Illinois DOT to Premiere Recycled Hot Mix Asphalt in Upcoming Projects

Illinois DOT to Premiere Recycled Hot Mix Asphalt in Upcoming Projects

Three projects using 97 percent recycled asphalt to be included on April bid.

April 30, 2013

The Illinois Department of Transportation (IDOT) has announced plans to construct three overlay demonstration sections featuring a Hot Mix Asphalt (HMA) surface mixture that contains more than 97 percent reclaimed and recycled materials.

The IDOT says that the HMA, which it is calling Total Recycle Asphalt, is the first ever developed in Illinois. The demonstration projects using total recycle asphalt are on the April 26 bid and are expected to reduce paving costs.

“We recycle and use over a million tons of reclaimed materials on our highways annually as a matter of everyday practice,” says Illinois Transportation Secretary Ann Schneider. “We believe Total Recycle Asphalt will take Illinois to a new level of environmental sustainability, and we hope it will inspire others to follow our lead.”

The demonstration projects will help the department evaluate the mix, measure the overall cost and establish its performance over time. Using Total Recycle Asphalt is expected to produce savings of about 20 percent for IDOT and local agencies using the new mix, compared to similar traditional HMA mixes.

Recycled components of the mix include reclaimed asphalt pavement from pavement millings, crushed concrete from public works projects, steel slag, a by-product from production of steel and reclaimed asphalt shingles from re-roofing of houses.

Only a small amount of new liquid asphalt is required in mix production for its durability. The new liquid asphalt provides a soft grade of asphalt to counter the hard and aged recycled asphalt from reclaimed pavement and shingles.