The effect of weathering on durability and deformability properties of granitoid rocks

Momeni, Aliakbar; Hashemi, Somayeh; Khanlari, Gholamreza; Heidari, Mojtaba

doi:10.1007/s10064-016-0999-7

Cited by 63 publications

(25 citation statements)

References 21 publications

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“…Several studies have conducted on the weathering of rock. Momeni et al [20] analyzed the strength attenuation law of rock with different weathering degree by employing rock uniaxial compression tests, which then provided basis for the initial obtainment of rock strength according to the weathering degree of onsite rock. Prodam et al [21] determined the variation rule of mineral composition and changing law of shear strength of siltstones with different weathering degree through field investigation and laboratory tests.…”

Section: State Of the Artmentioning

confidence: 99%

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Weathering Mechanism of Soft Rock under the Combined Effect of Pressure and Temperature

Wang¹,

Sun²,

Chang-yin³

et al. 2018

JESTR

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Cause analysis and depth calculation of rock cell can significantly help demonstrate the weathering mechanism of the soft rock of the rock cell. However, the current methods of analyzing weathering mechanism attach little importance to the mechanical environment of rock. Damage mechanics typically involves the calculation of a damage factor. To explore the weathering mechanism of soft rock at the lower part of gently inclining rock slope, this study based on the calculation method of a damage factor in damage mechanics, proposed a calculation formula for the damage factor of soft rock under the combined effect of pressure and temperature and the method for fatigue rupture. Then, taking the mudstone of a single rock cell in Hongyan Mountain of Jiangjin in China as an example, the calculation formula and method for soft rock were used to analyze its weathering mechanism. The analytical parameters included weathering rate, damage, and fatigue rupture of soft rock. Results show that the maximum influencing depth of temperature on soft rock is approximately 1.00-1.20 m, and the weathering rate of the soft rock is faster at the beginning of temperature fatigue loading. Weathering rate slows down with the fatigue number increasing. At the lower-level temperature difference, the weathering process of soft rock accelerates when the rock shifts from low to high temperature. However, when the soft rock is in large temperature difference, the weathering process accelerates at the relatively lower rate. The damage of the soft rock is linearly related to the pressure from the upper hard rock. Conclusions of this study provide a theoretical basis for the prevention and treatment of collapsed hazards of gently inclining rock slope.

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Section: State Of the Artmentioning

confidence: 99%

“…where α , β , and M represent the material parameters; N is the number of fatigue damage of soft rock; and σ T is temperature stress. Transforming formula (20), the strain of soft rock undergo ith fatigue action is expressed as:…”

Section: Identification Of Fatigue Rupture Of Soft Rockmentioning

confidence: 99%

Weathering Mechanism of Soft Rock under the Combined Effect of Pressure and Temperature

Wang¹,

Sun²,

Chang-yin³

et al. 2018

JESTR

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“…An impressive number of papers have been published in recent years addressing the subject of the effects of water-rock interaction on mechanical behavior of various rocks [6][7][8][9][10][11][12][13][14][15] . Previous studies have shown that the mechanism of water-rock interaction that leads to the weakening of strength mainly includes fracture energy reduction, capillary tension decrease, pore pressure increase, fractional reduction, and chemical and corrosive deterioration [16][17][18][19][20][21][22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

Effect of cyclic wetting-drying on tensile mechanical behavior and microstructure of clay-bearing sandstone

Guo

Sangbong

et al. 2020

Preprint

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The understanding of the weakening mechanism of tensile strength of rock subjected to cyclic wetting-drying is critical for rock engineering. Tensile strength tests were conducted on a total of 35 sandstone specimens with different wetting-drying cycles. The crack propagation process and acoustic emission characteristics of the tested samples were obtained through a high-speed camera and acoustic emission system. The results indicate that the tensile strength is observably reduced after cyclic wetting-drying, and the extent of the reduction is not only related to the number of wetting-drying cycle, but also closely related to the clay mineral content of the sample. In addition, as the cycles of wetting-drying increase, the effect of each single cycle on tensile strength get reduced until it becomes constant.. Moreover, the crack initiation and penetration time is prolonged as the number of wetting-drying cycle increases, which indicates that cyclic wetting-drying weakens the rock stiffness and enhances the ductility of sandstone. Meanwhile, the acoustic emission characteristics of the tested samples further confirmed the ductile behaviour of the sandstone samples with increasing wetting-drying cycle. Furthermore, through the analysis of the microstructure and mineral composition of the samples with different wetting-drying cycles, it is concluded that the main weakening mechanisms of sandstones containing clay minerals are frictional reduction, chemical and corrosive deterioration.

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Section: Introductionmentioning

confidence: 99%

Effect of cyclic wetting-drying on tensile mechanical behavior and microstructure of clay-bearing sandstone

Guo

Juan

et al. 2020

Preprint

View full text Add to dashboard Cite

The understanding of the weakening mechanism of tensile strength of rock subjected to cyclic wetting-drying is critical for rock engineering. Tensile strength tests were conducted on a total of 35 sandstone specimens with different wetting-drying cycles. The crack propagation process and acoustic emission characteristics were obtained through a high-speed camera and acoustic emission system. The results indicate that the tensile strength is observably reduced after cyclic wetting-drying, and the extent of the reduction is not only related to the number of wetting-drying cycle, but also closely related to the clay mineral content of the sample. In addition, as the cycles of wetting-drying increase, the effect of each single cycle on tensile strength is getting smaller and smaller until becoming constant. Moreover, the crack initiation and penetration time is prolonged as the number of wetting-dry cycle increases, which indicates that cyclic wetting-drying weakens the rock stiffness and enhances the ductility of sandstone. Meanwhile, the acoustic emission characteristics during the experiment further confirmed this phenomenon. Furthermore, through the analysis of the microstructure and mineral composition of the samples with different wetting-drying cycles, it is concluded that the main weakening mechanisms of sandstones containing clay minerals are frictional reduction, chemical and corrosive deterioration.

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The effect of weathering on durability and deformability properties of granitoid rocks

Cited by 63 publications

References 21 publications

Weathering Mechanism of Soft Rock under the Combined Effect of Pressure and Temperature

Weathering Mechanism of Soft Rock under the Combined Effect of Pressure and Temperature

Effect of cyclic wetting-drying on tensile mechanical behavior and microstructure of clay-bearing sandstone

Effect of cyclic wetting-drying on tensile mechanical behavior and microstructure of clay-bearing sandstone

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