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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: Comparison of Four Different Methods of Determining Drying Shrinkage of Concrete Masonry Units
Author(s): J. O. Bryson and David Watstein
Publication: Journal Proceedings
Appears on pages(s): 163-184
Abstract:Four different procedures for determining the drying shrinkage of concrete masonry units were compared to determine their suitability as possible standard test methods. The test procedures differed mainly by the conditions under which the specimens were dried and were designated RT-50 (73 F and 50 percent relative humidity), RT-30 (73 F and 30 percent r e l a t i v e humidity), Modified British (122 F and 17 ‘percent relative humidity), and Rapid (220-935 F). In addition to varying the dryina conditions. The size and shape of test specimens were also varied. The drying-shrinkage test was performed using all four procedures on both autoclaved and low-pressure steam cured block of sand and gravel, cinders, expanded slag, ex-panded shale, and pumice aggregates.
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