PERPETUAL PAVEMENTS and shoulder to the inside of the existing pavement. It was executed using full-depth reclamation (FDR) for the foundation layers and included cold central plant recycling (CCPR) as the asphalt structural layer above. The prime contractor was Allan Myers, with Slurry Pavers as the FDR subcontractor. The FDR in the existing lanes was completed by stabilizing the in-place △ continued from page 17 foundation material; while in the new lanes, the FDR stabilized imported recycled concrete aggregate. The CCPR for all lanes was produced using reclaimed asphalt pavement (RAP) from existing stockpiles and #10 aggregates, a quarry co-generated product. VDOT estimates that approximately 168,000 tons of existing stockpiled RAP was used to produce the CCPR. A study by Timm et al. (2018) estimated cost savings of approximately $10 million using the combination of pavement recycling techniques rather than traditional pavement materials. More recently, FHWA published a report (https://www.fhwa.dot.gov/pavement/ sustainability/case_studies/hif19078.pdf) on the environmental savings, which showed that these processes resulted in a significant reduction in primary energy demand and global warming potential. Therefore, not only was the project designed using Perpetual Pavement methodologies, but also notably reduced costs and environmental impact. Upon being recognized for the I-64 project, VDOT Hampton Roads District Engineer Christopher Hall, P.E. stated, “The Virginia Department of Transportation is honored to receive this national Perpetual Pavement Award for the design and delivery of top-quality pavement work as part of the 7-mile reconstruction and widening of the Interstate 64 corridor through James City County, York County, and the city of Newport News. Not only does this highlight our continued commitment to providing a long-lasting, high-quality product for an improved driving experience on the most heavily traveled corridor of the Virginia Peninsula, but also in incorporating innovative and eco-friendly approaches such as utilizing recycled materials, Cold Central Plant Recycling and Full Depth Reclamation, resulting in a significant estimated cost-savings of $10 million for the Commonwealth of Virginia. We are thankful for this recognition and hope this trailblazing approach can serve as a model to be replicated across the rest of the state and beyond.” Perpetual by Performance Many asphalt pavements function as Perpetual Pavements despite being built before the Perpetual Pavement concept began circulating in 2000. The Perpetual Pavement by Performance Award recognizes state agencies and other owners of pavements with the foresight to build pavements according to these principles. This award honors Perpetual Pavement projects that are at least 35 years old, have not suffered a structural failure, and have an average interval between resurfacing of no less than 13 years. “One of the keys to sustainability is long life,” explained Amy Miller, P.E., former I-64 Widening and Reconstruction Segment II in Newport News, James City County, and York County, PPA by Design Award Winner. PPA by Performance winner: Interstate 81 two-mile section (milepoint 109.8 to 111.8). 18 FALL/WINTER 2023
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