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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: Concrete Proportioning and Control for the "Skylong"
Author(s): L. R. Lauer and R. J. Rigby
Publication: Journal Proceedings
Appears on pages(s): 897-910
Keywords: coefficient of variation, compressive strength, graphical method, mix, proportioning, quality control, set-retarding admixture, slip forming , standard deviation, tower.
Abstract:Reports on the concrete quality control procedures for the "Skylon Tower" of the Niagara International Centre, Niagara Falls, Ontario, Canada. The procedues use a graphical method to determine mean strength, standard deviation, and coefficient of variation and its application to the mixes used on the project. The graphical method is compared with ACI 214-65. The ready-mixed concrete supplier first established the efficiency of two batching plants which would supply concrete to the project, based on past concrete cylinder compression test results. Two different classes of concrete were used, requiring separate preliminary mix proportioning programs. Plant efficiencies were determined for each concrete section and adjustments made as warranted in succeeding concrete sections to effet maximum economies while maintaining specified performance.
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