HMI foams providing infrastructure solutions

Company: RaiseRite
Project: I-294 Illinois State Tollway
Product: RR601 | 6 lb. Foam


Various areas of a 42 mile stretch along I-294 had experienced settlement, leading to dips and bumps that posed safety challenges for drivers. The project had to be completed during the night, due to the high traffic volumes of the tollway during the day and the inability to have lane closures restricting steady traffic flow. The project, due to size needed to be completed in five stages. The Illinois State Toll Highway Authority released a bid letting for the raising of the tollway transition, approach, and sleeper slabs using high density polyurethane foam. They required an experienced contractor solve the problem.


The bid letting specifications called for a 6 lb./cu.ft. foam with a minimum tensile and compressive strength of 90 psi. RaiseRite exclusively uses HMI Foams (world leader in concrete lifting equipment and materials), and HMI had a foam that easily met the requirements of the project. The project called out a total of 100,650 pounds of material to be used. RaiseRite Concrete Lifting, Inc. of Manitowoc, Wisconsin was awarded the project after bid opening as a subcontractor through a large general contractor in the state of Illinois. Since RaiseRite’s work was part of a larger rehabilitation project, there would need to be clearly stated communications and processes among all parties involved in the project.

The work was to be performed in stages. Five different areas needed to be raised along five lanes, approximately 100 feet on both sides of bridges, where the settlement had occurred. The specifications also called for a truck mounted pumping unit with certified flow meters able to measure the amount of foam injected. In order to inject the foam, RaiseRite needed to drill out 5/8” holes on a 4 foot grid pattern. Once the holes were drilled out, a zerk was inserted into each hole. The injection gun fastened to the end of the pumping hole was clamped to the zerk, allowing the polyurethane foam to be injected under the slab.

RaiseRite used a zip level and string line, approved by the Toll Highway Authority to monitor and measure elevation, ensuring and even plane on the roadway.

The project entailed RaiseRite drilling approximately 2,000 access holes and pumping a total of 84,744 pounds of HMI RR601 polyurethane foam to complete the job. The areas of roadway raised varied in amounts from as small as ½” to as much as 5”. Throughout the project, the Tollway engineer and a representative from the general contractor were always on site to monitor the work, and verify lane closures were being followed for the safety of the crews and travelers. RaiseRite successfully raised the areas required within the project scope ensuring a smooth roadway service for travelers.

About HMI

When HMI founder Ernie Cvetezar started his own concrete raising business in 1974, he asked for concrete raising tips from the manufacturers of the pumps he used. To his surprise, the answers he received were. “We make the equipment, we don’t know how to use it.” From that moment on, Ernie vowed to fully support every customer that purchased the equipment he manufactured. This began with his invention of the first fully hydraulic mudpump. Since then, HMI has been a world leader in concrete raising equipment, systems, and materials.

From mudpumps, polyurethane foam systems to Discovery and Training seminars, to helping entrepreneurs start concrete raising businesses, Ernie and the HMI team have never broken their promise to fully support our customers. All equipment and materials designed and produced by HMI, are field tested through RaiseRite, Inc. to ensure superior quality and performance.

Are you a larger D.O.T. contractor in need of superior concrete lifting equipment and materials?

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