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https://www.nationalacademies.org/trb/events

Evaluation of a Local Carbonate Aggregate Source for Pavement Surface Applications in the Bristol District

The purpose of this project is to evaluate the field frictional performance of surface paving applications incorporating a local carbonate aggregate source to support potential approval for use in surface applications in the Bristol District. This purpose will be accomplished through coordinated field trials, laboratory characterization, and continued monitoring of existing field sites. Specifically, the study will: (1) further evaluate the performance of existing field projects in the Bristol District to determine whether conclusions drawn from short-term performance monitoring remain consistent over a longer evaluation period, and (2) implement and monitor additional field trials incorporating carbonate aggregates in pavement preservation treatments and surface asphalt mixtures on roadways carrying traffic volumes greater than 750 ADT. The scope of this study includes friction and surface texture measurements of 14 field sections consisting of carbonate aggregate treatment sections and, where applicable, companion reference sections incorporating conventional non-carbonate aggregates. The evaluated sections will include both pavement preservation treatments and surface asphalt mixture applications. These field sections will be systematically monitored throughout the study period to assess friction and texture performance trends over time and to further evaluate the long-term field behavior of the local carbonate aggregate source under varying traffic conditions.