Use of Surface Treatments to Extend Pavement Life: A Case Study on US 301, Sussex County, Virginia

Monday, May 4, 2020 - 14:00

Typical maintenance activities by the Virginia Department of Transportation (VDOT) for existing asphalt pavements involving a periodic placement of a 1.5-in to 2-in layer of asphalt concrete are becoming increasingly costly.  When applied at the right time, pavement preservation treatments can restore a smooth, safe driving surface while saving money on future rehabilitation costs.  The purpose of this study was to evaluate the performance of three preventive maintenance treatments applied to US 301 in Sussex County, Virginia, to extend pavement life.  This report documents the installation of a cape seal application of FiberMat (i.e., FiberMat with microsurfacing on top) over an existing asphalt pavement.  FiberMat is designed to act as a crack-resistant membrane and incorporates two applications of polymer-modified asphalt emulsion with a layer of fiberglass strands between them.  The study also included a performance comparison with more conventional VDOT surface treatment options: regular cape seal (chip seal with microsurfacing), and microsurfacing without a chip seal. The report can be downloaded from Virginia DOT at


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