Journal Published Online: 01 December 2017
Volume 46, Issue 3

A Study of the Structural Performance of Flexible Pavements Using Traffic Speed Deflectometer

CODEN: JTEVAB

Abstract

The falling weight deflectometer (FWD) is a non-destructive testing device that has been used by many road agencies worldwide since 1980 for structural evaluation of flexible pavements. In early 2000, the world first Doppler laser-based traffic speed deflectometer (TSD) was developed by Greenwood Engineering, and now eight TSD vehicles are in use worldwide. The two main advantages of the TSD technology are: (a) the ability to carry out continuous bearing capacity measurements instead of discrete points, (b) that testing can be carried out at traffic speeds without the need for lane closures with a stationary device such as FWD. The objective of this paper was to study the structural performance of flexible pavements using TSD deflection data. The study successfully established a correlation between maximum deflections TSD-D0 and FWD-D0 that are derived from the two devices. This study also drew some interesting conclusions in that deflection data collected by TSD could be transformed to FWD equivalent structural numbers with simple models as derived in the study. The outcome of this study was an established methodology for reporting structural performance at network level utilizing TSD deflection data.

Author Information

Manoharan, S.
Portfolio Investment and Programming Branch, Brisbane, Australia
Chai, G.
School of Engineering, Griffith Univ., Australia
Chowdhury, S.
School of Engineering, Griffith Univ., Australia
Golding, A.
Portfolio Investment and Programming Branch, Brisbane, Australia
Pages: 10
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20160189
ISSN: 0090-3973
DOI: 10.1520/JTE20160189