Journal of Applied Science and Engineering

Published by Tamkang University Press

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1.60

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Ying-Haur Lee This email address is being protected from spambots. You need JavaScript enabled to view it.1, Hsiang-Wei Ker2 , Chia-Huei Lin1 and Pei-Hwa Wu1

1Department of Civil Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
2Department of International Trade, Chihlee Institute of Technology, Panchiao, Taiwan 220, R.O.C.


 

Received: June 24, 2008
Accepted: May 6, 2009
Publication Date: June 1, 2010

Download Citation: ||https://doi.org/10.6180/jase.2010.13.2.04  


ABSTRACT


The main objective of this study was to investigate the fundamental principles of flexible and rigid pavement backcalculation methodologies and their potential limitations. The two-layer backcalculation approach proposed by the 1993 AASHTO Design Guide for the structural evaluation of existing pavements was also adopted. The laboratory tested (or static) layer moduli were compared with the backcalculated (or dynamic) moduli using the Long-Term Pavement Performance (LTPP) database. Relatively high variability between the relationships of the static and the dynamic moduli was observed indicating that further research study is needed to improve the current state-of-the-art backcalculation approach. In addition, it was also found that slab thickness did have significant effects on the relationship of the backcalculated subgrade elastic modulus and the backcalculated modulus of subgrade reaction. Subsequently, a revised regression model was proposed for future practical applications.


Keywords: Pavement, Backcalculation, Elastic Modulus, LTPP


REFERENCES


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