Title:
Pulse Velocity as a Measure of Concrete Compressive Strength
Author(s):
V.R. Sturrup, F.J. Vecchio, and H. Caratin
Publication:
Symposium Paper
Volume:
82
Issue:
Appears on pages(s):
201-228
Keywords:
admixtures; aggre ates;
cretes; cracking (fracturing 3
compressive strength; con-;
curing; density (mass/volume;
freezing; moisture content; nondestructive tests; temperature;
ultrasonic tests; voids.
DOI:
10.14359/6556
Date:
9/1/1984
Abstract:
Pulse Velocity/Strength relationships can be estab-lished for concrete but they are influenced by many factors. Of particular significance are the proportions and composition of the components, age s curing conditions and moisture content of the concrete. Cement type, air-entrainment and curing temperatures -influence to a lesser degree. Pulse velocity correlates well with strength at early ages but is insensitive to even major increases in strength at later ages. A relationship established at early ages therefore is not applicable as the concrete matures. A rela-tionship determined on sound concrete during its development stage cannot be used to predict the strength of concrete that is deteriorating. Such a relationship should be established on cores from the concrete in question. A relationship established using laboratory-cured specimens, cannot be used with assurance to follow strength development in a structure. A Pulse Velocity Strength relationship can be confused by cracks, voids or other discontinuities in the concrete.