Strength behaviour of sandstone subjected to polyaxial state of stress

Rukhaiyar, Saurav; Samadhiya, N. K.

doi:10.1016/j.ijmst.2017.06.022

Cited by 17 publications

(3 citation statements)

References 28 publications

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“…Rukhaiyar carried out polyaxial tests on cubical specimens of sandstone. The results show that the intermediate principle stress effect can not be ignored, and modified Mohr-Coulomb criterion is suitable for sandstone [6]. Jian-hua conducted a true triaxial test on different materials in the context of new mixed-boundary conditions to identify their stress-strain and strength under triaxial stress [7].…”

mentioning

confidence: 99%

“…An octahedral failure criterion was developed for asphalt mixture [19,20]. Qun compared the strength analysis theory with the traditional theory [21].Compared with the research in the geotechnical field [1][2][3][4][5][6][7][8][9][10][11][12][13][14], despite some research on some pavement materials strength under complex stresses being reported [15][16][17][18][19][20][21], it is necessary to study the true triaxial strength of the two most important pavement materials in China more deeply: asphalt mixture and cement-stabilized macadam with respect to, for example, the impact of intermediate principal stress on different gradations of the same type of mixtures. These studies will help to more accurately guide the pavement materials' composition design and even to provide a solution for early cracking of pavements.In this paper, a true triaxial test will be conducted on different gradations of asphalt mixture and cement-stabilized macadam, using a simple proprietary true triaxial apparatus, to examine the effect of intermediate principal stress on their strengths.…”

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confidence: 99%

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The Effect of Intermediate Principal Stress on Compressive Strength of Different Cement Content of Cement-Stabilized Macadam and Different Gradation of AC-13 Mixture

Guan

Hao-qing²,

Líu

et al. 2018

Applied Sciences

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Since the effect of intermediate principal stress on the strength of pavement materials is not entirely clear so far, a proprietary true triaxial apparatus was developed to simulate the spatial status of principal stresses to conduct compressive strength tests on different gradations of AC-13, different cement contents of cement-stabilized macadam. With the same minimum principal stress, the triaxial compressive strengths of cube specimens under different intermediate principal stresses were compared. The results indicate that, as the intermediate principal stress increases, the compressive strength of the specimen increases and then decreases; different gradations of AC-13 do not show much difference in triaxial compressive strength while different cement contents of cement-stabilized macadam indicate considerable difference. Analysis results suggest significant effect of intermediate principal stress on the compressive strength of pavement materials: for AC-13, the coarser the gradation, the greater the effect of intermediate principal strength on its strength; for cement-stabilized Macadam, the higher the cement content, the greater the effect of intermediate principal stress. Strength model analysis results suggest that Double-Shear-Corner Model is more suitable to characterize cement-stabilized macadam’s strength performance compared to the Mohr–Coulomb model and Double-Shear Model.

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confidence: 99%

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confidence: 99%

The Effect of Intermediate Principal Stress on Compressive Strength of Different Cement Content of Cement-Stabilized Macadam and Different Gradation of AC-13 Mixture

Guan

Hao-qing²,

Líu

et al. 2018

Applied Sciences

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“…Other designs allow further fluid sealing 49 and increased loading capacity 50 . Commercial true tri-axial testing apparatus products, such as TerraTek hydraulic fracturing cells, DCI Test Systems’ polyaxial stress frame, or Wille-Geotechnik’s advanced true triaxial test system, are also available and commonly used to investigate rock strength and hydraulic fracturing 51 , 52 .…”

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confidence: 99%

New Experimental Equipment Recreating Geo-Reservoir Conditions in Large, Fractured, Porous Samples to Investigate Coupled Thermal, Hydraulic and Polyaxial Stress Processes

McDermott

Fraser-Harris

Sauter

et al. 2018

Sci Rep

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Use of the subsurface for energy resources (enhanced geothermal systems, conventional and unconventional hydrocarbons), or for storage of waste (CO2, radioactive), requires the prediction of how fluids and the fractured porous rock mass interact. The GREAT cell (Geo-Reservoir Experimental Analogue Technology) is designed to recreate subsurface conditions in the laboratory to a depth of 3.5 km on 200 mm diameter rock samples containing fracture networks, thereby enabling these predictions to be validated. The cell represents an important new development in experimental technology, uniquely creating a truly polyaxial rotatable stress field, facilitating fluid flow through samples, and employing state of the art fibre optic strain sensing, capable of thousands of detailed measurements per hour. The cell’s mechanical and hydraulic operation is demonstrated by applying multiple continuous orientations of principal stress to a homogeneous benchmark sample, and to a fractured sample with a dipole borehole fluid fracture flow experiment, with backpressure. Sample strain for multiple stress orientations is compared to numerical simulations validating the operation of the cell. Fracture permeability as a function of the direction and magnitude of the stress field is presented. Such experiments were not possible to date using current state of the art geotechnical equipment.

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Polyaxial Rock Failure Criteria: Insights from Explainable and Interpretable Data-Driven Models

Fathipour‐Azar

2022

Rock Mech Rock Eng

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Strength behaviour of sandstone subjected to polyaxial state of stress

Cited by 17 publications

References 28 publications

The Effect of Intermediate Principal Stress on Compressive Strength of Different Cement Content of Cement-Stabilized Macadam and Different Gradation of AC-13 Mixture

The Effect of Intermediate Principal Stress on Compressive Strength of Different Cement Content of Cement-Stabilized Macadam and Different Gradation of AC-13 Mixture

New Experimental Equipment Recreating Geo-Reservoir Conditions in Large, Fractured, Porous Samples to Investigate Coupled Thermal, Hydraulic and Polyaxial Stress Processes

Polyaxial Rock Failure Criteria: Insights from Explainable and Interpretable Data-Driven Models

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