Schmidt Rebound Hardness Dependence on the Core-Size: A Correction Model Presented and Tested on Greywacke

Author:

Brabec Marek1ORCID,Krmíček Lukáš23ORCID

Affiliation:

1. Institute of Geotechnics, Faculty of Civil Engineering, Brno University of Technology 1 , Veveří 331/95, CZ-602 00Brno, Czech Republic (Corresponding author), e-mail: marek.brabec.mb@gmail.com , ORCID link for author moved to before name tags https://orcid.org/0000-0002-8515-2374

2. Institute of Geotechnics, Faculty of Civil Engineering, Brno University of Technology 2 , Veveří 331/95, CZ-602 00Brno, Czech Republic

3. Department of Geological Sciences, Faculty of Science, Masaryk University 3 , Kotlářská 267/2, CZ-611 37Brno, Czech Republic , ORCID link for author moved to before name tags https://orcid.org/0000-0003-0943-9776

Abstract

Abstract We determined the effect of the core sample dimensions on the measured values of the Schmidt rebound hardness and proposed a way to correct it to obtain unaffected value. The effect was previously investigated on cubes, where a clear dependence of the rebound hardness on the cube edge was proved. For cylindrical bodies, however, the problem is more complex. In order to determine and verify our model, a set of cylindrical samples was made from greywacke. After applying the correction, an improvement in the mean rebound hardness of the whole set was achieved from 80 to 98.8 % of the unaffected mean rebound value.

Publisher

ASTM International

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