The process of concrete polyjacking is rather simple, consisting of three main steps:
First, a pattern of holes is drilled through the sunken slab of concrete.
A hydraulic pressure pump is used to inject polyurethane foam under the slab, raising it to the desired height. The amount of rise is carefully controlled using the A-Triple-M Contracting pumping unit.
After the concrete has been raised to the desired level, the injection holes are patched using a fast-setting sand/cement mixture or other patching material.
Levelling Foam: The levelling foam is a formulation of high-density polyurethane. This high-density, closed-cell polyurethane has the following characteristics and properties:
Polyurethane Foam: Polyurethane foam has a minimum compressive strength of 40 psi (275 kPa). Its formulation will reach 90% of full compressive strength within 15 minutes from injection.
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