The effect of non-standard loading platen usage on point load index value of rocks

Akbay D., Altındağ R.

Journal of the Southern African Institute of Mining and Metallurgy, cilt.121, sa.11, ss.565-572, 2021 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 121 Sayı: 11
  • Basım Tarihi: 2021
  • Dergi Adı: Journal of the Southern African Institute of Mining and Metallurgy
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.565-572
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

The point load index is a simple, fast, and inexpensive method for determining rock strength and

can be applied both in the field and in the laboratory. There are, however, some disadvantages and

limitations to the method, and the test results can be affected by the person carrying out the test, the

rock characteristics, or the test device. In this study we describe an investigation into how the point

load index value is affected by the shape of the conical platens used in the test. Point load index tests

were carried out using different devices fitted with conical platens of different spherical radii, and on a

modified device which circumvented the limitations/disadvantages. It was seen that the point load index

value increased as the platen radius increased, as expected. In the case of testing using non-standard

conical platens, an equation is proposed to normalize the point load index value with respect to the

standard spherical radius value.