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

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 te...

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Bibliographic Details
Published in:Bulletin of engineering geology and the environment 2019-10, Vol.78 (7), p.5467-5482
Main Authors: Tuncay, Ergün, Özcan, Nazlı Tunar, Kalender, Aycan
Format: Article
Language:English
Subjects:
Compression
Compression tests
Compressive strength
Earth and Environmental Science
Earth Sciences
Foundations
Geoecology/Natural Processes
Geoengineering
Geological engineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Laboratory tests
Mechanical properties
Nature Conservation
Original Paper
Rock
Rocks
Tests
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Summary: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.
ISSN:1435-9529
1435-9537
DOI:10.1007/s10064-019-01482-6