PERFORMANCE AND REPAIR OF UTW PAVEMENTS

Abstract

Since its inception in the early 1990s, ultra-thin whitetopping (UTW) technique has rapidly developed into a viable pavement rehabilitation alternative for deteriorated asphalt pavement. The development of the mechanistic design procedure in 1997 represented a milestone in the development of this technology. Over 150 UTW pavements have been built in the last decade. As the UTW technology matures and with many existing UTW projects in services, it is essential to review the performance of existing UTW pavements to understand their behavior under traffic and to establish repair and rehabilitation techniques once distresses occur. The purpose of this 7th International Conference on Concrete Pavements – Orlando, Florida, USA – September 9-13, 2001 paper is to present the results of studies conducted dealing with UTW pavement performance reviews and repair and rehabilitation experiences. The effectiveness of using currently available concrete pavement repair and rehabilitation procedures is explored. The paper includes detailed performance descriptions of several existing UTW pavements in Georgia and Tennessee and the UTW repair and rehabilitation projects conducted at the Federal Highway Administration’s (FHWA) Pavement Testing Facility and in several states.