Bonded concrete overlays subjected to differential shrinkage - An analytical model based on localised strain and stress

Title: Bonded concrete overlays subjected to differential shrinkage - An analytical model based on localised strain and stress
Author(s): H-D. Beushausen
Paper category : conference
Book title: International RILEM TC 193-RLS Workshop on Bonded Concrete Overlays
Editor(s): J.L. Granju and J. Silfwerbrand
Print-ISBN: None
e-ISBN: 2912143837
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 41 - 47
Total Pages: 7
Nb references: 7
Language: English

Abstract: The long-term serviceability of bonded concrete overlays is mainly affected by differential shrinkage and the resulting interface shear stress and tensile stress in the overlay. If stresses exceed the strength of the materials, bond failure and/or cracking will follow. Durable overlays can only be properly designed if stresses and strains resulting from differential shrinkage can be modelled accurately. Any analytical model should be easy to apply and based on logic and theory that can be verified through practical research. A model is introduced based on localised strain and stress at the interface between substrate and overlay. Extensive laboratory tests were carried out, measuring strain on composite beam specimens with consideration of a broad range of parameters. The analytical model is strongly supported by the test results and can be used for the estimation of time-dependent overlay crack resistance.

Online publication: 2004-12-20
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143624.006