Evaluation of Concrete Compression TestResults

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Title: Evaluation of Concrete Compression TestResults

Author(s): L. R. Lauer

Publication: Journal Proceedings

Volume: 62

Issue: 4

Appears on pages(s): 467-478

Keywords: coefficient of variation, compressive strength, compression test, cylinder, evaluation, graphical method, mean strength, quality control, ready-mixed concrete, standard deviation

Date: 4/1/1965

Abstract:
A graphical method is applied to the evaluation of actual compression cylinder test results of concrete from a large ready mixed concrete firm for its previous year of operation. These results are then utilized as a basis of design for succeeding jobs supplied by the firm. A graphical representation of data to obtain standard deviation, mean strength, and the coefficient of variation is shown and the results compared with the usual root mean square method of obtaining these values. The graphical method not only allows processing of data within a short time, but it also allows visual detection of deviate results.