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Proceedings Paper

Continuous highway pavements deflection measurements using a rolling dynamic deflectometer (RDD)
Author(s): James A. Bay; Kenneth H. Stokoe; W. Ronald Hudson
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Paper Abstract

Nondestructive testing of pavements plays an important role int he management of pavement infrastructure. A new technique for continuous profiling of pavements is under development. This technique involves the Rolling Dynamic Deflectometer (RDD). The RDD is a large truck on which a servo-hydraulic vibrator is mounted. The vibrator is used to apply large vertical dynamic loads to the pavement. The resulting dynamic displacements are sensed with rolling sensor. A description of the RDD and procedures used to analyze RDD data are discussed herein. The results of continuous RDD profiling of rigid pavements are presented. These results show that continuous stiffness profiles of displacement per given load of origin pavements can be used to characterize: 1) the pavement stiffness and its longitudinal variation; 2) the location of transverse cracks and joints; 3) the efficiency of transverse cracks and joints; 4) the efficiency of longitudinal joints; and 5) the lateral variation in average mid-span stiffness. Two significant benefits of continuous RDD profiles which are clearly shown are: 1) softer versus stiffer areas are clearly delineated and 2) the variation in joint efficiency is readily identified.

Paper Details

Date Published: 13 November 1996
PDF: 13 pages
Proc. SPIE 2946, Nondestructive Evaluation of Bridges and Highways, (13 November 1996); doi: 10.1117/12.259132
Show Author Affiliations
James A. Bay, Univ. of Texas/Austin (United States)
Kenneth H. Stokoe, Univ. of Texas/Austin (United States)
W. Ronald Hudson, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2946:
Nondestructive Evaluation of Bridges and Highways
Steven B. Chase, Editor(s)

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