How to raise a settled section of Highway-I-43 Manitowoc Cty

After holes are drilled in the settled section of highway, polyurethane foam is injected under the slab. The foam expands to fill voids and raise the settled highway section. 15 seconds to expand, 15 minutes to cure. This job took 50 minutes start to finish, and used 205 lbs. of HMI polyurethane concrete raising material.