Rubberized Asphalt Concrete Warranty Pilot Projects: Volume 1: Construction Report

From 2002 through 2004, the California Department of Transportation (Caltrans) built five pilot projects through its rehabilitation program that contain specifications for rubberized asphalt concrete (RAC) overlay and include a 5-year warranty on the RAC materials and workmanship. The overall objective of these RAC warranty pilot projects was to provide a “level playing field” for “wet process” (rubber-modified asphalt binders produced in the field or at a terminal) and “dry process” (CRM as an aggregate substitute) rubber-modified mixes that contain a minimum of 15% CRM (by total mass of binder). This report is Volume 1 of a three volume series. Volume 2 is the interim performance report, which accompanies this report and includes performance monitoring results to date. Volume 3 will be a final report which will be prepared at the completion of the 5-year performance monitoring period. This report presents a compendium of the available information related to site conditions, design, materials, and construction for the five individual RAC warranty projects. The objective of the report is to provide information that will supplement annual performance monitoring data and will help identify factors related to materials and/or construction that may affect the performance of the respective RAC pavements. Each of the 5 projects is presented in an individual chapter that addresses: traffic and environmental data; preconstruction activities including deflection testing, structural design, pavement condition survey; selection of performance evaluation sections (PESs) for warranty enforcement; surface preparation; construction activities; and, post-construction testing and/or monitoring. Performance of the respective projects and PESs is to be evaluated over time. Annual monitoring will provide the performance information required for warranty enforcement. However a full evaluation of RAC performance requires consideration of materials characteristics (including but not limited to gradation, binder content, mixture voids, stability), construction factors including compaction, structural adequacy of the pavement section including subgrade and base courses, and site conditions including drainage.

Language

  • English

Media Info

  • Media Type: Print

Subject/Index Terms

Filing Info

  • Accession Number: 01046874
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: CALTRANS, TRIS, STATEDOT
  • Created Date: Mar 21 2007 3:43PM