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The 2008 project

In 2008, the original street maintenance contract called for conventional slurry seal. Esbenshade, who was charged by Duarte's City Council with the task of not only executing a good road maintenance program, but to also look at ways to help the city go green by utilizing sustainable treatments that performed as well as conventional treatments.

After Pavement Coatings was awarded the contract, the contractor suggested using the RAP slurry seal based on the performance of the five-year-old test and the fact that it would help Esbenshade address the sustainability issue.

"We went back and took another look at the street we treated (with RAP slurry) five years ago and it looked like it held up well. In fact, it still had a darker (blacker) appearance than a conventional slurry-treated road," Esbenshade says. "Based on my experience with Pavement Coatings, I know they produce a high-quality RAP that is used in their slurry seals. So, I felt pretty confident in agreeing to go with 100% RAP on the 2008 slurry seal contract."

Pavement Coatings' sister company, Pavement Recycling Systems Inc. of Mira Loma, CA, produces the high-quality RAP slurry dust for the preservation contractor's projects. The recycling company invested a substantial amount of time in lab and crushing work to produce the best gradation of slurry RAP to guarantee performance and workability.

Testing and field applications have led to specific product quality control and application practices to insure that customers receive an end product of high standards. The cooperative efforts of Pavement Recycling Systems and Pavement Coatings have made it possible for both to produce a cost-effective sustainable solution for customers like the City of Duarte.