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Backcalculation of Layer Parameters for LTPP Test Sections, Volume I: Slab on Elastic Solid and Slab on Dense-Liquid Foundation Analysis of Rigid

Primary Topic: Rigid Pavement

Description: This report documents a study conducted to backcalculate layer material parameters for rigid pavements included in the Long Term Pavement Performance (LTPP) program. Using the “bestfit” algorithm, layer material properties were backcalculated using both the slab on elastic solid foundation and the slab on dense-liquid foundation models. The analysis was conducted for all General Pavement Studies (GPS), Special Pavement Studies (SPS), and Seasonal Monitoring Program (SMP) test sections. Data tables that include the backcalculation results were developed for inclusion in the LTPP Information Management System (IMS). This report documents the results of backcalculation of layer material properties for rigid pavements included in the Long-Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data.

This study backcalculated the layer material properties for rigid pavements using the slab on elastic solid foundation and the slab on dense-liquid foundation procedures. The "best fit" algorithm was used after consideration of alternative methods of backcalculation. Pre-processing and post-processing utility software were developed to facilitate data handling. The backcalculation analysis was conducted for all General Pavement Studies (GPS), Special Pavement Studies (SPS), and Seasonal Monitoring Program (SMP) test sections. Data tables that include backcalculation parameters were developed for inclusion in the LTPP Information Management System (IMS).

FHWA Publication Number: FHWA-RD-00-086

Publication Year: 2000

Document Links: PDF (file size: 0.7 mb)

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