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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: Statistical Properties of Techniques for Predicting Concrete Strength and Examples of Their Use
Author(s): John K. Moore and Michael A. Taylor
Publication: Special Publication
Appears on pages(s): 259-284
Keywords: accelerated tests; calibrating; compressive strength; com-puter
programs; quality control; regression analysis; statistical
Abstract:This paper contrasts the statistical properties of two statistical techniques for predicting the ultimate strength of concrete, using data from two preliminary calibration experiments. The techniques are: (1) prediction from the mean early strength by the usual regression line; (2) prediction from a conservative estimate of early strength by a conservative relationship of early strength to ultimate strength. It is shown that the latter method guarantees (for almost all calibration experiments) a, high percentage of conservative predictions of ultimate strength -- as concrete users desire -- and that the former method, which is commonly used, does not. The use of the techniques is illustrated by predictions of 28-day cylinder strength from the strength of cylinders autogenously cured for 48 hours.
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