strength reduction in all weathering grades are not so obvious since all specimens show variation of strength reduction from 5 % to 15 %. Then it can be deduce that 50% amplitudes of cyclic loads could reduce uniaxial compressive strength of weathered granite up to 15% average.

The results show that the tensile strength and uniaxial compressive strength of Beishan granite are 8.66 and 162.9 MPa, respectively. Dilatancy appears when the stress reaches about 81% of the peak strength. Heterogeneity is introduced by Weibull distribution in …

Geophysical electrical techniques as a non-destructive test can be used both in the laboratory and in-situ. In this research, special electrodes were connected to the granite core samples to …

Therefore this research work is to assess and determine the effects of cyclic loading on the uniaxial compressive strength of weathered granite. With the use of advance GCTS Triaxial RTX-3000 machine, it is now possible to apply a fixed number of …

The Young's modulus of elasticity is the elastic modulus for tensile and compressive stress in the linear elasticity regime of a uniaxial deformation and is usually assessed by tensile tests. See …

The compressive strength of 207.5, 204.6 and 203.4 MPa; and tensile strength of 13.86, 13.68 and 13.60 MPa were obtained for A, B and C respectively. Rockwell hardness values obtained …

Uniaxial compressive strength (UCS) is the most widely used mechanical property parameter for rocks, and uniaxial compression tests are comparably accessible and cost-effective 12, 13,...

After water-cooling on the heated granite (300 °C), combined with the CO 2 bearing fluid stimulation (240 °C, 20 MPa), the permeability of granite is the highest, increasing by 17 times that of the initial state, and the porosity also increases by 144.4%, while the elastic modulus and compressive strength decrease by 14.3% and 18.4%, respectively.

The uniaxial compressive strength clearly increases at 200°C and decreases gradually when the temperature exceeds 300°C. Under the same temperature conditions, the uniaxial compressive strength of granite decreases and the elastic modulus increases with increasing loading rate.

The uniaxial compressive strength (UCS) of sandstone is an important mechanical property with regard to buildings [ 12, 13 ]. Experimental studies have demonstrated that UCS primarily varies according to the mineralogy and microstructure of the material. The elastic modulus and UCS are fundamental mechanical properties of rocks.

Specimens (Granite, Marble, and Red -sandstone) with 50 mm in height and length, 30 mm in width were under constant strain rate conditions (1 mm/min) to get the uniaxial compressive strength (UCS). The dimension of the uniaxial compressive numerical model was the same as the experimental specimens.

The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing. It is also known as the unconfined compressive strength of a material because confining stress is set to zero. ... The results of the strength tests show that granite has the highest mean ...

Normal variation of compressive strength and the factor m in Hoek-Brown failure criterion for some rocks (data from Hanssen, 1988; Hoek and Brown, 1980 and Hoek et al., 1992). Rock name Uniaxial compressive strength c Rating of the factor Rock name Uniaxial compressive strength c factor Rating of the low average high m i

6 27.7.5 Compressive Strength. Uniaxial compressive strength (UCS) is one of the most important ...

The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing. It is also known as the unconfined compressive strength of a material because confining stress is set to zero. Learn more in: Prediction of The Uniaxial Compressive Strength of Rocks Materials

Generally, under uniaxial compression, the peak strength and crack damage threshold first remain relatively constant at T ≤ 300 °C, begin to decrease at T = 450 °C, and decrease more rapidly at T = 600 °C. The confining pressure notably reduces the effect of the temperature on the peak strength and crack damage threshold.

This difference can be significant and splitting failures have been found by the author to be 25-50% lower in strength than shear failures. This contributes to the quite large scatter often...

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 …

Therefore this research work is to assess and determine the effects of cyclic loading on the uniaxial compressive strength of weathered granite. With the use of advance GCTS …

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

Abstract The study of dynamic uniaxial compressive strength of granite at strain rate from 10 -4 to 10 0 s -1 is conducted using sliding crack model. It is shown that the theoretical strengths increase with increasing strain rate and agree well with the experimental results.

The uniaxial compressive strength, elastic modulus, point load strength, Schmidt hammer value, P-wave velocity, density and porosity …

for different rock typ The UCS, tensile strength and point load index for granite range from 100 to 300 MPa, 7 to 25 MPa, and 5 to 15 MPa respectively The point load test is intended as an index test for the strength classification of rock materials with which is correlated Zacoeb and Ishibashi, 2009 In order to estimate UCS indirectly ....

Abstract: Uniaxial compressive strength (UCS) is one of the most important parameters to character- ize the rock mass in geotechnical engineering design and construction. In this study, a novel kernel extreme learning machine-grey wolf optimizer (KELM-GWO) model was proposed to predict the UCS of 271 rock samples.

The average compressive strength and standard deviation were found to be 15,707 psi and 398 psi, respectively. Analysis of the data proves that the compressive strength of marble is not influenced by steel end platen size or thickness. Similarly, low standard deviation and lack of trend occurred for the other three rock types.

The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing. It is also known as the unconfined compressive strength of a material because confining stress is set to zero. Alternate Form: unconfined compressive strength, unconfined compressive strength

Expert Answers: The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing. It. ... The results of the strength tests show that granite has the highest mean value of 101.67 MPa for Unconfined Compressive Strength (UCS) ...

Most of these studies considered the uniaxial compressive strength of the granitic rocks as an indicator for the suitability of the granitic rocks in industrial use for …

Accurate estimation of the uniaxial compressive strength of rock is very crucial for the safety of construction activities occurring in the rock mass. However, the uniaxial compressive strength test is expensive and time consuming. Moreover, the uniaxial compressive strength test cannot be performed in the field.

Circular defects are widely distributed in porous rock materials, and the defects greatly affect the mechanical behavior and crack evolution of rock masses. In this paper, numerical models containing random circular defects are constructed based on discrete element method. Then, the uniaxial compressions are numerically performed to reveal the influence of the porosity or …