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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: Estimating 28-Day Strength of Concrete from Earlier Strengths-Including the Probable Error of the Estimate
Author(s): Jacob J. Creskoff
Publication: Journal Proceedings
Appears on pages(s): 493-512
Abstract:Presents a method for estimating the 28-day strength of concrete from earlier strengths. Using a simple basic formula, its coefficient is adjusted by apply-ing the method of least squares to a small number of data obtained from the mix under consideration. The method is noteworthy because it demonstrates that: only limited data are required for estimating purposes; earlier strengths in weighted combination can be used to estimate 28-dav strenqth with in- creased accuracy; the formula ‘can be computed accurately with a IO-in. slide rule; and, because it presents a criterion for judging accuracy of estimates.
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