Uniaxial Compressive Test On Rock

Uniaxial Compressive Test On Rock

  • Uniaxial Compressive Strength - an overview ...

    Uniaxial compressive strength (UCS) is a key physical test relevant to iron ore crusher design and rock geomechanics for mining. Tests are typically performed on intact lengths of NQ, HQ, or PQ diamond drill core and record the maximum axial load sustained at the point of failure. The International Society for Rock Mechanics (ISRM) standard terminology for UCS is very low (<

  • Suggested Methods for Determining the Uniaxial Compressive ...

    the Uniaxial Compressive Strength and Deformability of Rock Materials PART 1. SUGGESTED METHOD FOR DETERMINATION OF THE UNIAXIAL COMPRESSIVE STRENGTH OF ROCK MATERIALS 1. SCOPE This method of test is intended to measure the uni- axial compressive strength of a rock sample in the form of specimens of regular geometry. The test is mainly

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  • Uniaxial Compression Mechanical Properties of Rock Samples ...

    Through the uniaxial compression test of artificial composite rock samples, the effects of the strength ratio of similar materials and the thickness ratio of higher strength materials on the mechanical properties of composite specimens were analyzed. The results of uniaxial compression test show that artificial similar materials could be used to simulate the composite rock samples which are difficult to

  • Author: Bo Wu, Wei Huang
  • Unconfined Compression Test Geoengineer.org

    Laboratory ProcedureRock Characterization and Typical Range of UCS Based on Rock TypesReferencesSamplingSamples are retrieved by drill cores and are selected cautiously in order be representative of the original rock formation. The minimum diameter of a specimen must be at least 47 millimeters and 10 times larger than the size of the largest mineral grain (or 6 times larger for weaker rocks e.g. sandstones, marlstoneApparatusThe apparatus used to conduct the Unconfined Compression Test consists of the following parts: Loading Device:The loading device must be designed to consistently apply load at the required rate until the end of the test. The test may be stress- or strain-controlled. It is pointed out that only strain-controlled devicTesting ProcedureThe two plates shall be carefully cleaned before the specimen is placed in the testing chamber. The load should be continuously applied at a rate of 0.5 MPa/s to 1.0 MPa/s (in case of a stress-controlled load device) and failure must occur in approximately 10 minutes. Stress and deformation data can be recordSee more on geoengineer.org
  • ASTM D7012 - 14e1 Standard Test Methods for Compressive ...

    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 underground rock masses

  • Testing rock specimen for Uniaxial Compressive Strength ...

    2017-06-11  This test shows how we tested a rock specimen to help determine the appropriate Rock Anchor for this rock type. The specimen was sent to us by Crag Studio, Hyderabad who has taken a major...

  • Author: Gipfel Gear
  • Rock Uniaxial Compression Test and Axial Splitting ...

    2017-01-01  Introduction Axial splitting is a complicated failure mechanism that is normally observed in uniaxial compressive testing of rock. Wawersik and Fairhurst [1] conducted some uniaxial compressive tests and defined local fracturing that is mostly parallel to the specimen axis and both local and macroscopic shear faulting as two possible failure modes. In * Corresponding author. Tel.: +1-575-835-6577

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  • Uniaxial Compression Test - University of Sistan and ...

    Uniaxial compression test is one of the popular test which is done in rock mechanic laboratories. Although this test is very simple, but it’s has many application in rock problems. 2

  • Uniaxial Tension and Compression Testing of Materials

    2013-09-25  uniaxial compression testing (Fig. 2.4). Fig. 2.3 Porous Al 2 O 3, Non-Porous Al 2 O 3, aluminum, brass, steel, copper. Each pair of materials contain samples before (left) and after (right) compression testing. Sample Height (mm) Diameter (mm) Steel 38.05 12.66 Al 6061 38.19 12.75 Cu 38.13 12.76 Brass 38.12 12.68 Table 2.2 Initial gage dimensions (height and diameter, in mm) of the

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  • Unconfined Compressive Strength Test of Rock

    This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D 2938 except that the cores are tested after cutting without grinding, and neoprene caps are used on the specimen ends. Unconfined Compressive Strength Test Procedure Check the ability of the spherical seat ...

  • Uniaxial Compression Mechanical Properties of Rock Samples ...

    The results of uniaxial compression test show that artificial similar materials could be used to simulate the composite rock samples which are difficult to sample. Without considering the structural interface effect, the greater the strength ratio of similar materials, the greater the impact on the overall strength of composite specimens.

  • (PDF) The Uniaxial Compressive Strength of Soft Rock

    Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such...

  • Triaxial Compression Test in Rock Geoengineer.org

    The principal stresses correlation in H-B Criterion is expressed as: where σci is the uniaxial compressive strength, mi is a constant based on the rock type, σ1 and σ3 are the principal stresses.

  • Unconfined Compressive Strength Test of Rock

    This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D 2938 except that the cores are tested after cutting without grinding, and neoprene caps are used on the specimen ends. Unconfined Compressive Strength Test Procedure Check the ability of the spherical seat ...

  • Uniaxial Compression and Indirect Tensile Testing of ...

    through the testing of 54 Uniaxial Compressive Strength (UCS) and 47 Brazilian Tensile Strength (BTS) specimens. The rock for these tests has been collected from St. Mary’s Quarry located in Bowmanville, Ontario. At this site the unit is alternatively referred to as Cobourg or the Lindsay Formation. This rock presents core scale heterogeneity in the form of large (50-75 mm) calcite rich ...

  • Uniaxial Compressive Strength (UCS) test - In situ rock ...

    Uniaxial Compressive Strength (UCS) test. To study the rock failure behaviour, for example the rock spalling potential, the relationship of the UCS, and the ratio of the UCS and the tensile strength will give an estimation of the spalling potential. By comparing the UCS of the rock to rock stresses result in an estimation of the rock mass strength and the factor of safety (FOS) against rock ...

  • Triaxial and Uniaxial Tests Mining SGS

    Unconfined (Uniaxial) Compression Test (UCS) The test determines the unconfined compressive strength of a rock specimen. Drill core specimens with length to diameter ratio greater than 2:1 are cut with a diamond saw to achieve nearly parallel end faces within ± 0.025 mm.

  • THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

    Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content.

  • (PDF) Correlation between uniaxial strength and point load ...

    Uniaxial Compressive Strength (UCS) is one of the most important properties of rocks. Point Load Test (PLT) is practically used in geotechnical engineering to determine rock strength index. Despite...

  • Laboratory Testing and Interpretation of Rock Properties

    The laboratory determination of intact rock strength is accomplished by the following tests: point load index, unconfined compression, triaxial compression, Brazilian test, and direct shear. The uniaxial (or unconfined) compression test provides the general reference value, having a respective analogy with standard tests on concrete cylinders.

  • Triaxial and Uniaxial Tests Mining SGS

    Unconfined (Uniaxial) Compression Test (UCS) The test determines the unconfined compressive strength of a rock specimen. Drill core specimens with length to diameter ratio greater than 2:1 are cut with a diamond saw to achieve nearly parallel end faces within ± 0.025 mm.

  • Uniaxial Compressive Strength (UCS) test - In situ rock ...

    Uniaxial Compressive Strength (UCS) test Uniaxial Compressive Strength (UCS) test To study the rock failure behaviour, for example the rock spalling potential, the relationship of the UCS, and the ratio of the UCS and the tensile strength will give an estimation of the spalling potential.

  • The Uniaxial Compressive Strength of Soft Rock Semantic ...

    Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content. A number of uniaxial compression tests have been conducted onto soft rock samples. The results showed that the strength reduced significantly in ...

  • Uniaxial Compression and Indirect Tensile Testing of ...

    through the testing of 54 Uniaxial Compressive Strength (UCS) and 47 Brazilian Tensile Strength (BTS) specimens. The rock for these tests has been collected from St. Mary’s Quarry located in Bowmanville, Ontario. At this site the unit is alternatively referred to as Cobourg or the Lindsay Formation. This rock presents core scale heterogeneity in the form of large (50-75 mm) calcite rich ...

  • Mechanical Properties and Failure Modes of Rock Specimens ...

    Triaxial compressive testing apparatus. This device (RMT-150C) was designed and manufactured by the Institute of Rock and Soil Mechanics (affiliated to the Chinese Academy of Sciences). It can simulate the loading and the unloading conditions and perform different types of tests (uniaxial test, direct shear test, Brazil disk split test, etc.).

  • Automatic Uniaxial and Triaxial test system, Rock ...

    General description The Automatic configuration for determining the elastic modulus and strength characteristics of rock specimens under uniaxial and triaxial conditions is based on the AUTOMAX Multitest control console for axial load and SERCOMP 7 for confining pressure.

  • THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

    Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content.

  • Loading rate conditions and specimen size effect on ...

    2018-11-09  According to the results obtained from 93 specimens of 5 different types of rock material and 2 different rock-like materials (cement paste and a concrete mix including sand) tested in this study, uniaxial compressive strength (UCS) values were found to significantly decrease with an increase in the specimen size under the condition of a load controlled rate (kN/s) selection.

  • Rock Triaxial Test

    The apparatus for a typical rock triaxial test is shown on the right. A typical specimen is placed in the compression chamber and the axial load piston is brought into contact with the top of the specimen. The compression chamber is filled with liquid, usually a non-conductive fluid such as oil, and is pressurized.

  • POINT LOAD STRENGTH INDEX TEST OF ROCK (IS-8764 ...

    2014-04-28  The axial test is conducted on rock core sample of small length. Minimum of 10 test specimens are required to find out the average value of point load strength index. This test can be conducted on the core specimens which are completely dry or after soaking it for 7 days. Measure the total length (l) and diameter (d) of the core specimen.

  • Uniaxial Compressive Strength (UCS) test - In situ rock ...

    Uniaxial Compressive Strength (UCS) test Uniaxial Compressive Strength (UCS) test To study the rock failure behaviour, for example the rock spalling potential, the relationship of the UCS, and the ratio of the UCS and the tensile strength will give an estimation of the spalling potential.

  • The Uniaxial Compressive Strength of Soft Rock Semantic ...

    Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content. A number of uniaxial compression tests have been conducted onto soft rock samples. The results showed that the strength reduced significantly in ...

  • compressive strength of rock calculation

    Designation: D 4555 – 01 Standard Test Method for Determining Deformability and Strength of Weak Rock by an In Situ Uniaxial Compressive Test1 This standard is issued under the fixed designation D 4555; the number immediately following the designation indicates the year of

  • Measurement Uncertainty in Testing of Uniaxial Compressive ...

    Measurement Uncertainty in Testing of Uniaxial Compressive Strength and Deformability of Rock Samples ... Draft ISRM suggested method for the complete stress-strain curve for intact rock in uniaxial compression. International Society for Rock Mechanics and Mining Sciences, 36, 279-289. American Society for Testing and Materials. (2010). ASTM D7012 - 10 Standard Test Method for Compressive ...

  • Rock uniaxial and triaxial compression tester (MECATEST)

    Rock uniaxial and triaxial compression tester (MECATEST) The servo-controlled MECATEST is a conventional rock compression testing system capable of performing uniaxial and triaxial compression tests on specimens.

  • PAPER OPEN ACCESS Correlation between uniaxial compressive ...

    The uniaxial compressive strength test is the most widely used measure of the strength, deformation and fracture characteristics of the rock because of its accuracy. Many studies have been conducted to show that UCS is related to other physical properties of the rock samples.

  • unconfined compressive strength - Schlumberger Oilfield ...

    A measure of a material’s strength. The unconfined compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand under unconfined conditions—the confining stress is zero.

  • Utilization of the Brazilian test for estimating the ...

    Uniaxial compressive strength The UCS tests were carried out on fresh rock samples with a length-to-diameter ratio of 2.5. The tests were performed using a servo-controlled testing machine with a load capacity of 300 t, using a stress rate of 0.75 MPa/s.

  • The effect of length to diameter ratio of test specimens ...

    2009-07-17  One of the parameters which affect the uniaxial compressive strength (UCS) of rock materials is the length to diameter ratio (L / D) of test cores. ASTM recommends a ratio of between 2 and 2.5, and ISRM suggests 2.5–3:1.

  • Correlation between Uniaxial Compressive Strength and ...

    The mean values of uniaxial compressive strength of the tested rocks are listed in Table 2. The strength values range from a low of 9.16 MPa for Marl to a high of 101.08 MPa for Sakessar Massive Limestone. The coefficient of variation ranges from 10.3 % to 37.7%. 4.2 Point Load Test Results