United States Department of Transportation
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Layer moduli of Nebraska pavements for the new Mechanistic-Empirical Pavement Design Guide (MEPDG).
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2010-12-01
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[PDF-2.65 MB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-PLANNING AND POLICY-Management Systems;
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Abstract:As a step-wise implementation effort of the Mechanistic-Empirical Pavement Design Guide (MEPDG) for the design
and analysis of Nebraska flexible pavement systems, this research developed a database of layer moduli — dynamic
modulus, creep compliance, and resilient modulus — of various pavement materials used in Nebraska. The database
includes all three design input levels. Direct laboratory tests of the representative Nebraska pavement materials were
conducted for Level 1 design inputs, and surrogate methods, such as the use of Witczak’s predictive equations and the
use of default resilient moduli based on soil classification data, were evaluated to include Level 2 and/or Level 3 design
inputs. Test results and layer modulus values are summarized in the appendices. Modulus values characterized for each
design level were then put into the MEPDG software to investigate level-dependent performance sensitivity of typical
asphalt pavements. The MEPDG performance simulation results then revealed any insights into the applicability of
different modulus input levels for the design of typical Nebraska pavements. Significant results and findings are
presented in this report.
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