Evaluation of empirical methods for measuring the uniaxial compressive strength of rock

Cargill, Jennifer; Shakoor, Abdul

doi:10.1016/0148-9062(90)91001-n

Cited by 249 publications

(74 citation statements)

References 11 publications

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“…The raw data and the resulting fits are plotted in Fig. 9, and the material constants obtained from the strength fits can be seen in (Cargill and Shakoor 1990); Indiana limestone peak m = 5.5 (Ramamurthy 2001)]. …”

Section: Strengthmentioning

confidence: 99%

A Laboratory-Testing-Based Study on the Strength, Deformability, and Dilatancy of Carbonate Rocks at Low Confinement

et al. 2014

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A servo-controlled testing setup was used to investigate the stress-strain behaviour of three carbonate rocks into the post-failure region. A series of uniaxial and triaxial tests on Indiana limestone, Carrara marble, and Toral de Los Vados limestone have been performed, gathering information on the evolution of the strength parameters and stiffness of these rocks, as well as on their post-yield dilatational properties. The Carrara marble was found to be extremely ductile, even under uniaxial conditions, whereas the Indiana limestone and Toral de Los Vados limestone were more brittle. The Indiana limestone, which was the weakest rock tested, showed a notable transition to more ductile failure modes, even at modest confinements on the order of 10 MPa; this transition was reflected in the volumetric strain evolution of the rock in the form of a transition of the dilation angle towards lower, less variable values. All of the rocks tested were found to be consistent with a cohesion-weakening-frictionstrengthening model for yield, with the peak friction angle of both the Carrara marble and Indiana limestone being attained after peak strength. The evolution of stiffness was also considered as a function of accumulated plastic strain. Each rock decreased in stiffness significantly following the onset of yield, and eventually reached a near-constant residual stiffness on the order of 50 % of the initial elastic stiffness.

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Section: Strengthmentioning

confidence: 99%

A Laboratory-Testing-Based Study on the Strength, Deformability, and Dilatancy of Carbonate Rocks at Low Confinement

et al. 2014

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“…The Uniaxial Compressive strength was indirectly measured using the Point load test which was developed as an index test, since the samples appeared to be very broken, at least for the UCS testing method. The Point load test is widely used to determine the uniaxial compressive strength indirectly, because of its ease of testing, simplicity of sample preparation and in some case field application ( [34][35][36][37][38][39][40][41][42][43][44][45]). A correlation factor (k) between UCS and PLT strength of 12.5 has been proposed according to Brook (1980) [46], although, the value of K is disputed by many researchers.…”

Section: Materials Studied and Testing Methodsmentioning

confidence: 99%

Geotechnical and mineralogical properties of weak rocks from Central Greece

et al. 2009

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Thirty bulk samples of hard soils-soft rocks such as marls, originating from Euboea Island and Peloponnesus area, were investigated to evaluate their geotechnical behavior. Specifically, by conducting a series of physical and geotechnical tests, such as liquid limit and plastic limit tests, along with the estimation of the grain size fraction, Slake Durability and Point Load Test. Certain parameters were determined and used for empirical correlations with their mineralogical characteristics. The mineralogical composition was determined by Xray diffraction, thermo-gravimetric and thermal analysis, succeeded by textural analysis performed by Optical Microscope. With the help of the above mentioned tests, we interpreted the observed geotechnical behavior of the examined weak rocks by means of mineralogical composition and texture. Durability and the unconfined compressive strength was found to be influenced by high percentages in carbonate minerals. In addition, it was found that a decrease in clay content resulted in higher strength and durability values. The concluded empirical correlations verified the influence of these parameters and gave a general overview of the engineering behavior of the examined weak rocks.

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“…Apparent and bulk density of the Creatceous limestones from Thermo show moderate to slightly high values and are within the acceptable limits of aggregates suitability (NBG 1985, Shakoor et al 1982, Cargill, 1989. Water absorption is another important factor related to durability of the materials.…”

Section: Discussionmentioning

confidence: 99%

Suitability Assessment of Gretageous Limestones From Thermo (Aitolokarnania, Western Greece) for Their Use as Base and Sub-Base Aggregates in Road-Construction

Mpalatsas¹,

Rigopoulos²,

Tsikouras³

et al. 2017

geosociety

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Evaluation of empirical methods for measuring the uniaxial compressive strength of rock

Cited by 249 publications

References 11 publications

A Laboratory-Testing-Based Study on the Strength, Deformability, and Dilatancy of Carbonate Rocks at Low Confinement

A Laboratory-Testing-Based Study on the Strength, Deformability, and Dilatancy of Carbonate Rocks at Low Confinement

Geotechnical and mineralogical properties of weak rocks from Central Greece

Suitability Assessment of Gretageous Limestones From Thermo (Aitolokarnania, Western Greece) for Their Use as Base and Sub-Base Aggregates in Road-Construction

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