An approach to predict the length-to-diameter ratio of a rock core specimen for uniaxial compression tests

Tuncay E., Özcan N., Kalender A.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, cilt.78, sa.7, ss.5467-5482, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 78 Sayı: 7
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s10064-019-01482-6
  • Dergi Adı: BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5467-5482
  • Anahtar Kelimeler: Classification, Correction equation, Length-to-diameter ratio, Shape effect, Uniaxial compressive strength, STRENGTH, SIZE
  • Hacettepe Üniversitesi Adresli: Evet

Özet

This study aimed to evaluate the effect of length-to-diameter ratio (L/D) of a rock core specimen on uniaxial compressive strength (UCS) and to investigate the optimum L/D range for different rock types. For this purpose, a considerable amount of rock block was compiled and a series of laboratory tests were carried out to determine some geo-mechanical properties of the rocks and the UCS values of test specimens having different L/Ds. Some assessments were made on the limit L/Ds [(L/D)(lim)] based on theoretically calculated values and those experimentally observed, and then some easily determined properties of the studied rocks were statistically evaluated to predict (L/D)(lim) values. By considering the results of these evaluations, some L/D classes were suggested for selection of the L/D intervals of rock specimens before uniaxial compression tests. In addition, an equation was proposed to correct the UCS values obtained from core specimens shorter than lower limits of the suggested L/D classes.