United States Department of Transportation
i
Spotlight on Pavement Density: Ohio Department of Transportation - Starting Out with Dielectric Profiling Systems
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2020-07-01
[PDF-838.55 KB]
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Abstract:The Ohio Department of Transportation (ODOT) purchased its first dielectric profiling system (DPS) unit in late 2018 with the goal of achieving better representations of the quality of newly laid asphalt than through its existing practice of obtaining sample cores. ODOT hoped the DPS unit would better identify the variability noticed from core samples and ultimately lead to changes during construction that would improve quality. DPS use a ground-penetrating radar (GPR) to determine the density of hot-mix asphalt, a key indicator for pavement quality control. After seeing promise in initial results from the first DPS unit, ODOT bought a second one in 2019. "We think a major step forward to getting more service life out of our pavements is to eliminate some of these built-in defects that maybe we don't recognize during the construction process," says Craig Landefeld, Administrator, ODOT Office of Pavement Engineering. "If we can improve the overall density and have uniformity, we're going to anticipate having less mid-cycle repairs and preventive maintenance."
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