A Method for Predicting Concrete Strengths With Increased Precision

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Title: A Method for Predicting Concrete Strengths With Increased Precision

Author(s): Herbert J. Gilkey

Publication: Journal Proceedings

Volume: 24

Issue: 2

Appears on pages(s): 149-176

Keywords: none

Date: 2/1/1928

Abstract:
While great progress has been made in the pre-determination of concrete strengths, even the most optimistic friend of concrete must concede, in his sober moments, that our very carefully aimed shots are still prone to fall rather wide of the mark. In the majority of cases, the great achievement thus far has been the fairly certain setting of a minimum strength for the concrete to be used in our structures. We have felt satisfied, or even pleased, if the job samples proved to be 20, 50, or even 100 per cent stronger than the pre-selected strength for which the mixture was designed. This is a very natural feeling but it is more that of the layman than of the engineer, whose function it is to build safely upon the one hand and economically upon the other.