Evaluation of the design of bonded whitetoppings based on performance data at the mnroad research facility

Feng Mu, Julie M. Vandenbossche, Manik Barman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The objective of this study is to review the existing bonded whitetopping design procedures and evaluate their efficiency using field data in order to provide useful recommendations for the development of a new design procedure. In total, four design methods are reviewed and evaluated, namely the Colorado Department of Transportation (CDOT) method, New Jersey Department of Transportation (NJDOT) method, Portland Cement Association (PCA) method and Illinois Centre for Transportation (ICT) method. The performance data for the bonded whitetopping sections constructed at the MnROAD Research Facility was used to perform an extensive evaluation of each of these design procedures. These sections provide a broad range of overlay designs so that a comprehensive evaluation could be performed. The performance of the NJDOT, the ICT, the PCA and the CDOT methods were evaluated using field observations at MnROAD. None of the methods yields perfect predictions for the fatigue development of the MnROAD overlay designs. The PCA and the CDOT methods seem to be able to yield the most reasonable predictions of the fatigue In the overlay. This might be due to the fact that these procedures allow for consideration of partial bonding, although no model is currently available for characterizing debonding at the interface. Future work in this area is greatly needed since debonding is the primary factor contributing to the failure of the overlay. During the evaluation, it was also identified that the stiffness of the asphalt layer has a significant impact on the accumulation of damage within the overlay. It was concluded that the variation in the stiffness of the asphalt layer with changing temperatures has a significant impact on the life of the overlay and must be considered to accurately predict the performance.

Original languageEnglish (US)
Title of host publicationInternational Conference on Concrete Pavement Design, Construction and Rehabilitation
Pages62-70
Number of pages9
StatePublished - Dec 1 2011
EventInternational Conference on Concrete Pavement Design, Construction and Rehabilitation 2011 - Xi'an, China
Duration: Apr 19 2011Apr 20 2011

Publication series

NameInternational Conference on Concrete Pavement Design, Construction and Rehabilitation

Other

OtherInternational Conference on Concrete Pavement Design, Construction and Rehabilitation 2011
CountryChina
CityXi'an
Period4/19/114/20/11

Keywords

  • Evaluation of whitetopping design
  • ICT
  • Interface debonding
  • MnROAD whitetopping data
  • NJDOT
  • PCA and CODT methods
  • Temperature dependence of asphalt stiffness

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