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CONCRETE RAISING WITH POLYURETHANE
Up until September 28, 2003, using polyurethane as a material to perform Concrete Raising was protected by a patent. That patent has expired on September 28, 2003 allowing anyone to pump polyurethane under concrete slabs to lift them back into position or to fill voids. You can view the patent by clicking here. Deep injection using polyerethane is still protected by another patent, but now slabraising using polyurethane may be performed by any contractor as long as they are not violating the deep injection method.
The primary advantage of using polyurethane instead of grout is the light-weight nature of polyurethane. For applications that require a light substance, polyurethane can acheive a wieght of as little as 3 lbs per cubic foot and a compressive strength of 40 PSI. While this is not nearly as strong as grout, it is sufficient to hold a concrete surface in place.
The equipment and procedures required to inject polyurethane is a bit different than with grout. For a qualified contractor that can perform Concrete Raising using polyurethane click here.
Download typical polyurethan material & installation specifications here.
Advantages of using polyurethane for Concrete Raising
Light-weight material
Easy to mix on-site and easy to pump and control
Immediate loading
Disadvantages of using polyurethane for Concrete Raising
More expensive than grout
Less compressive strength than grout
Chemical substance may be subject to decomposition under grade
Flamable
Compare grout material to polyurethane by Clicking Here.
Contact a Local Contractor that provides these service Today.
Learn about Void Filling
Learn about using Concrete Raising for Roads & Streets
Learn about using concrete raising for warehouse and industrial floors
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