Field and HVS Evaluation of Extended Life Benefits of Pavement Preservation Treatments

The Partnered Pavement Research Center (PPRC) and the Department have performed laboratory and heavy vehicle simulators (HVS) studies of new, more crack-resistant asphalt mixes. The PPRC has also developed for the Department preliminary estimates of the cracking lives of their current most-used pavement preservation treatments based on mining of historical Caltrans performance data. The next steps toward implementation of the results are to place test sections to evaluate the effects of timing of treatment placement, as well as to further validate the results of the laboratory, HVS, and analytical studies with regard to the relative performance of the new mixes compared with current mixes. In this project, the PPRC will work with the Department to design experiments, and build and monitor field test sections from construction to failure following the test section guidelines in the Pavement Preservation Studies Technical Advisory Guide (PPSTAG). These sections will provide confirmation of previous studies regarding pavement life extension from placement of pavement preservation treatments at different stages of pavement deterioration. This will include existing asphalt and concrete pavements. Where the expected extended life is longer than five years, the HVS will be used in addition to field sections to provide early estimates of pavement life. The most likely need for HVS testing will be for rubberized overlays of concrete pavements. The treatments to be included in the experiments are expected to be: thin overlays for cracking resistance on concrete pavement and aged asphalt pavement; and aggregate seal coats, microsurfacings, and fog seals on aged asphalt pavements. The materials from thin overlays will be characterized in the laboratory for comparison with previous PPRC laboratory and HVS studies to determine the wider range of properties of these materials beyond the few examples included in the previous studies. These results will provide the Department with further information needed to recommend the best preservation treatments for a given age and condition of the pavement. The results will also be used to update performance tables in the Life Cycle Cost Analysis Manual and recommendations in the Maintenance Technical Advisory Guide (MTAG), and will provide additional materials data and performance model calibration data for mechanistic-empirical design. The monitoring and documentation of field performance will extend past the end of this proposed PPRC task order.

Language

• English

Project

• Status: Active
• Funding: $1410000.00
• Contract Numbers:

  SPE No. 4.24

• Sponsor Organizations:

  California Department of Transportation

  1227 O Street
  Sacramento, CA  United States  95843
• Project Managers:

  Holland, T

• Performing Organizations:

  Regents of the University of California, Davis

  Davis, CA  United States  95616
• Principal Investigators:

  Harvey, John

• Start Date: 20080701
• Expected Completion Date: 0
• Actual Completion Date: 20111031
• Source Data: RiP Project 22847

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Pavement design; Pavement maintenance; Service life
• Uncontrolled Terms: Pavement preservation
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 01466259
• Record Type: Research project
• Source Agency: California Department of Transportation
• Contract Numbers: SPE No. 4.24
• Files: RIP, STATEDOT
• Created Date: Jan 3 2013 3:13PM