Title: The Evaluation and Acceptance of Concrete Quality by In-Place Testing

Author(s): J.A. Bickley

Publication: Symposium Paper

Volume: 82

Issue:

Appears on pages(s): 95-110

Keywords: acceptability; compressive strength; concretes; form removal; inserts; nondestructive test; post-tensioning; pullout tests; quality control; statistical anlysis.

DOI: 10.14359/6551

Date: 9/1/1984

Abstract:
The standard method of determining the quality of hardened concrete is the cylinder test. Unliess test results fail to meet specified values, and other test procedures are called into play, the standard cylinder test is usually the only quantitative measure of the quality of concrete in a structure. Analysis of test results to ACI 214 enables assessments of this quality to be made. On two large projects in Toronto, horizontal elements were extensively test4d by in-place testing for form removal, termination of shring, and confirmation of specified 28-day strength. Permission to waive standard cylinder testing for these elemnets was obtained from trhe City Building Department. Out of interest the cylinders were made and tested. It is therefore possible to evaluate the quality of the concrete on these projects by both the standard procedure, and by in-place testing. This is addressed in this paper together with a discussion of statistical evaluation of in-place test data.