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http://dx.doi.org/10.7855/IJHE.2012.14.5.031

A Study on the Bond-Behavior of Bonded Concrete Overlays  

Kim, Young-Kyu (강릉원주대학교 토목공학과)
Lee, Seung-Woo (강릉원주대학교 토목공학과)
Han, Seung-Hwan (한국도로공사 도로교통연구원)
Publication Information
International Journal of Highway Engineering / v.14, no.5, 2012 , pp. 31-45 More about this Journal
Abstract
PURPOSES: In Korea, rapid maintenance of distressed concrete pavement is required to prevent traffic jam of the highway. Asphalt concrete overlay has been used as a general maintenance method of construction for aged concrete pavement. AC overlay on existing concrete pavements experience various early distresses such as reflection crack, pothole and rutting, due to different physical characteristics between asphalt overlay and existing concrete pavement. Bonded concrete overlay(BCO) is a good alternative since it has advantages that can reduce various distresses during the service life since overlay material has similar properties with existing concrete pavements. Recently, BCO which uses the ultra rapid harding cement has been applied for maintenance of highway. BCO has advantage of structural performance since it does monolithic behave with existing pavement. Therefore, it is important to have a suitable bond strength criteria for securing performance of BCO. Bond strength criteria should be larger than normal tensile stress and horizontal shear stress occurred by traffic and environmental loading at bond interface. Normal tensile stress and horizontal shear stress need to estimated for the establishment of practical bond strength criteria. METHODS: This study aimed to estimate the bond stresses at the interface of BCO using the three dimensional finite element analysis. RESULTS: As a result of this study, major failure mode and maximum bond stress are evaluated through the analysis of normal tensile stress and horizontal shear stress for various traffic and environmental load conditions. CONCLUSIONS: It was known that normal tensile stresses are dominated by environmental loading, and, horizontal shear stresses are dominated by traffic loading. In addition, bond failure occurred by both of normal tensile stresses and horizontal shear stresses; however, normal tensile stresses are predominated over horizontal shear stresses.
Keywords
bonded concrete overlay; traffic load; environmental load; normal tensile stress; horizontal shear stress; bond stress;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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