Title: Minimum Strength Specifications Can Be Practical

Author(s): William A. Cordon

Publication: Journal Proceedings

Volume: 66

Issue: 7

Appears on pages(s): 539-544

Keywords: compressive strength; concretes; quality control; specifications; probability theory.

DOI: 10.14359/7379

Date: 7/1/1969

Abstract:
Controversy regarding the adequa of concrete structures based on the strength of a concrete cylinder tends to undermine the concrete industry. The owner should have complete assurance that his building is structurally sound. Because of normal variations, the contractor and concrete producer cannot, under common specifications, produce concrete without low strength tests. This paper discusses this problem and shows that the probability of a "minimum strength" can be practical when specifications are realistic and when concrete production is uniform.