This study reviews the theories and modelling methods for describing interfacial
delamination failure process between two bonded cementitious materials. Complex interfacial stress
conditions at discontinuities and areas of high stress concentrations were primary areas of concern.
Distinct analytical cases involving intrinsic material and structural property variables were
considered. An approach based on plane strain analysis within the context of Interface Cohesive
Zone Model (ICZM) was cited and presented as viable for describing and predicting delamination
mode of failure in bonded concrete overlays systems (BCOs). The study shows that the use of
numerical computational tools is vital in resolving the manifold complexity associated with
interfacial delamination problems. In the concluding analytical model, it is evident that the numerical
values of the delamination failure coefficient(D) and the corresponding Mixed-Mode energy release
rates (G) vary depending on the overlay structural scale, the type of problem (plane stress or plane
strain) and the degree of mismatched properties between the overlay and the substrate.
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The authors gratefully acknowledge the financial support of Aggregate Industries, UK.