Title:
Use of Simultaneous Nondestructive Tests to Predict the Compressive Strength of Concrete
Author(s):
G. V. Teodoru
Publication:
Symposium Paper
Volume:
112
Issue:
Appears on pages(s):
137-152
Keywords:
attenuation; compressive strength; computer programs; impact hammer tests; nondestructive tests; precast concrete; quality control; ultrasonic tests; General
DOI:
10.14359/3715
Date:
1/1/1989
Abstract:
Aim is to analyze the correlations between several nondestructive measured values (ultrasonic velocity and attenuation, rebound number) and the compressive strength of concrete. A computational program performs a step-by-step analysis. First, isolated linear correlations are established for each one of the three nondestructive tests. Then the results are compared with each other in the sense of a general multiple correlation of the values. Since the results obtained from the nondestructive tests are equally scattered, the program determines interactively, in a second step, the multiple coefficients of correlation and restarts the analysis several times by tentatively disregarding the presumably bad experimental results. Since the measured values also comprise a large spectrum of magnitude, limits of validity of the assumed correlations are investigated concomitantly with the process of analysis. A last step is performed to identify a tendency of deviation of the single and multiple correlations from the basic linear ones.