Using Cost, Mix Design, Construction, and Performance Data to Inform Pavement Policy and Standards

摘要

This paper integrates in-service hot mix asphalt pavement data from several typically available but disconnected data sources to inform pavement policy and specification development. Leveraging the resultant large amount of connected cost, mix design, construction, and performance data can supplement existing laboratory experimentation, field trials, and test sections. Specifically, Washington State Department of Transportation (WSDOT) data from 2007 to 2017 are manually integrated to address a range of relevant policy and specification questions. While integration is done manually for this paper, recent advances in data storage capabilities can automate such integration. For this paper, WSDOT pavement performance questions regarding (1) 9.5-mm versus 12.5-mm nominal maximum aggregate size (NMAS) mixtures, (2) the influence of elevated in-place density mixtures, and (3) the influence of high reclaimed asphalt pavement (RAP) mixtures (>20%) are analyzed. Ultimately, the integrated data analysis approach exhibits the potential to show in-service performance trends supporting current pavement practices.