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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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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: Shear transfer across new and existing concrete interfaces
Author(s): Robert A. Bass, Ramon L. Carrasquillo, and James O. Jirsa
Publication: Structural Journal
Appears on pages(s): 383-393
Keywords: concretes; dowels; epoxy resins; friction; grouting; repairs; shear strength; strengthening; Structural Research
Abstract:An experimental program was designed to provide information on the interface shear capacities between new concrete cast against an existing concrete surface. Thirty-three full-scale, pushoff specimens were designed, constructed, and tested. Test variables included surface preparation, amount and depth of embedment of the interface reinforcement, reinforcement details in the new and existing concrete elements, and the compressive strength of both new and existing concrete elements. Testing consisted of repeated load cycles producing shear stresses along the plane of the concrete interface. Deflections along and across the concrete interfaces at several locations were measured. Peak strength, degradation of strength with repeated load cycles, and increasing deflections were observed. Special attention was given to determining the failure mechanism along the interface.
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