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uniaxial compressive strength of granite

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 ...

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Experimental investigation of the uniaxial compressive ...

27/10/2020  Uniaxial compressive strength is a fundamental parameter representing the mechanical properties of brittle materials such as concrete and granite. The primary objective of this study was the definition of a complete stress–strain diagram of granite. Four groups of granite cylinders with various dimensions were manufactured and tested compressively in a fatigue machine. The characterization ...

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Crack initiation of granite under uniaxial compression ...

01/06/2020  The strength ratio γ defined as the uniaxial compressive strength (UCS, ... was used to perform uniaxial compression tests on granite samples. Axial extensometer and circumferential strain gages were used to measure the axial and circumferential strains, respectively. Eleven piezoelectric transducers (PZTs) that have a flat frequency response characteristic from 125 kHz to 950 kHz are

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Crack initiation of granite under uniaxial compression ...

03/09/2020  The strength ratio γ defined as the uniaxial compressive strength (UCS, σc) to the tensile strength ranges from 2.7 to 39 for different rock types (Sheorey, 1997). It can be divided into two parts, i.e. γ = (σci/σt) (σc/σci), in which σci/σt denotes the initiation item and is derived from the crack model, and σc/σci is the propagation item and determined by rock heterogeneity (Cai ...

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Dynamic uniaxial compression tests on a granite —

Dynamic uniaxial compression tests for the Bukit Timah granite in Singapore were conducted at four loading rates (10 0, 10 1, 10 3 and 10 5 MPa/s). It was found that the compressive strength increases from 205 MPa to 235 MPa with loading rate increasing from 10 0 to 10 5 MPa/s. Evidence also indicates that there are small changes in the Young's modulus and the Poisson's ratio of the granite ...

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The influences of heating and uniaxial loading on granite ...

20/06/2020  Before uniaxial compression test, all the granite samples were placed into a drying oven and dried at 45 °C for 48 h until the weight difference between two successive measurements was less than 0.1%, and then they were taken out from the drying oven to recover to room temperature naturally. The uniaxial compression test was carried out using RMT-301 rock and concrete mechanical testing ...

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Uniaxial compressive strength ( c) and deformation modulus ...

Uniaxial compressive strength ( c), E-modulus and the factor m i in the Hoek-Brown failure criterion for rock masses Average values from tests Tests of rocks world of intact rock samples -wide* Scandinavian rocks tested at SINTEF / NTNU *** Rating of the factor m i ** c E E c Number of tests c E E c Number ROCK MPa GPa MPa GPa of tests ure Dolomite 86 38 443 8 110 49 443 2 10.1 Limestone 107 ...

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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 ...

More

Dynamic uniaxial compression tests on a granite —

Dynamic uniaxial compression tests for the Bukit Timah granite in Singapore were conducted at four loading rates (10 0, 10 1, 10 3 and 10 5 MPa/s). It was found that the compressive strength increases from 205 MPa to 235 MPa with loading rate increasing from 10 0 to 10 5 MPa/s. Evidence also indicates that there are small changes in the Young's modulus and the Poisson's ratio of the granite ...

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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.

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Crack initiation of granite under uniaxial compression ...

03/09/2020  The strength ratio γ defined as the uniaxial compressive strength (UCS, σc) to the tensile strength ranges from 2.7 to 39 for different rock types (Sheorey, 1997). It can be divided into two parts, i.e. γ = (σci/σt) (σc/σci), in which σci/σt denotes the initiation item and is derived from the crack model, and σc/σci is the propagation item and determined by rock heterogeneity (Cai ...

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Uniaxial compressive strength of Westerly granite?

Strength criterion for rocks under compressive-tensile stresses and its application, Journal of Rock Mechanics and Geotechnical Engineering, Volume 7, Issue 4, August 2015, Pages 434-439, https ...

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Thermal effects on failure characteristics of granite with ...

17/12/2019  (2017) proposed that the compressive strength of granite slowly decreases below 400°C and then decreases rapidly, ... Fissures have a great influence on the strength of granite in a uniaxial compression test. It is obvious that the compressive stress exhibits an approximately linear upward relation with increasing α in the range from 30 to 60° (as shown in Figure 3). However, previous ...

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Crack initiation of granite under uniaxial compression ...

For granite samples, it shows that the ratio of CI stress to peak strength estimated by SBM ranges from 0.4 to 0.55, and 0.49 e 0.6 by WTM, which are higher than that of AEM (0.38 e 0.46).

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Uniaxial compressive strength ( c) and deformation modulus ...

Uniaxial compressive strength ( c), E-modulus and the factor m i in the Hoek-Brown failure criterion for rock masses Average values from tests Tests of rocks world of intact rock samples -wide* Scandinavian rocks tested at SINTEF / NTNU *** Rating of the factor m i ** c E E c Number of tests c E E c Number ROCK MPa GPa MPa GPa of tests ure Dolomite 86 38 443 8 110 49 443 2 10.1 Limestone 107 ...

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compressive Strength Of Black granite Rock

The strength values are comparable to determinations of uniaxial compressive strength tests of Westerly granite, which range from 130 MPa to 210 MPa (Heard and others, 1974). The slopes of best-fitting lines to the elastic portions of the stress-strain data from the strength experiments were taken for the values of Young's modulus.

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Unconfined Compression Test Geoengineer

Uniaxial Compressive Strength (MPa) Granite. 100-250. Diorite. 150-300. Diabase. 100-350. Gabbro. 150-300. Basalt. 100-300. Gneiss. 50-200. Marble. 100-250. Slate. 100-200. Quartzite. 150-300. Sandstone. 20-170. Shale. 5-100. Limestone. 30-250. Dolomite. 30-250. Table 2: Typical values of Uniaxial Compressive Strength for a various number of rocks (from Attewell Farmer 1976).

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Uniaxial compressive strength of Westerly granite?

Strength criterion for rocks under compressive-tensile stresses and its application, Journal of Rock Mechanics and Geotechnical Engineering, Volume 7, Issue 4, August 2015, Pages 434-439, https ...

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Study on the dynamic uniaxial compressive strength of

Study on the dynamic uniaxial compressive strength of granite . By HB Li, J Zhao, TJ Li and JR Li. Year: 2008. OAI identifier: oai:infoscience.tind.io:130111 Provided by: Infoscience - École polytechnique fédérale de Lausanne. Download PDF: ...

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Crack initiation of granite under uniaxial compression ...

For granite samples, it shows that the ratio of CI stress to peak strength estimated by SBM ranges from 0.4 to 0.55, and 0.49 e 0.6 by WTM, which are higher than that of AEM (0.38 e 0.46).

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Simulation Study on Strength and Failure Characteristics ...

Thus, the uniaxial compressive strength at of 45° is larger than that at of 60°. The influences of and on the uniaxial compressive strength are summarized in Figure 7. Generally, when and are all between 30° and 60°, the uniaxial compressive strength of the granite specimen is generally small.

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uniaxial compressive strength of granite

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. Uniaxial compressive strength of Westerly granite? The uniaxial compression tests of plate-shape granite samples ...

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compressive Strength Of Black granite Rock

The strength values are comparable to determinations of uniaxial compressive strength tests of Westerly granite, which range from 130 MPa to 210 MPa (Heard and others, 1974). The slopes of best-fitting lines to the elastic portions of the stress-strain data from the strength experiments were taken for the values of Young's modulus.

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Impact of weathering on rock material strengths of

A total of 298 geomechanical strength tests were conducted for fresh as well as slightly weathered rock material employing the uniaxial compressive strength test and Brazilan tensile strength test. Statistical analysis of the results at 95 percent confidence level exhibited that the means of compressive strength for fresh and slightly weathered granites were 113.6±7.0 MPa and 68.9±3.6 MPa ...

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Experimental study of the influence of temperature and ...

ity, elastic modulus, and uniaxial compressive strength of the test specimen decrease with an increase in its heating temperature under both cooling modes. (b) The char-acteristics of the stress-strain curve of granite are different after different tempera- tures and cooling modes. With natural cooling, the stress-strain curve features double peaks in the range of 200-300°C, whereas such ...

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Composition and Physical Properties Of Granitic Rocks from ...

The strength values are comparable to determinations of uniaxial compressive strength tests of Westerly granite, which range from 130 MPa to 210 MPa (Heard and others, 1974). The slopes of best-fitting lines to the elastic portions of the stress-strain data from the strength experiments were taken for the values of Young's modulus. There is a rough positive correlation between these two ...

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Estimating Unconfined Compressive Strength of Sedimentary ...

[4] relating uniaxial compression and the point load tests on a variety of rocks. They found the following linear regression model to correlate the UCS and I s(50). qI u = +16.3 15.3 s(50) 3. The UCS Test There are three types of compressive strength tests of rocks as defined by Jaegar l. [5]; the first is the UCS et a

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Study on the dynamic uniaxial compressive strength of

Title Study on the dynamic uniaxial compressive strength of granite. Author(s) Li, HB; Zhao, J; Li, TJ; Li, JR. Published in Chinese Journal of Blasting and Impact, (in Chinese) Volume Supplement Volume. Pages 771-774. Date 1999. Laboratories LMR. Record Appears ...

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Deformation and failure characteristics of weathered ...

30/07/2019  Both uniaxial compressive strength (UCS) and elasticity modulus of weathered granite sufficiently drop, compared to experimental data of unweathereded granite. The ultimate failure exhibits brittle behavior. (2) the number of AE hits and their energy can reach their individual peaks during crack closure, elastic and plastic deformation and failure. AE signals of weathered granite mainly result ...

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Thermo-mechanical properties of Bundelkhand granite

30/06/2015  Both alkali granites and plagioclase granite show the trend of increase in uniaxial compressive strength value with increase in strain rate. But in plagioclase granites, increase in compressive strength is insignificant from low strain rate (0.05 mm/min) to standard strain rate (0.5 mm/min). But at higher strain rate (5.0 mm/min) to very high strain rate (50.0 mm/min) it increases ...

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uniaxial compressive strength of granite

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. Uniaxial compressive strength of Westerly granite? The uniaxial compression tests of plate-shape granite samples ...

More

Artificial Intelligence Forecasting Models of Uniaxial ...

Request PDF Artificial Intelligence Forecasting Models of Uniaxial Compressive Strength The uniaxial compressive strength (UCS) is a vital rock geomechanical parameter widely used in rock ...

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What is the tensile and compressive strength of granite ...

Compressive strength is greater than tensile strength not just in beams, but in metals, concrete, ceramics, ice, and many other materials. Consider a uniaxial test of tension or compression.

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Composition and Physical Properties Of Granitic Rocks from ...

The strength values are comparable to determinations of uniaxial compressive strength tests of Westerly granite, which range from 130 MPa to 210 MPa (Heard and others, 1974). The slopes of best-fitting lines to the elastic portions of the stress-strain data from the strength experiments were taken for the values of Young's modulus. There is a rough positive correlation between these two ...

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Predicting the compressive and tensile strength of rocks ...

uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of rock for designing surface and underground structures. Determining these rock strengths is time- consuming and expensive, particularly for the preliminary studies of projects. For this reason, indirect tests such as Schmidt rebound number and, ultrasonic test are often used for predicting rock strength. Since indirect ...

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Estimating Unconfined Compressive Strength of Sedimentary ...

[4] relating uniaxial compression and the point load tests on a variety of rocks. They found the following linear regression model to correlate the UCS and I s(50). qI u = +16.3 15.3 s(50) 3. The UCS Test There are three types of compressive strength tests of rocks as defined by Jaegar l. [5]; the first is the UCS et a

More

Correlation between Uniaxial Compressive Strength and ...

uniaxial compressive strength from the results of the point load test. 4. Test Results and Discussion 4.1 Uniaxial Compressive Strength Test Results 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

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