United States Department of Transportation
i
Application of the Dynamic Cone Penetrometer to Minnesota Department of Transportation Pavement Assessment Procedures
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1997-05-01
[PDF-1.44 MB]
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Abstract:The Minnesota Department of Transportation (Mn/DOT) began testing the dynamic cone penetrometer (DCP) in 1991, finding the DCP an effective tool in the assessment of subsurface pavement conditions and strength. Researchers conducted extensive DCP testing and research on both the Minnesota Road Research Project (MnROAD) and several pilot project sites in an effort to understand its useful applications in Minnesota. Mn/DOT currently specifies two applications of DCP testing in its pavement assessment procedure. One application involves using the DCP as a quality control device during the backfill compaction of pavement edge drain trenches. The second application involves its use in quality control of granular base layer compaction. This report details these applications and includes a copy of both specifications in the appendices. Other non-specified applications of the DCP have included investigations of soft sub-cut areas, determination of the condition of base and subgrade materials, under full depth bituminous cracks, and monitoring of the effectiveness of subgrade fly-ash stabilization. Researchers recently analyzed MnROAD project DCP test results to determine the limiting DPI value for each particular subgrade: soil arid base type. The report presents recommended DPI limits.
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