Grouting Chemical for Concrete | Stronger & More Durable Surfaces

Water stop grouting Method

Packer

Polyurethane Foam Resin Grouting Method

Polyurethane foam resin grouting method is a kind of work process in which foam resin is injected with the pressure of over 10kgf/cm² into cracks or air voids of defective concrete structures to prevent water leakage, or into the defective parts of under- ground structure or dam to prevent water leakage that has been caused by excessive water pressure. grouting chemical for concrete Polyurethane foam resin so injected makes a reaction when it meets water and immediately creates foam, which contains the gushing water of high pressure and blocks the water leakage from minute crack to ensure waterproof

Various Types of Polyurethane Foam Resin

Polyurethane based ‘Flexible Foam’ (DHP-1000, DHP-3000)
It is the single-component hydrophilic resin that hardens by reacting to water and forms soft,open celled foam of high density by discharging Co2. grouting chemical for concrete It becomes highly elastic after hardening and has a strong adhesive strength for wet surface.
Polyurethane based ‘Hard Foam’ (DHP-2000, DHP-4000)
It is the single-component hydrophobic resin that forms hard, closed celled foam which is not resilient to deformation. The hardened substance by foaming does not shrink.
Polyurethane based ‘Hard Solid’ (Ultra Con)
It is the dual component resin that requires different hardening time and shows high tensile,compression, adhesive strength after hardening.
Polyurethane based ‘Flexible Solid’ (Ultra Pack)
It is the dual component resin that requires different hardening time and shows high tensile,adhesive strength and elongation.

Comparison of properties of Polyurethane Foam Resin

Injection method for polyurethane resins

Polyurethane foam resin has a low viscosity, so you can inject it completely into the cracks or minute air voids in which water leakage is progressing by using high pressure injection pump.You are recommended to drill holes on the areas of water leakage at regular intervals and to use the packer with high pressure nozzle that we have developed to ensure that the foam resin makes a perfect infiltration into cracks or minute air voids. grouting chemical for concrete You can choose from a variety of packers depending upon the site condition.

Using Materials

It is specially designed to endure high pressure that is applied. Injected resin won’t flow backward and this packer is also specially designed not to leak resin around stabilized and fixed packer.
This is 1 component type high-pressure injection equipment that is specially manufactured to fill on a leakage and fracture spot by using polyurethane foam and epoxy injection material.

How to drill holes and set the injection packer on crack

After installing the packer, the drilling of the concrete surface must be cracked to be equal to or greater than 60 degrees, as can be seen in the picture above. The location of the drilling must be 10cm from the area of leakage to ensure that even the smallest spaces of the central crack can be entirely blocked. (According to the construction site, the angle or location of drilling may differ) The intervals between the drilling must be adjusted according to the width of the crack or the amount of water leakage. grouting chemical for concrete The drilling must be done in a zigzag shape from the crack. The intervals between the drilling must not exceed 20cm.