The effect of length to diameter ratio of test specimens on the uniaxial compressive strength of rock

Tuncay, Ergün; Hasançebi, Nilsun

doi:10.1007/s10064-009-0227-9

Cited by 95 publications

(30 citation statements)

References 5 publications

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“…We compared the slenderness effect results of this study with other numerical and experimental results for rock specimens [41][42][43], of which deformability had a reverse evolution trend. We speculated that the reason may lie on the tortuosity.…”

Section: Discussionmentioning

confidence: 90%

“…Further research on other types of tests will be reported elsewhere. The size effect of the specimens on uniaxial compression process has been investigated extensively in other geotechnical materials such as rock [40][41][42][43], jointed rock mass [44], and concrete [45]. Those researches provide useful datasets for comparison with our study.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Investigation of scale effect of numerical unconfined compression strengths of virtual colluvial–deluvial soil–rock mixture

Zhang

Tang

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 98%

Investigation of scale effect of numerical unconfined compression strengths of virtual colluvial–deluvial soil–rock mixture

Zhang

Tang

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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“…Ten volcanic specimens (1 riolite, 2 diabase, 1 andesitic basalt, 1 andesite and 5 basalt) were collected from different locations of volcanic area in the Armutlu Peninsula. The specimens used for the investigation are 54 mm diameter and 110 mm long cylindrical samples, which would be acceptable for ASTM [7÷10], or ISRM [11,12]. In the preparation of the specimens, special care was taken to ensure parallel ends and perpendicular to the longitudinal axis.…”

Section: Geological Settingmentioning

confidence: 99%

Evaluation of mechanical and engineering properties of volcanic rocks

Canbay

Ramazanoglu

2016

Teh. vjesn.

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Original scientific paper In order to determine the mechanical and engineering properties of volcanic rocks located in the Armutlu Peninsula, ten samples were collected from various locations in the investigation area and subjected to laboratory tests. Their uniaxial compressive strength (UCS), point load strength Is(50), ultrasonic pulse velocity (UPV) and density (d) were determined. Later statistical correlations were conducted by regression analysis to evaluate relationships between UPV and UCS, Is(50) and (d). The engineering properties of core samples such as brittleness (B), fracture toughness (FT) and drillability index (DI), were determined using UCS. The hardness (Schmidt's Rebound Number) was determined using Schmidt hammer and correlated with UPV. In addition, the abrasion loss of the volcanic samples was determined. Very significant relations were obtained between UPV and mechanical and engineering properties of the volcanic rocks. Seismic refraction and resistivity methods were applied to figure out the dynamic properties of volcanic rocks. Keywords: mechanical i physical properties; seismic; volcanic rocks Procjena mehaničkih i tehničkih svojstava vulkanskih stijenaIzvorni znanstveni članak Kako bi se odredila mehanička i tehnička svojstva vulkanskih stijena u poluotoku Armutlu, prikupljeno je deset uzoraka s raznih lokacija na istraživanom području i laboratorijski ispitivano. Određena je njihova jednoosna tlačna čvrstoća (UCS), čvrstoća u točki opterećenja Is(50), ultrazvučna brzina impulsa (UPV) i gustoća (d). Kasnije su statističke korelacije provedene regresijskom analizom kako bi se odredili odnosi između UPV i UCS, Is(50) i (d). Tehnička svojstva kao što su lomljivost (B), lomna žilavost (FT) te indeks bušenja (DI) određeni su primjenom UCS. Tvrdoća (Schmidt's Rebound Number) je određena pomoću Schmidt čekića i dovedena u korelaciju s UPV. Pored toga određen je gubitak zbog abrazije uzoraka vulkanske stijene. Dobiveni su vrlo značajni odnosi između UPV te mehaničkih i tehničkih svojstava vulkanskih stijena. Primijenjene su metode seizmičke refrakcije i otpornosti da bi se izračunala dinamička svojstva vulkanskih stijena.

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“…According to ASTM D7012-13 [28], L/D needs to be between 2.0:1 and 2.5:1 and specimens with L/D less than 2.0:1 are unacceptable. According to other researchers [39,40], specimens with L/D less than 2.0:1 exhibit larger strength compared to specimens with L/D equal to 2.0:1. Despite the small L/D of the specimens, they were utilized since longer specimens could not be obtained.…”

Section: Comparison Between Shear Strength At Room Temperature and 20mentioning

confidence: 99%

Influence of High Pressure and Temperature on the Mechanical Behavior and Permeability of a Fractured Coal

Kasani

Chalaturnyk

2017

Energies

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Understanding mechanical behavior and permeability of coal at ambient and high temperature is key in optimizing high-temperature in-situ processes such as underground coal gasification. The main objectives of this study were to characterize thermal deformation, stress-strain behavior, and gas permeability of coal samples acquired from the Genesee coal mine in Central Alberta, Canada under various temperatures and confining stresses. These measurements were conducted in a high-pressure high-temperature triaxial apparatus. Initial thermal expansion of the coal was followed by contraction in both axial and lateral directions at about 140 • C. This temperature corresponds to occurrence of pyrolysis in the coal. All specimens showed brittle behavior during shear while forming complex shear planes. The specimens exhibited compressional volumetric strain responses at all temperatures. Deformation localization initiated at various stage during shearing. Specimens sheared at 200 • C showed higher peak stresses and larger axial strains compared to those tested at room temperature (24 • C). Fluctuations of permeability were observed with confining stress and temperature. Permeability dropped at 80 • C due to thermal expansion of coal and closure of initial fractures; however, it increased at 140 and 200 • C due to a combined response of thermal expansion and pyrolysis. Small axial strain during shear was observed to reduce permeability.

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The effect of length to diameter ratio of test specimens on the uniaxial compressive strength of rock

Cited by 95 publications

References 5 publications

Investigation of scale effect of numerical unconfined compression strengths of virtual colluvial–deluvial soil–rock mixture

Investigation of scale effect of numerical unconfined compression strengths of virtual colluvial–deluvial soil–rock mixture

Evaluation of mechanical and engineering properties of volcanic rocks

Influence of High Pressure and Temperature on the Mechanical Behavior and Permeability of a Fractured Coal

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