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To determine the uniaxial compressive strength of rock (qu = Fu = FC). In this test, cylindrical rock specimens are tested in compression without lateral confinement. The test procedure is similar …
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In this study, the tensile strength of coalcrete was regarded as 0.3 times that of UCS [49], which is different from the one-tenth of the compressive strength of rock materials [50]. e value of ...
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Intact rock strength . The uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part. It is determined in accordance with the standard laboratory procedures. For the purpose of rock mass classification, the use of the well -known point load strength index can be useful as the
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Uniaxial compressive strength test. Cylindrical core samples with diameters ranging between 47.35 and 66.40 mm were prepared using an automatic double-blade rock-core cutting machine (SCQ-4 A ...
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The compressive strength of the rock sample can be evaluated from Equation (9.37), where the mean of failure load is equal to: ... Compressive strength is measured by applying an increasing stress to a rock sample, typically a cylinder of rock drilled from a core; ...
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Definition of uniaxial compressive strength of a rock mass The Generalized Hoek-Brown criterion is written as a ci ci m b s = + + s s s s s ' ' ' 3 1 3 (1) where s1 ' and s3 ' are the major and minor principal stresses respectively. sci is the uniaxial compressive strength of the intact rock pieces
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5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. …
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5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most …
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1.1. This method of test is intended for use in determining the uniaxial compressive strength of rock core samples collected from Agency projects. 2. REFERENCE DOCUMENTS 2.1. ASTM D7012 - 10 Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures. 2.2.
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1.1 This test method covers the determination of the strength of intact rock core specimens in uniaxial compression and confined compression. The tests provide data in determining the strength of rock, namely: the uniaxial strength, shear strengths at varying pressures and varying temperatures, angle of internal friction, (angle of shearing resistance), and cohesion intercept.
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Uniaxial compressive strength (UCS) is an important mechanical parameter for rock classification, rock mass engineering design and rock mass stability analysis, and it can also be used to assess rock material strength in Rock Mass Rating (RMR). 1 Conventionally, the UCS of rocks can be determined by the uniaxial compressive tests, as suggested by the International …
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The Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed …
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1.1.1 This standard replaces and combines the following Standard Test Methods for: D 2664 Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements; D 5407 Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements; D 2938 Unconfined Compressive …
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This method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D …
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1.2.3 Method C: Uniaxial Compressive Strength of Intact Rock Core Specimens. 1.2.4 Method D: Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression. 1.2.5 Option A: Elevated Temperatures. Document History. ASTM D7012-23. June 15, 2023
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Rock Mech Rock Eng (2013) 46:199–206 DOI 10.1007/s00603-012-0230-5 TECHNICAL NOTE Statistical Method for Assessing the Uniaxial Compressive Strength of Carbonate Rock by Schmidt Hammer Tests Performed on Core Samples G. Bruno • G. Vessia • L. Bobbo Received: 5 September 2011 / Accepted: 12 February 2012 / Published online: 6 March 2012 Ó ...
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1.1 These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compres-sive …
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Designation: D 7012 – 04 Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures1 This standard is issued under the fixed designation D 7012; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
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Calculation of Compressive Strength of Concrete Core Calculate the compressive test of the specimen using the computed cross sectional area based on average diameter of the specimen. If the L/D ratio is 1.75 or less, correct the result obtained by multiplying with correction factors as given below: L/D Ratio: Correction Factor: 1.75:
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1.1.3 The original four standards are now referred to as Methods in this standard as follows: Method A (D2664) Triaxial Compressive Strength of Undarined Rock Core Specimens Without Pore Pressure Measurements; Method B (D5407) Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements, Method C ...
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Measurements; D2938 Unconfined Compressive Strength of Intact Rock Core Specimens; and D3148 Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression. The original four standards are now referred to as Methods in this standard. 1.5.1 Method A: Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Mea ...
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Standard Method of Test for Triaxial Compressive Strength of Undrained Rock Core Specimens without Pore Pressure Measurements A description is not available for this item. AASHTO T 226. January 1, 1990 Standard Method of Test for Triaxial Compressive Strength of Undrained Rock Core Specimens without Pore Pressure Measurements ...
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if a rock mass is cut by directional joint sets, the rock mass strength is anisotropic. Rock mass strength is scale dependent and varies with the volume of rock under consideration. The …
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1.1 These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial …
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AASHTO T226 – Standard Method of Test for Triaxial Compressive Strength of Undrained Rock Core Specimens without Pore Pressure Measurements. Scope. This test method covers the determination of the strength of cylindrical rock specimens in an undrained state under triaxial compression loading.
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The uniaxial compressive strength is the value of compressive stress at which the specimen fails. The compressive strength is usually obtained by compression testing machine. This test is usually conducted in straight circular cylindrical having height to diameter ratio of 2.0 3.0 and diameter preferably of not less than NX core size (approx. 54 -
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1.1 To establish a procedure for testing the unconfined compressive strength of rock core specimens. 2.0 SCOPE 2.1 This procedure shall apply to nominal 2-inch (51 mm) diameter rock core specimens obtained for the purpose of determining the uniaxial compressive strength of rock. 2.2 This procedure will specify the requirements for the apparatus ...
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The uniaxial compressive strength (UCS) of rock is one of the key parameters determining the mechanical behavior and failure characteristics of rocks under ... Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures. ASTM International, West Conshohocken, PA ...
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International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1990. Eight sandstones, three limestones, one dolomite, one marble and one syenitic gneiss were tested to evaluate the correlations between the compressive strength values, as determined by the standard uniaxial compression test, and the corresponding results of the point load, the …
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The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering. In particular, the rock UCS should be obtained rapidly for underground ...
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