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Alternative Pavement Rehabilitation Strategy Using a Geogrid Interlayer is a research grant from the Nebraska Department of Transportation that funds investigation into improved rehabilitation methods for asphalt concrete-Portland cement concrete (AC-PCC) composite pavements. AC-PCC composite pavements represent over 91,000 centerline miles of U.S. roadway, where reflective cracking is a major performance issue.
This grant supports research into the use of geogrid interlayer systems to retard reflective cracking when placing asphalt overlays on repaired Portland cement concrete. The award is ,185 and is specifically targeted to the University of Nebraska-Lincoln's Civil and Environmental Engineering Department.
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Alternative Pavement Rehabilitation Strategy Using a Geogrid Interlayer - RIP Alternative Pavement Rehabilitation Strategy Using a Geogrid Interlayer A common pavement rehabilitation strategy to address structural and functional deficiencies of the underlying pavement involves repairing the damaged Portland cement concrete (PCC) layer and placing a 4- to 6-inch asphalt concrete (AC) overlay.
The AC-PCC composite pavements comprise a significant portion of roadway mileage in the U.S., representing over 91,000 centerline miles, including 9,500 centerline miles on the Interstate network alone. This process often requires costly and time-consuming concrete repairs before adding the asphalt layer, yet it does not guarantee the durability of the rehabilitated pavement section.
According to the 2024 Federal Highway Administration (FHWA) report om Practices for Maintaining and Resurfacing Existing Composite Pavements, the performance of AC overlays on existing PCC pavements varies considerably. State departments of transportation (DOTs) reported performance lives of about 6 to 15 years for AC overlay.
The major distress affecting the performance of AC-PCC composite pavements is reflective cracking - a phenomenon of propagation of cracks from an existing cracked pavement surface into and through the newly laid overlay due to traffic and/or temperature induced stresses.
The distress due to reflective cracking can be retarded by the installation of different interlayer systems, which can improve the performance of the asphalt overlays by providing stress relief, reinforcement and moisture control.
Nebraska Department of Transportation Expected Completion Date: 20270731 Actual Completion Date: 0 Bituminous overlays ; Geogrids ; Pavement interlayers ; Portland cement concrete ; Rehabilitation Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements; Accession Number: 01945348 Source Agency: Nebraska Department of Transportation
Based on current listing details, eligibility includes: Universities, specifically the University of Nebraska-Lincoln's Civil and Environmental Engineering Department. Applicants should confirm final requirements in the official notice before submission.
Current published award information indicates $179,185 Always verify allowable costs, matching requirements, and funding caps directly in the sponsor documentation.
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