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Federal Highway Administration Research and Technology
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Publication Number: FHWA-HRT-05-152
Date: February 2006
Guidelines for Review and Evaluation of Backcalculation Results
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This report documents a new approach, called forward calculation, used for determining layered elastic moduli from in situ load-deflection data. Guidelines are provided for carrying out forward calculation procedures as well as screening Backcalculation results using forward calculated moduli.
This report will be of interest to highway agency engineers involved in pavement analysis, design, construction, and deflection data collection, as well as researchers who will use the Long-Term Pavement Performance (LTPP) load-deflection data to improve design procedures and standards for constructing and rehabilitating pavements.
Gary L. Henderson
This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in this document. This report does not constitute a standard, specification, or regulation.
The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report only because they are considered essential to the objective of the document.
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Technical Report Documentation Page
Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
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