determination uniaxial compressive strength of rocks

  • 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.

  • Uniaxial Compressive Strength an overview

    The uniaxial compressive strength of a rock under static loading often decreases with an increasing temperature at which the rock has been heat-treated before strength testing. This conclusion is drawn from a great number of experiments [1,2,4,8,9,11,17–19].The higher the temperature is, the lower the strength. Some results for uniaxial compressive strength σ c and tensile strength σ t

  • The determination of uniaxial compressive strength from

    Feb 20, 2014· 1. Introduction. The uniaxial compressive strength (UCS) of rock is widely used in various engineering projects performed in rock environment.Although the method is relatively simple, it is time consuming and expensive. It also requires well-prepared rock cores.

  • (PDF) Determination of Uniaxial Compressive Strength of

    The uniaxial compressive strength, elastic modulus, point load strength, Schmidt hammer value, P-wave velocity, density and porosity values of the samples were determined in the laboratory.

  • UNCONFINED COMPRESSIVE STRENGTH OF ROCK SAMPLE (IS

    Aug 11, 2013· Reference IS-9143-1979-Method for the determination of unconfined compressive strength of rock materials Objective The objective of this test is to determine unconfined compressive strength of rock. This test is primarily done to classify the rock on the basis of strength. Apparatus used Name of equipment Capacity Least count/Accuracy Loading Machine 5000 kN 2.5 N Vernier []

  • 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 exist.

  • Estimation of uniaxial compressive strength of rock

    Introduction Uniaxial compressive strength (UCS) is one of the most widely used rock mechanical parameters in rock engineering like design and construction of foundations, tunneling, slope stability investigations, etc. UCS is also the only parameter to assess rock material strength in Rock Mass Rating (RMR) proposed by Bieniawski (1989).

  • 8. STRENGTH OF SOILS AND ROCKS

    For the uniaxial or unconfined compressive strength test a right circular cylinder of the material is compressed between the platens of a testing machine as illustrated in Fig. 8.1. The compressive strength is then defined as the maximum load applied to crush the specimen divided by the cross-sectional area. Rock strength has been found to be

  • USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL

    the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that they estimate, are an indication of intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE

  • STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1

    STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1. INTRODUCTION 2. TESTING OF INTACT ROCK FOR STRENGTH 2.1 Uniaxial Compression 2.2 Point Load Testing 2.3 Uniaxial Tension 2.4 Indirect Tension Tests 2.5 Shear Tests 2.6 Confined Compression Tests (Triaxial Tests) 2.7 Biaxial and Multiaxial Tests 2.8 Other Tests 3. PARAMETERS AFFECTING ROCK STRENGTH 4.

  • STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1

    STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1. INTRODUCTION 2. TESTING OF INTACT ROCK FOR STRENGTH 2.1 Uniaxial Compression 2.2 Point Load Testing 2.3 Uniaxial Tension 2.4 Indirect Tension Tests 2.5 Shear Tests 2.6 Confined Compression Tests (Triaxial Tests) 2.7 Biaxial and Multiaxial Tests 2.8 Other Tests 3. PARAMETERS AFFECTING ROCK STRENGTH 4.

  • UNCONFINED COMPRESSIVE STRENGTH OF ROCK SAMPLE (IS

    Aug 11, 2013· Reference IS-9143-1979-Method for the determination of unconfined compressive strength of rock materials Objective The objective of this test is to determine unconfined compressive strength of rock. This test is primarily done to classify the rock on the basis of strength. Apparatus used Name of equipment Capacity Least count/Accuracy Loading Machine 5000 kN 2.5 N Vernier []

  • Uniaxial compressive strength ( c) and deformation modulus

    Uniaxial compressive strength ( c) and deformation modulus of rocks Average values from tests of intact rock samples Tests of rocks world-wide Scandinavian rocks tested at SINTEF c E E c of tests Number c E c Number ROCK MPa GPa MPa GPa of tests ure Dolomite 86 38 443 8 110 49 443 2

  • Determination of c and φ of rocks from indirect tensile

    (2014). Determination of c and φ of rocks from indirect tensile strength and uniaxial compression tests. International Journal of Geotechnical Engineering: Vol. 8, No. 1, pp. 59-65.

  • Compressive strength Wikipedia

    Compressive strength or compression strength is the capacity of a material or structure to withstand loads tending to reduce size, as opposed to which withstands loads tending to elongate. In other words, compressive strength resists being pushed together, whereas tensile strength resists tension (being pulled apart). In the study of strength of materials, tensile strength, compressive

  • (PDF) Determination of c and Φ of rocks from indirect

    Determination of c and Φ of rocks from indirect tensile strength and uniaxial compression tests Article (PDF Available) in International Journal of Geotechnical Engineering 8(1):59-65 · January

  • Estimating Rock Mass Strength BM 1997 02

    The uniaxial compressive strength for the rock mass, σc, rockmass,can be expressed by setting σ3 = 0 in Equation 2.1 thus obtaining σc, rockmass =σc s . (2.2) The uniaxial tensile strength of the rockmass, σt, rockmass,can be found by setting σ1 = 0 in Equation 2.1, thus yielding c (m m s) t 4 2 2, rockmass = − + σ σ . (2.3)

  • UNIAXIAL COMPRESSIVE STRENGTH OF MALAYSIAN

    rock samples used in this study were collected from Bukit Rahman Putra Sungai Buloh. The granite rocks samples were classified based on Grades II, III and IV. In order to study the effects of cyclic loading on the uniaxial compressive strength of weathered granites, two testing were selected namely uniaxial compression strength test,

  • USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL

    the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that they estimate, are an indication of intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE

  • Rock mass properties Rocscience Inc.

    determine the uniaxial compressive strength V ci and the Hoek-Brown constant m i as described by Hoek and Brown (1980a). In this analysis, equation (5) is re-written in the form: (6) where ' x V 3 and ' 2 y (1 3) For n specimens the uniaxial compressive strength,the constant and the coefficient of determination 2 r are calculated from: n x x

  • Estimating Uniaxial Compressive Strength of Tropically

    Uniaxial compressive strength (UCS) of intact rock is particularly important in rock mechanic studies, especially for those involving civil and mining projects. However, the determination of UCS using direct test is generally expensive, time consuming and almost impossible in preparation of samples for highly weathered sedimentary rocks.

  • Uniaxial Compression Test

    Uniaxial Compressive Strength Standard index property (q u =σσσu = σσσσc) Analogous tests in concrete and soil (unconfined compression test). ASTM 4543. ISRM 1979, Suggested methods for determining the uniaxial compressive strength and deformability of rock materials. Int J Rock Mech Min Sci Geomech Abs 16(2), sid 135-140.

  • Estimating thestrength ofrock materials

    1.12.1952 rock sample Uniaxial compressive strength 72 2277 6597 2,89 Uniaxial tensile strength 12 249 316 1,27 DETERMINATION OF THE UNIAXIAL COMPRESSIVE STRENGTH Theuniaxial compressive strength ofrock materials isrelatively easy todetermine, and standardized test

  • The strength of hard-rock pillars Rocscience Inc.

    istics of the rock mass, and s ci is the uniaxial compressive strength of the intact rock pieces. For hard-rock masses, Hoek and Brown [15] recommend a value of 0.5 for a. In order to use the Hoek2Brown criterion for estimating the strength and deformability of jointed rock masses, ‘‘three properties’’ of the rock mass have to be estimated.

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