Concrete Overlays in Missouri Save Time, Improve Safety
Concrete overlays can save significant amounts of time compared to traditional methods. The Missouri Department of Transportation (MoDOT) learned just how much when it needed to resurface a nine-mile stretch of I-44 near Rolla, Missouri, part of the main connector between the Lake of the Ozarks and St. Louis. With the Lake of the Ozarks being a major recreation and vacation destination, construction-related traffic delays were a major concern; therefore, the contract specified 90 calendar days for completion. Two miles of the project involved milling 11 inches of the existing asphalt pavement and inlaying an 11-inch concrete overlay. Seven miles of the project involved placing an 8-inch unbonded concrete overlay using a geotextile fabric as the separation layer. The contractor paved 219,137 square yards of concrete in 47 days and turned over the project to the State in only 66 days.
To learn more about concrete overlays, visit the FHWA TOPS website or watch a recent webinar called “Concrete Overlays: A Proven Technology.” Webinar topics include an introduction to concrete overlays, challenges, maintaining existing pavements, the value proposition, how to get started, and project highlights. For additional information, contact Robert Conway, FHWA Resource Center.
(Reprinted from EDC Newsletter)