LisLe Township Uses FDR To Save Money, Replace Roads and Satisfy Residents

FDR Replaces Three Residential Roads in Record Time

(Dupage County, IL; June, 2011)

The Problem – Low Volume Township Roads Need Replaced

It’s inevitable: time eventually imposes it’s will on bituminous surfaces. Even a well constructed road with a good base will eventually yield to unrelenting freeze-thaw cycles, oxidation and garbage trucks. In Lisle Township, located with Dupage County, IL near Downers Grove, they take pride in their township road system. The majority of these roads are low volume residential streets that see little more than residents coming and going throughout the day.

The time had come to do something about these three streets within Lisle Township, Katrine Avenue, Lomond Avenue and Elinor Avenue. The thin layer of HMA had begun the aging process of oxidation, cracking and spalling and years of patching the worst areas had reached the end of it’s effectiveness. Lisle Township’s Highway Commissioner, Michael J. Dow knew that full reconstruction was the answer but the funding required for that application was not available. The commissioner also recognized the impact on the residents would be significant, with over a month of construction estimated. This led Dow to evaluate other options and ultimately to FDR with cement Super Slurry.

Full Depth Reclamation – An Economical, Environmentally-Friendly Process

Full Depth Reclamation (FDR) is an economical, environmentally-friendly process in which the full flexible pavement section and a pre-determined portion of the existing subgrade are uniformly pulverized, treated with an approved compatible chemical additive (such as Portland Cement), re-shaped and re-compacted to serve as the base course of a new roadway. FDR uses the entire existing roadway to build a new, high-performance base instead of removing and landfilling existing materials. FDR is an in-place recycling process that provides long-term road base performance at a low cost, with minimal environmental impact, when compared to other “traditional” pavement rehabilitation techniques.

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