Characterization of LTPP Pavements using Falling Weight Deflectometer

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Title Characterization of LTPP Pavements using Falling Weight Deflectometer
Author Chai, Gary; Kelly, Greg
Publication Title The 6th International Conference on Road and Airfield Pavement Technology 20-23 July 2008
Editor Atsushi Kasahara
Year Published 2008
Place of publication Tokyo, Japan
Publisher Japan Society of Civil Engineers
Abstract In this paper, the characteristics of the falling weight deflectometer (FWD) deflection were studied using a simplified deflection model in the form of Y = K1 exp (-X/K2) + Y0. The exponential curve was found to have the desired characteristics which match the FWD deflection bowls. In the equation, Y is the FWD deflection in microns and X is the radial distance in millimetres. The coefficients K1 and K2 of the model describe the structural characteristics of the pavements. The deflection model has been adopted in assessing the structural characteristics of road pavements in several City and Shire Councils in Southeast Queensland (SEQ). FWD deflection data used in the study are obtained from the 65 long term pavement performance (SEQ-LTPP) sites located within the region. The results indicate that the coefficient K1 and K2 are unique for each of the LTPP section selected in the study. The study suggests that the coefficient K1 is closely related to FWD deflection D0 and K2 is dictated by the strength of the pavement layers. The simplified deflection model developed in the study can be used to delineate the pavements with cement stabilised and natural gravel bases and pavements with poor subgrade.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.jsce-int.org/
Alternative URI http://www.jsce.or.jp/committee/Pavement/icpt2008.html
Copyright Statement Copyright remains with the authors 2008. The attached file is posted here with permission of the copyright owner[s] for your personal use only. No further distribution permitted. For information about this conference please refer to the publisher's website or contact the authors.
Conference name The 6th International Conference on Road and Airfield Pavement Technology
Location Sapporo, Japan
Date From 2008-07-20
Date To 2008-07-23
URI http://hdl.handle.net/10072/23636
Date Accessioned 2009-02-03
Date Available 2009-08-05T06:30:04Z
Language en_AU
Research Centre Centre for Infrastructure Engineering and Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Transport Engineering
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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