SEDL / STP / STP185-EB / STP46845S

Review of Data on Effect of Speed in Mechanical Testing of Concrete

McHenry, Douglas
Director of Development and Senior Development Engineer, Portland Cement Assn., Chicago, Ill.

Shideler, J. J.
Director of Development and Senior Development Engineer, Portland Cement Assn., Chicago, Ill.

Pages: 11    Published: Jan 1956

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Abstract

The paper reviews current specifications on rate of loading of concrete and mortar test specimens and presents data from various sources on the effect of speed of testing on compressive strength, flexural strength, and modulus of elasticity of concrete. In general, higher rates of loading show higher strengths in compression and flexure; modulus of elasticity also appears to increase with loading rate, although most observers have attributed this effect to reduced creep during the test period. An annotated bibliography is included.