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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: Tests on composite structures wutg dufferebt bibd strength in the interface surface
Author(s): Vallés, J.J.
Appears on pages(s): 133 - 141
Abstract:Composite structures are often built up from concretes of different ages and qualities. Composite begavior results in horizontal shearing stresses at the construction joints. Several factors affects the strength of these joints. In this paper, tests involving bond at the interface are presented. The test specimens wre hollow block composite slabs with precast prestressed beams. The types of surface of the precast unit were: -A smooth surface -A rough surface -A powdered surface with cement -A powdered surface with clay The experimental investigations have been carried out on members with ratio of shear-span to depth equal five. Vertical centerline deflection and slip measurements were made after each increment of load. The load-deflection curve shows an apparent loss of compisite action in th specimens with fixed contaminants such as cement and clay. A next study could to stay a comparison betweem theoretically methods for computing deflections and those obtained from tests results.
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