Compressive Strength of rock The RMR value depends up on the unconfined compressive strength (q u ) of the rock and it can be determined from laboratory compression test on a prepared rock specimen Or otherwise find out the approximate value of compression strength from point load test on intact pieces of drill core Get price

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 INTRODUCTION 2 between strain hardening and softening is called the unconfined compressive strength of Get Price And Support Online Wisconsin Highway Research Program This research was funded through the Wisconsin Highway Research Program by the with dolomite At a given compressive strength Get price

σ c is the unconfined compressive strength of intact rock σ cm unconfined compressive strength of rock mass RMR is rock mass rating GSI geological strength index D factor indicating the degree of disturbance due to blast damage and stress relaxation Get price

The major principal stress is horizontal with a magnitude of 3 4 MPa and the compressive strength of the rock types is 53 MPa for the shale and 71 MPa for the basalt The strength/stress ratio for these two cases is then 53/3 4 = 15 6 and 71/3 4 = 20 9 respectively andGet price

As a result unconfined compressive strength of compacted sample was determined to be 2 16 kg/cm2 Suggested unconfined compressive strength for clay liners in municipal solid waste landfills is minimum 2 kg/cm2 (Daniel and Wu 1993) For that reason waste clay is appropriate for using in landfills in terms of unconfined compressive strength Get price

Start studying Geology 330 Test 1 Learn vocabulary terms and more with flashcards games and other study tools The DIFFERENCE between calcite and dolomite is related to _____ _____ used in engineering classification of rocks can be expressed as the ratio of tangent modulus at 50 percent strength to unconfined compressive strength Get price

In general the compressive load from a dam on to its foundations will not exceed 10 MPa The strength of a rock will depend upon its - Quality The degree of weathering Presence of micro-cracks The strength of a rock mass will depend upon - The number of cracks and joints The nature of their infilling materialGet price

Information includes typical cohesion values average cohesion with relation to unconfined compressive strength correlated cohesion values with soil density consistency and standard penetration test gravel silt sand clay bearing capacity foundations shallow foundations deep foundations square footings circular footings isolated footings strip footings skin friction end bearing depth factor width factor Get price

Kolkata Unconfined Strength Granite Basalt Mpa Basalt vs granite compressive strengthmpact fine crusher for stone moviegote stone impact crusher is applied to fine crushing and general crushing of materials with medium hardness such as limestone clinker furnace clinker hard Get price

Start studying Geology 330 Test 1 Learn vocabulary terms and more with flashcards games and other study tools The DIFFERENCE between calcite and dolomite is related to _____ _____ used in engineering classification of rocks can be expressed as the ratio of tangent modulus at 50 percent strength to unconfined compressive strength Get price

Fig 5 Effect of dolomite limestone fine powder specific surface on cement concrete compression strength at 7 days age When limestone content is optimal (25 % of binder weight) strength gain is higher than in the reference sample (0% additives) by 56 % Get price

Nov 28 2015In addition in this test method the unconfined compressive strength is taken as the maximum load attained per unit area or the load per unit area at 15% axial strain whichever occurs first during the performance of a test Get price

unconfined compressive strength of the intact rock q ui was established by performing unconfined compression strength testing in accordance with ASTM D7012 On an additional 14 samples point load testing was performed and the point load index was Table 2 Geological Strength Index for Jointed Rock (Marinos and Hoek 2000)Get price

Unconfined Compressive Strength Relbia Core I - 90 MPa Core 2 - 125 MPa Mean -lOS MPa (50 mm diameter core approximately 200 mm in length) Pieman (1978) 171 MPa (mean of 18 samples) 91-282 MPa (general range for good quality rock although one sample gave 369 MPa) Pieman (1983) 253 MPa ('Hard' rock - mean of 9 samples)Get price

The UCS of the Sevier and Rome Shale was estimated using Point Load Strength Index (Is50) and Schmidt Hammer Rebound (R) values The Is50 value for Sevier Shale ranged from 0 9 N/mm2 for weathered more fissile shales to 4 67 N/mm2 for more durable Get price

Estimating the uniaxial compressive strength of a volcanic bimrock The uniaxial compressive strength (UCS) is one of the important input parameters used in rock engineering designs of tunnels foundations and slopes the block/matrix strength contrast of each core sample changes depending on the type and amount of andesite blocks The Get price

Unconfined compression strength is one of the most important engineering parameters in rock mechanics it is used to characterize and study the behavior of solid rocks A good correlation between the unconfined compression strength test (UCS) and the point load strength (PLS) can be very useful because it allows for faster and cheaperGet price

Related Documents Softwood and Hardwood - Structural Strength Classes - Strength classes bending stress and mean density of hardwood and softwood Steels - Endurance Limits and Fatigue Stress - Endurance limits and fatigue stress for steels Young's Modulus - Tensile and Yield Strength for common Materials - Young's ModulusGet price

effects of lime on plasticity and compressive strength of representative iowa soils this paper considers the selection of 20 representative iowa soils and the results of laboratory tests to determine the effects of a dolomitic monohydrate lime on the plastic limit and unconfined compressive strength of Get price

ultimate compressive strength of dolomite Defining the Tensile Compressive Shear Torsional and May 19 2006Te nsile Strength The tensile strength is defined as the maximum tensile load a body can withstand before failure divided by its cross sectional area This property is also sometimes referred to Ultimate Tensile Stress or UTS Get price

Unconfined compressive strength Granite 100-250 MPa Basalt 100-300 MPa Quartzite 150-300 MPa Sandstone 20-170 MPa Shale 5-100 MPa Limestone 30-250 MPa Marble 35-60 MPa Slate 100-200 MPa Quartzite 150-300 MPa Concrete 14-42 MPa High strength concrete 70 MPa Steel 250 MPa Wood 5 Get price

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 rockmass = − + σ σ (2 3) There is no fundamental relation between the constants in the failure criterion and the physical characteristics of Get price

The unconfined compressive strength (q u) is the load per unit area at which the cylindrical specimen of a cohesive soil falls in compression q u = P/A Where P= axial load at failure A= corrected area = where is the initial area of the specimen = axial strain = change in length/original length Get price

B Strength of Cubes The Unconfined compressive strength and Compressive strength of microfine cement + 3% sodium silicate slurry is obtained by casting cylindrical cubes and 70*70mm square respectively in accordance with IS 9143 1979 and results are obtained which is shown in table 5 Get price

Nov 05 2013 The dolomitic limestone/dolomite and the limestone unconfined compressive strength is due to the Influence of some rock strength properties on hammer mill unconfined compressive strength of dolomite ? Limestone Dolomite Mobile Crusher - sbmcoalcrusher Get price

Relating compressive strength to porosity Numerous relationships have been developed to estimate C 0 often in conjunction with general rock strength relationships Table 2 lists many of the proposed relations for C 0 some of which are plotted for various rock types in Fig 1 and for sandstones in Fig 2 Get price

Bull Int Assoc Eng Geol 44 27–33 Gokceoglu C Zorlu K (2004) A fuzzy model to predict the unconfined compressive strength and modulus of elasticity of a problematic rock Eng Appl Artif Intell 17 61–72 Goktan RM (1988) Theoretical and practical analysis of rock rippability Ph D Thesis Get price

Example Hoek Brown strength envelope tangent T= c +On tans 10 20 30 40 Normal stress (f MPa Figure 11 8 Plot of results from simulated full scale triaxial tests on a rock mass defined by a uniaxial compressive strength Oci = 85 MPa a Hoek -Brown constant m = 10 and a Geological Strength Index GSI = 45 30 • 20 S10O 0Get price

Compressive strength of limestone heavy industry is specialized in the design manufacture and supply of crushing equipment used in mining industry Dolomite uniaxial pressive strength Pressive strength of lime stone for crusher Pressive strength of lime stone for crusher investigation of mechanical Get price

unconfined compressive strength tests on samples containing 0 1 3 and 5% weight of nano silica as well as 0 2 and 4% weight of lime were conducted and effect of curing time on samples 7 and 28 days of age has been investigated Therefore three samples were made to conduct testing The first set of soil samples without additives Get price

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