Title

Improved Rolling Dynamic Deflectometer for Continuous Pavement Deflection Measurements

Authors

Authors

B. Nam;K. H. Stokoe

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Test. Eval.

Keywords

rolling dynamic deflectometer; continuous deflection profile; pavement; evaluation; Materials Science, Characterization & Testing

Abstract

Unlike discrete testing methods, the rolling dynamic deflectometer (RDD) performs continuous measurements. Thus, it is a powerful screening and evaluation tool for quickly characterizing large sections of highway and airfield pavements with little danger of missing critical pavement features. RDD testing applications have involved (1) pavement forensic investigations, (2) delineations of areas to be repaired, (3) selections of rehabilitation treatments, measurements of relative improvements due to the rehabilitation, and (4) monitoring of changes with time (trafficking and environmental loading). This paper discusses the efforts to improve the velocity of RDD testing up to 5 mph (8.0 km/h) while minimizing the accuracy and resolution of deflection data. The research consisted of the development of a velocity-improved rolling sensor and the field evaluation of its new sensor system. The velocity- improved rolling sensor and the enhanced data processing were tested in both flexible and rigid pavements at varied velocities. The enhanced RDD system potentially enabled testing velocities of up to 5 mph (8.0 km/h) in thin flexible pavements (i.e., farm-to-market roads) and up to 3 mph (4.8 km/h) in rigid pavements.

Journal Title

Journal of Testing and Evaluation

Volume

42

Issue/Number

2

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

312

Last Page

327

WOS Identifier

WOS:000335332200006

ISSN

0090-3973

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