Void filling with our line structural polyurethane products provides a economical and environmentally friendly solution to prevent structure settling. Whether the void is a byproduct of natural settling under an existing slab or structure or the result of tunneling for a under slab plumbing issue, the option of refilling the void with soil will certainly result in soil settlement over time. The end result is potential damage to the surface structure. Our line of geo structural polyurethane products are designed to eliminate the natural settling of the replaced soil to prevent future problems with the above ground slab.
Plumbing void fills are the common application for our process. When a plumbing leak has occurred, the water introduced to the surrounding soil has saturated the area. The soil is then excavated to access the break in the plumbing the line. After the line has been repaired, the standard practice of “filling” the hole or tunnel with the same material leads to settling or compacting of this soil months after the fill. The voids created by this settling can cause the supporting slab to settle to a new grade. BY filling this cavity with a structural material that will compact the surrounding soil and fill 100% of the void with a non volume changing material will prevent future settling issues to the surrounding infrastructure.
Our polyurethane void filling has been used frequently for sea wall/lake applications, parking lot and driveway void fills where the concrete is still in a serviceable condition. Interior residential and commercial slabs that have been lifting with traditional parameter piers often need a void fill to support the interior areas of the slab after the pier has been completed. Water main breaks in roadways and parking lot areas can washout significant areas of soil for 100’s of yards away from the initial break. Void filling these areas can eliminate the costly concrete removal and replacement months after the initial repair is completed.