Using RAP in slurry seals

by Greg Udelhofen
Created: March 7, 2008

Pavement Recycling Systems Inc. of California adds reclaimed asphalt pavement (RAP) to slurry seals as part of its expanding preservation toolbox.

One of the test areas before using reclaimed asphalt pavement (RAP) instead of virgin aggregate.
One of the test areas before using reclaimed asphalt pavement (RAP) instead of virgin aggregate.
One of the test areas after using reclaimed asphalt pavement (RAP) instead of virgin aggregate.
One of the test areas after using reclaimed asphalt pavement (RAP) instead of virgin aggregate.
On the Key Street test project, crews milled three inches of the old road surface, took the material back to Colton for crushing - blending it with a latex modfied emulsion - and then returned the mix...
On the Key Street test project, crews milled three inches of the old road surface, took the material back to Colton for crushing - blending it with a latex modfied emulsion - and then returned the mix to the road for cold placement.
The Colton facility produces three recycled aggregate products: Rap-Seal, ReRAP and ReNew Pavement.
The Colton facility produces three recycled aggregate products: Rap-Seal, ReRAP and ReNew Pavement.
Slurry equipment is used to transport unmixed materials and blend them together in a continuous-flow pugmill. With mixing and spreading accomplished in one continuous operation, treated roads can be...
Slurry equipment is used to transport unmixed materials and blend them together in a continuous-flow pugmill. With mixing and spreading accomplished in one continuous operation, treated roads can be reopened to traffic within a few hours.

?Using RAP requires less emulsion and the agencies we?ve worked with like the darker look of surface treatments that contain RAP aggregate,? he states. ?Our customers realize there is a shortage of quality aggregates in Southern California, so if we can deliver an alternative product that performs as well as a standard aggregate material, they?re willing to consider it.

?In 2007 we used approximately 6,000 tons of RAP aggregates in slurry and chip seal applications, and we expect that to increase to 20,000 tons this year,? he adds. ?We believe and many of our (road agency) customers believe it?s a viable solution to meeting the infrastructure maintenance needs of our area.?