Evaluating the potential use of a portable LFWD for characterizing pavement layers and subgrades

Document Type

Conference Proceeding

Publication Date

1-1-2004

Abstract

An evaluation of the Light Falling Weight Deflectometer (LFWD) device to reliably measure the in-situ elastic modulus of pavement layers and subgrades is presented in this paper. For this purpose, field tests were conducted on selected highway sections from different projects with in Louisiana. In addition, six test sections were constructed and tested at the Louisiana Transportation Research Center (LTRC) Pavement Research Facility (PRF) site. All sections were tested using the Prima 100 model - LFWD in companion with other standard tests including the Falling Weight Deflectometer (FWD) and the Plate Load Test (PLT) that were used as reference measurements. Regression analyses were conductedo determine the best correlations between the elastic modulus obtained from LFWD and those obtained from FWD and PLT tests. Good correlations were obtained, which demonstrated that the LFWD can be a promising device for in-situ characterizing of highway layers and subgrades.

Publication Source (Journal or Book title)

Geotechnical Special Publication

First Page

915

Last Page

924

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