Pulse Velocity as a Measure of Concrete Compressive Strength


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Title: Pulse Velocity as a Measure of Concrete Compressive Strength

Author(s): V.R. Sturrup, F.J. Vecchio, and H. Caratin

Publication: Special Publication

Volume: 82


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.

Date: 9/1/1984

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.