Roller Compacted Concrete is Perfect Solution for New York School Parking Lot

Wayne Steven, owner of The Wayne Companies in Northwestern Pennsylvania and Southwestern New York recently completed a Roller Compacted Concrete (RCC) unbonded overlay for a local Catholic school parking lot (shown below). The roughly 50,000 sq. ft. parking lot was paved with 4 inches of RCC directly on the existing asphalt, which makes it one of the few, if not the only, unbonded overlay projects using RCC in the country, notes NRMCA Senior National Resource Director Doug O'Neill. By utilizing a conventional asphalt paver and hauling the RCC in dump trucks, Wayne was able to encourage the owners that RCC could solve their situation more economically than tearing up the old asphalt and replacing with either new asphalt or conventional concrete.

"Wayne relied heavily on the Guide to Concrete Overlays of Asphalt Parking Lots," O'Neill said. The guide was initiated by the NRMCA Promotion Committee and funded by the RMC Research & Education Foundation, along with being produced by the National Concrete Pavement Technology Center at Iowa State University's Institute for Transportation.

Despite RCC's low rate of shrinkage cracking, the decision was made to joint the pavement similar to a conventional overlay to reduce the risk of reflective cracking from the old asphalt. The new RCC parking lot came in under the asphalt bid and should provide years of service due to the durability of concrete.