravity feed can be used on floor cracks using the low viscosity properties of the epoxy resin to inject (feed) the crack. The surface of the crack is ground out or a sealant placed around the crack to form a dam to feed the crack and constantly topped up as resin is fed into it. Both these methods are proven and successful applications for repairing cracks to concrete.
Polyurethane injection grout is a multi-purpose injection resin designed to seal leaking cracks, voids or fractures in concrete structures. The single component system reacts with water to form foam that expands filling the void and forming a tight, impermeable elastomeric seal, stopping the water flow.
The resulting appearance of the polyurethane is dependent on the amount of water encountered. This hydrophilic formulation contains no TDI or solvents.
The system benefits include high elongation, flexibility and easy installation. The liquid may be pumped as a single component directly into a leaking crack, fracture or joint or injected with water. Typical applications include:
- Sealing against water ingress
- Sealing against leaking cracks and joints
- n Sealing against water in masonry and brickwork
- Void filling n Back grouting Advantages
- High tensile adhesion
- Expands up to 25 times initial volume
- Solvent free, environmentally safe
- Excellent adhesion to most surfaces including concrete, brick and mortar
- Resistant to most organic solvents, mild acids and alkalis
- Rapidly forms a highly resilient flexible seal that allows movement to the crack, fracture or joint
- Reacts even with sea water or mineral water
- Complies to AS/NZS 4020:2005