Title:
Nondestructive Testing - An Evaluation Tool
Author(s):
Robert S. Jenkings
Publication:
Concrete International
Volume:
7
Issue:
2
Appears on pages(s):
22-26
Keywords:
concretes; errors; evaluation; impact ham-mer
tests; nondestructive tests; penetration tests;
ultrasonic tests.
DOI:
Date:
2/1/1985
Abstract:
The use of nondestructive test procedures to evaluate problems or failures of concrete materials can result in a certain amount of uncertainty in determining the in-place strength of the concrete. Although regression data can be analyzed for the best fit correlation, there is a rather large magnitude of uncertainty in the determined strength due to inherent variability in the test procedures. Nondestructive test procedures utilizing reboun hammer testing, penetration testing, or ultrasonic testing may allow a degree of uncertainty as great as 600 to 900 psi (4.1 to 6.2 MPa) in the strength determination.