Title

Investigating the Performance of As-Built and Overlaid Pavements: A Competing Risks Approach

Department

Civil & Construction Engineering

Document Type

Article

Publication Date

7-15-2014

Abstract

Overlay has been a commonly used rehabilitation measure for flexible pavements. Properly designed and constructed overlays restore pavement service conditions and economically extended pavement service lives. In the light of different failure modes that could be experienced by a flexible pavement, such as cracking, rutting and roughness, and complex interactions among them, this paper considers these failure modes as competing risks and evaluates performance differences between overlaid pavements and as-built pavements in terms of hazard function, cause-specific cumulative incidence function and cause-specific conditional cumulative incidence function. A case study was undertaken using the pavement condition survey data in Florida. It was found that the overlaid pavements generally have a higher failure risk compared with the originally built pavements across all failure modes and exhibit three distinct phases of failure hazard change: increasing, stabilising and decreasing. For as-built pavements, the failure hazard increases dramatically after exceeding the design lives of pavements.

Journal

International Journal of Pavement Engineering

Journal ISSN

1477-268X

Volume

16

Issue

3

First Page

191

Last Page

197

Digital Object Identifier (DOI)

10.1080/10298436.2014.937808