Evaluating Resistance of Hot Mix Asphalt to Reflective Cracking Using Geocomposites.

摘要

The Pennsylvania Department of Transportation has sponsored a project with Penn State to evaluate new or existing products to ensure satisfactory application and performance of these products. PennDOT Publication 447 contains those products that are approved for application in lower-volume local roads. The objective of this effort was to review and evaluate a specific product listed in Publication 447 under specification MS-0360-0019, Bituminous Fiber Reinforced Stress Absorbing Membrane Interlayer (SAMI). The work toward evaluation of this product included three parts: a literature review, site visits, and an assessment of current specification under Publication 447. Evidence to date indicates satisfactory performance of this material and it is recommended that SAMI remain in PennDOT Publication 447. Emphasis should be placed on sealing cracks wider than 14 inch before application of SAMI. Field evaluation indicates that wide cracks, if not properly sealed, do migrate to the surface regardless of SAMI application.