Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders

Volume: 22 Number: 1 March 1, 2018

Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders

Abstract

In this study, an investigation was carried out to elucidate if the core holder type affects the measured Leeb hardness values (HL) of rock materials obtained by using the Equotip hardness tester. To achieve this goal, NX-size core specimens of different rock samples were subjected to Leeb hardness testing by employing an ‘Arch-shaped’ and a ‘V-shaped’ core holder. The results indicated a strong degree of linear correlation (R2  0.95) between mean rebound hardness values determined in the arch-shaped holder (HLA) and V-shaped holder (HLV). The maximum difference in HL values obtained from the two holders was 74.2 units on the HL-scale, corresponding to a difference of 10.2 %. Although the differences in magnitudes of HLA and HLV values were small and varied from one rock variety to another, there was a tendency of the V-shaped holder to give relatively lower values. On the other hand, when compared to the minimum values, a higher statistical correspondence was observed between maximum HLA and HLV values. The results also showed that it is possible to predict uniaxial compressive strength of the tested rocks reliably by employing any of the holders.

Keywords

References

  1. [1] Aydin, A., Basu, A. 2005. The Schmidt hammer in rock material characterization. Engineering Geology 81, 1-14.
  2. [2] Aoki, H., Matsukura, Y. 2007. A new technique for non-destructive field measurement of rock-surface strength: an application of Equotip hardness tester to weathering studies. Earth Surface Processes and Landforms 32, 1759-1769.
  3. [3] Wilhelm, K., Viles, H., Burke, O. 2016. Low impact surface hardness testing (Equotip) on porous surfaces – advances in methodology with implications for rock weathering and stone deterioration research. Earth Surface Processes and Landforms 41, 1027-1038.
  4. [4] Proceq SA. 2007. Equotip 3 portable hardness tester, operating instructions. Switzerland.
  5. [5] Viles, H., Goudie, A., Grab, S., Lalley, J. 2011. The use of the Schmidt hammer and Equotip for rock hardness assessment in geomorphology and heritage science: a comparative analysis. Earth Surface Processes and Landforms 36, 320-333.
  6. [6] Hack, HRGK., Hıngıra, J., Verwaal, W. 1993. Determination of discontinuity wall strength by Equotip and ball rebound tests. International Journal of Rock Mechanics and Mining Sciences & Geomechanical Abstracts 30, 151-155.
  7. [7] Verwaal, W., Mulder, A. 1993. Estimating rock strength with the Equotip hardness tester. International Journal of Rock Mechanics and Mining Sciences & Geomechanical Abstracts 30: 659-662.
  8. [8] Alvarez Grima, M., Babuska, R. 1999. Fuzzy model for the prediction of unconfined compressive strength of rock samples. International Journal of Rock Mechanics and Mining Sciences 36, 339-349.

Details

Primary Language

Turkish

Subjects

-

Journal Section

-

Publication Date

March 1, 2018

Submission Date

May 29, 2017

Acceptance Date

-

Published in Issue

Year 2018 Volume: 22 Number: 1

APA
Güneş Yılmaz, N., & Göktan, R. M. (2018). Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 22(1), 24-31. https://doi.org/10.19113/sdufbed.28343
AMA
1.Güneş Yılmaz N, Göktan RM. Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders. J. Nat. Appl. Sci. 2018;22(1):24-31. doi:10.19113/sdufbed.28343
Chicago
Güneş Yılmaz, Nurdan, and R. Mete Göktan. 2018. “Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders”. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi 22 (1): 24-31. https://doi.org/10.19113/sdufbed.28343.
EndNote
Güneş Yılmaz N, Göktan RM (April 1, 2018) Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi 22 1 24–31.
IEEE
[1]N. Güneş Yılmaz and R. M. Göktan, “Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders”, J. Nat. Appl. Sci., vol. 22, no. 1, pp. 24–31, Apr. 2018, doi: 10.19113/sdufbed.28343.
ISNAD
Güneş Yılmaz, Nurdan - Göktan, R. Mete. “Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders”. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi 22/1 (April 1, 2018): 24-31. https://doi.org/10.19113/sdufbed.28343.
JAMA
1.Güneş Yılmaz N, Göktan RM. Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders. J. Nat. Appl. Sci. 2018;22:24–31.
MLA
Güneş Yılmaz, Nurdan, and R. Mete Göktan. “Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders”. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, vol. 22, no. 1, Apr. 2018, pp. 24-31, doi:10.19113/sdufbed.28343.
Vancouver
1.Nurdan Güneş Yılmaz, R. Mete Göktan. Analysis of the Leeb Hardness Test Data Obtained by Using Two Different Rock Core Holders. J. Nat. Appl. Sci. 2018 Apr. 1;22(1):24-31. doi:10.19113/sdufbed.28343

Cited By

e-ISSN :1308-6529
Linking ISSN (ISSN-L): 1300-7688

All published articles in the journal can be accessed free of charge and are open access under the Creative Commons CC BY-NC (Attribution-NonCommercial) license. All authors and other journal users are deemed to have accepted this situation. Click here to access detailed information about the CC BY-NC license.