| This investigation was conducted in an effort to examine the effectiveness of geotextile fabrics used in conjunction with hot mix asphalt overlays over existing hot mix asphalt pavement sections in the jurisdiction of the Engineering Department of Washoe County, Nevada. More specifically, the analysis was focused on the effects of the fabric placement on cracking visible at the surface of the new overlay sections, most notably reflective cracking transferred from the existing pavement prior to the overlay.; Only the surface of the pavements were explored using the visual condition survey methods utilized by the Micro PAVER software and pavement management system on multiple overlay projects constructed from 1983 to 2003. The distress measurements of the analysis sections were conducted just prior to the overlay placement and approximately one, three, and five years following the overlay application. The overlay thicknesses varied from 1.5 to 2.5 inches with and without fabric placements. |
