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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Behavior of Reinforced Concrete Slabs Strengthened in Flexure by Concrete Overlays
Author(s): J.M. Calixto, E.F. Pires, S.A. Lima,
and E.M. Piancastelli
Publication: Special Publication
Appears on pages(s): 389-406
Keywords: bond; concrete overlays; flexural strengthening; shear connectors; slabs
Abstract:The results of an experimental investigation on the behavior of one-way reinforced concrete slabs strengthened in flexure with a 5-cm concrete overlay are presented. Shear transfer at the concrete interface was provided in two separate ways: bond between the overlay and concrete substrate and dowel action only through shear connectors. Four series of slabs were tested: Series 2 and 3 were strengthened; Series 1 and 4 were cast at one time and had the geometry corresponded to the slabs before and after intervention, respectively. During the experiments, displacements, interlayer slips and strains were measured. The test results indicate expressively the better performance of slabs strengthened with a bonded overlay. A design procedure for evaluating the behavior of both repair procedures in service and at failure is proposed. Good correlation was also achieved.
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