Foundation Supportworks by Woods serves Collinsville, IL

Commercial Concrete Leveling Case Studies: PolyLevel Chosen by IDOT to Repair Illinois Highway in Belleville

Monday, June 5th, 2017 by Desiree Bainbridge


The Illinois Department of Transportation (IDOT) was receiving complaints from motorists that
large bumps existed on a recently resurfaced section of HWY 15. A visual inspection of the area
confirmed the issue and identified the source to be slope failure effecting the fill soil beneath
the impacted area.

Commuter safety and protection of previous work required an immediate, but economical
resolution to this issue. Mudjacking and concrete replacement were deemed to be either too
expensive, too time consuming or both and neither option could be mobilized in the desired
timeframe. Recalling the recent success on I64, IDOT recommended the prime contractor, Keller
Construction, contact Foundation Supportworks by Woods.


Foundation Supportworks by Woods visited the site and determined that a 12’ x 90’ section
of highway had settled approximately two inches. To resolve this issue, Woods recommended
PolyLevel 400 Hydrophobic (PL-400H) be installed beneath the impacted area. PolyLevel® is a
two-part urethane that expands and cures in to a rigid foam used to fill voids, stabilize slabs and
lift concrete. Once injected through small 5/8-inch drilled “ports” in a slab, a chemical reaction
converts the liquid urethane components into a strong, rapidly-setting foam. In its foam state,
PolyLevel® is extremely light, weighing 4 to 7 pounds per cubic-foot (pcf). Other void-filling
or lifting materials can weigh upwards of 120 pcf, adding significant stress to supporting soils
which will contribute to further settlement issues. With a minimum compressive strength of 80
pounds per square inch, PolyLevel® 400 Hydrophobic provides more than enough strength to
support even heavy highway traffic.

In a single six-hour shift, Foundation Supportworks by Woods injected 1,200 pounds of PL-400H
under the impacted slab returning it to its original position. Because of PolyLevel’s® extremely
fast cure time, the highway was ready for traffic even before the barricades were removed.
IDOT was amazed at the precision of the lift as well as the speed and cost of the repair.

Project Summary

Certified PolyLevel Installer: Chris Blickenstaff

About the author
Desiree is a digital marketing coordinator at Woods Basement Systems.
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