United States Department of Transportation
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User's guide: estimation of key PCC, base, subbase, and pavement engineering properties from routine tests and physical characteristics
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2012-08-01
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[PDF-2.65 MB]
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Edition:Interim report.
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Materials;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;
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Abstract:Material characterization is a critical component of modern day pavement analysis, design, construction, quality
control/quality assurance, management, and rehabilitation. At each stage during the life of a project, the influence of
several fundamental engineering material parameters on the long-term performance of the pavement can be predicted
using advanced tools like the American Association of State Highway and Transportation Officials Mechanistic-
Empirical Pavement Design Guide (MEPDG). Consequently, there is a need for more information about material
properties, which are addressed only to a limited extent with currently available resources for performing laboratory
and field testing. Reliable correlations between material parameters and index properties offer a cost-effective
alternative and are equivalent to the level 2 MEPDG inputs. The Long-Term Pavement Performance (LTPP) database
provides data suitable for developing predictive models for Portland cement concrete (PCC) materials, stabilized
materials, and unbound materials, as well as other design-related inputs for the MEPDG. This user’s guide provides a
summary of the models developed, describes their applications for specific project conditions, and lists their
limitations. The following models are included:
• PCC materials: Compressive strength, flexural strength, elastic modulus, tensile strength, and coefficient of
thermal expansion.
• Stabilized materials: Elastic modulus of lean concrete base.
• Unbound materials: Resilient modulus of fine-grained and coarse-grained materials.
• Rigid pavement design features: Pavement curl/wrap effective temperature difference for jointed plain
concrete pavement and continuously reinforced concrete pavement designs.
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