Proven models and procedures to design and construct low-cost, long-life composite pavement systems
New Composite Pavement Systems (R21)
Pavements that combine layers of asphalt and concrete generally have a long service life with excellent surface characteristics, structural capacity, and the ability to be rapidly renewed. However, the majority of roads containing these composite pavements resulted from maintenance and rehabilitation activities. Few roads are intentionally designed to utilize composite pavements because reliable guidance for designing and using these materials has been lacking. U.S. Transportation agencies require guidance, specifications, objective and reliable performance data, and life-cycle cost analyses to support use of these pavement systems.
SHRP2’s Composite Pavements Solution provides detailed performance data on existing composite pavement systems, and offers step-by-step guidance on two types of composite pavements (Hot-Mix Asphalt (HMA) over Portland Cement Concrete (PCC) and PCC over PCC [constructed wet on wet]) using procedures consistent with the Mechanistic-Empirical Pavement Design Guide (MEPDG).
With the new guidance, models, techniques, and specifications, State and local departments of transportation and other organizations can have confidence that the new composite pavement systems they install and maintain will be long lasting and have predictably low life cycle costs. Agencies will no longer need to develop construction specifications and quality management guidelines on their own, but instead, can consider using these guidelines. The training tools and case studies include relevant design and construction issues, and are essential to widespread adoption and use of composite pavements.
In the Field
|Illinois||Construction, data collection, and monitoring of PCC/PCC and HMA/PCC test cells||Research||
|Minnesota||Construction, data collection, and monitoring of PCC/PCC and HMA/PCC test cells||Research||
|Tennessee||Implementation Assistance Program – The Tennessee Department of Transportation will implement wet-on-wet concrete pavement on an existing project in order to compare costs from polish-resistant aggregate in full-depth concrete versus a composite pavement with resistant aggregate only in the top portion of the pavement.||Lead Adopter||
|Texas||Implementation Assistance Program – The Texas Department of Transportation (TxDOT) is adopting best composite pavement practices in order to maintain the expected quality life of the pavement. Workshops and assistance to the district’s designers and contractors will be provided. TxDOT will work closely with both the Texas Concrete Paving Association and the Texas Aggregate and Concrete Association to promote the use of this method.||Lead Adopter||