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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: A Cooperative Laboratory Study of the Effect ofTesting Environment and Specimen Type ofn Shrinkage of Masonry Unit Concrete
Author(s): ACI Committees 716 and 213
Publication: Journal Proceedings
Appears on pages(s): 1391-1434
Abstract:Shrinkage of concrete masonry units, an important factor in cracking of walls, has commonly been measured on full-size units by methods which may require from 1 to 3 months to complete. ACI Committees 716 and 213 undertook a cooperative test program in 1958 to evaluate three methods-Reference, Modified British, and Rapid-using whole specimens, face shells, and thin, horizontal slices. The major comparisons required 720 specimens from 10 lots of commercially produced block made of Five aggregates by two different curing methods. The Rapid method was adjudged unsatisfactory because of poor correlation with the results of other methods. The Modified British and Reference methods were found to be in substantial agreement in most instances. Face shell specimens cut longitudinally were found to give shrinkages comparable to those for whole block. The use of face shells cut longitudinally and tested by the Modified British method can result in testing economies of both space and time. A statistical analysis is presented.
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