United States Department of Transportation
i
Spotlight on Pavement Density: North Dakota Department of Transportation: Working with the Dielectric Profiling System
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2022-01-01
[PDF-690.32 KB]
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Abstract:The North Dakota Department of Transportation (NDDOT) acquired a dielectric profiling system (DPS) in 2020 after neighboring Minnesota DOT (MnDOT) demonstrated the technology’s potential on a local construction project the previous year. NDDOT had been concerned that its existing practice of obtaining sample cores from newly-placed asphalt provides too small a representation of the density of rest of the mat. “We felt that the DPS could probably provide you a more comprehensive picture about the density of the asphalt, along with eliminating some of the need for destructive coring,” says Amy Beise, NDDOT Research Manager. DPS technologies use ground-penetrating radar that can be correlated to the placement uniformity and density of an asphalt pavement mat, both of which are key indicators of pavement performance. The system that NDDOT uses is mounted on a pushcart with three sensors that collect dielectric readings from the newly compacted asphalt.
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