Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
https://orcid.org/0000-0003-0945-0297
Abstract The Leeb hardness test (LHT with test value of LD) is a rebound hardness test, originally developed for metals, that has been correlated with the Unconfined Compressive Strength (test value of σc) of rock by several authors. The tests can be carried out rapidly, conveniently and nondestructively on core and block samples or on rock outcrops. This makes the relatively small LHT device convenient for field tests. The present study compiles test data from literature sources and presents new laboratory testing carried out by the authors to develop a substantially expanded database with wide-ranging rock types. In addition, the number of impacts that should be averaged to comprise a “test result” was revisited along with the issue of test specimen size. Correlation for LD and σc for various rock types is provided along with recommended testing methodology. The accuracy of correlated σc estimates was assessed and reasonable correlations were observed between LD and σc. The study findings show that LHT can be useful particularly for field estimation of σc and offers a significant improvement over the conventional field estimation methods outlined by the ISRM (e.g., hammer blows). This test is rapid and simple, with relatively low equipment costs, and provides a reasonably accurate estimate of σc.
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
https://orcid.org/0000-0003-0945-0297
Abstract The Leeb hardness test (LHT with test value of LD) is a rebound hardness test, originally developed for metals, that has been correlated with the Unconfined Compressive Strength (test value of σc) of rock by several authors. The tests can be carried out rapidly, conveniently and nondestructively on core and block samples or on rock outcrops. This makes the relatively small LHT device convenient for field tests. The present study compiles test data from literature sources and presents new laboratory testing carried out by the authors to develop a substantially expanded database with wide-ranging rock types. In addition, the number of impacts that should be averaged to comprise a “test result” was revisited along with the issue of test specimen size. Correlation for LD and σc for various rock types is provided along with recommended testing methodology. The accuracy of correlated σc estimates was assessed and reasonable correlations were observed between LD and σc. The study findings show that LHT can be useful particularly for field estimation of σc and offers a significant improvement over the conventional field estimation methods outlined by the ISRM (e.g., hammer blows). This test is rapid and simple, with relatively low equipment costs, and provides a reasonably accurate estimate of σc.
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
https://orcid.org/0000-0003-0945-0297
Abstract The Leeb hardness test (LHT with test value of LD) is a rebound hardness test, originally developed for metals, that has been correlated with the Unconfined Compressive Strength (test value of σc) of rock by several authors. The tests can be carried out rapidly, conveniently and nondestructively on core and block samples or on rock outcrops. This makes the relatively small LHT device convenient for field tests. The present study compiles test data from literature sources and presents new laboratory testing carried out by the authors to develop a substantially expanded database with wide-ranging rock types. In addition, the number of impacts that should be averaged to comprise a “test result” was revisited along with the issue of test specimen size. Correlation for LD and σc for various rock types is provided along with recommended testing methodology. The accuracy of correlated σc estimates was assessed and reasonable correlations were observed between LD and σc. The study findings show that LHT can be useful particularly for field estimation of σc and offers a significant improvement over the conventional field estimation methods outlined by the ISRM (e.g., hammer blows). This test is rapid and simple, with relatively low equipment costs, and provides a reasonably accurate estimate of σc.
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
Corkum, A. G. (Autor:in) / Asiri, Y. (Autor:in) / El Naggar, H. (Autor:in) / Kinakin, D. (Autor:in)
2017
Aufsatz (Zeitschrift)
Englisch
Lokalklassifikation TIB:
560/4815/6545
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
| British Library Online Contents | 2018
The Leeb Hardness Test for Rock: An Updated Methodology and UCS Correlation
| Online Contents | 2017
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