ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 3

Evaluation of Schmidt Hammer Rebound Hardness Test Holders

Gunsallus, KL
Graduate research assistant, professor, and associate professor, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY

Kulhawy, FH
Graduate research assistant, professor, and associate professor, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY

O'Rourke, TD
Graduate research assistant, professor, and associate professor, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY

Abstract

An evaluation is made of three different holders for Schmidt hammer tests on rock core in the laboratory, including steel angle, V-notch, and semicircular groove holders. The differences are small, but it is shown that the V-notch holder gives consistently higher rebound hardness values. It is also easier and more economical to build. These qualities indicate that the V-notch holder would be a better selection for conventional use.

Keywords:
rock mechanics, hardness tests, rock testing, Schmidt hammer, rebound hardness, test holders

Paper ID: GTJ10493J
DOI: 10.1520/GTJ10493J
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