POLYLIFT & CONCRETE LIFTING
Scientific, Precise Concrete Lifting to Your Desired Elevation
For decades, the terms Slab Jacking and Mud Jacking have been used to define the act of raising sunken concrete. Using traditional methods the results and degree of precision have varied. In many cases, settlement issues are compounded due to the additional weight of the cement-based grout used to raise the slab.
Today, Poly Lift provides scientific advantages, proven methodologies, and a precise lifting action that can be controlled within 1/8 of an inch or less of your desired elevation. Concrete slabs that are settling or rocking can be stabilized by injecting structural polyurethane foam into the voids beneath the slabs. Slabs can also be lifted back to their original position using our Precision Lift process. The foam is fully expanded and traffic ready within 15 minutes (85% strength). The rigid foam re-establishes contact between the slab and the sub-grade and is strong enough for heavy traffic loads.
Poly Lift vs. Traditional Cement Slurry
|Unit Weight||150 PCF||10-12 PCF|
|Material Set Time||Hours to days||Less than an hour|
|Impact on Existing Subsoil||Increases overburden stress||Minimal stress|
|Size of Injection Hole||2″+||3/8″|
|Preparation of Material Onsite||Mortar mixers, dust control||Materials stored in trailer|
|Clean Out||Wash-out area on site||None required|
|Shrinkage||Yes (Relative to water)||None|
|Groundwater||Mortar mixers, dust control||Not affected|
Advantages for property owners, facility managers and government agencies (DOT):
- Less Time
- Less Weight
- Less Disruption
- Less Cost
- Less Environmental Impact
Advantages for contractors are identical, and also include these competitive benefits:
- Faster & Better Service
- Higher Profit
- Predictable Outcome
- Lasting Results
- True Differentiator
Eliminate the Cause
Settlement destroys the integrity of concrete slabs and foundations. The root causes are often due to poor compaction of fill materials, erosion, high water content (shrink and swell cycles), decaying organic materials or freeze thaw cycles.
Poly Lift fills voids, consolidates fill materials and eliminates water pathways. All of these functions assist in stabilizing and strengthening supporting soils.
Compaction Grouting, Permeation Grouting
Compaction grouting is a process by which rapidly expanding polyurethane foam (fully expanded in 30-60 seconds) is injected into the ground. The foam fills voids in the immediate area, fractures the soil with lenses and veins of resins, and compacts the surrounding soil using expansive pressure. Compaction grouting can be done with any of the Poly Lift products, depending on the density of foam the project requires.
Permeation grouting is typically defined as the flow of a low-viscosity grout into the pores of the soil without displacing or changing the soil structure. The characteristics of the ground are modified with the hardening or gelling of the grout. Permeation grouting serves two purposes, to increase the strength and cohesion of granular soils, and to decrease the permeability of the soil. The Poly Lift equipment is ideal for permeation grouting applications.
Poly Lift is a Long-Term Cure
Once you have stabilized and consolidated the sub-grade, it is time for the Lift process. A rapidly expanding foam is injected through small diameter holes directly beneath the slab in short bursts. By speeding up the reaction with heat and by controlling the amount of material that goes in beneath the slab, you are able to precisely control how much the slab is lifted.
This procedure requires specialized equipment and a well trained technician. Poly Lift products are designed specifically for this task.
Eliminate these sources of decay and your repair plan will be in sync with our promise-to-customer:
Do it Once, Right and For Good.