详情

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

项目名称：	Field and HVS Evaluation of Extended Life Benefits of Pavement Preservation Treatments
摘要：	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.
状态：	Active
资金：	1410000.00
资助组织：	California Department of Transportation
项目负责人：	Holland, T Joe
执行机构：	Regents of the University of California, Davis
开始时间：	20080701
实际结束时间：	20111031
主题领域：	Highways；Maintenance and Preservation；Pavements