Causes of bleeding in a hot-in-place asphalt pavement

Hot-in-place recycling was used to rehabilitate a section of roadway in State highway. A 25-mm overlay was placed over the recycled layer. Shortly after construction, moderate to severe bleeding was observed in isolated areas throughout the recycled section. This study was carried out to investigate the potential causes of the bleeding of the pavement. The field observation and laboratory tests were conducted. The laboratory tests were performed using core samples taken from the bleeding and non-bleeding areas of the pavement. The test results showed that the bleeding was associated with the surface layer and tack coat. This paper demonstrates that hot-in-place recycling is viable method for correcting distress asphalt pavement. (c) 2007 Elsevier Ltd. All rights reserved.