Fracturing and Damage to Sandstone Under Coupling Effects of Chemical Corrosion and Freeze–Thaw Cycles

Han, Tielin; Shi, Junping; Cao, Xiuyun

doi:10.1007/s00603-016-1028-7

Cited by 105 publications

(56 citation statements)

References 25 publications

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“…e influence of hydrochemical corrosion on the sandstone destruction, crack opening, and expansion direction was obtained. Chen et al [6], Ding et al [7], Han et al [8], and Gao et al [9] had performed the physical and mechanical tests on the chemical corrosion and freeze-thaw cycles of granite, limestone, sandstone, and red sandstone, respectively. Physical and mechanical damage laws of rock under the combined action of the freeze-thaw cycle and water chemical solution were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Huo

Wang

et al. 2018

Advances in Civil Engineering

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e influence of acid solution and immersion time on the physicomechanical properties of sandstone is investigated. Uniaxial compression tests on sandstone samples are conducted to determine the variations of relative mass, deformation, and strength characteristics of sandstone subjected to different pH sulfuric acid corrosion values. e changes of pH and Mg 2+ and Ca 2+concentration of immersion solutions are monitored during soaking. e corrosion mechanism of sandstone attacked by the acid solution is discussed with the results of SEM tests. Based on the nondestructive CT scanning test, the damage variables of acidcorroded sandstone are deduced, and the damage degree of sandstone is quantitatively analyzed. e results indicate that the deformation characteristics of sandstone samples under acid attack are characterized by the softening of rock, and the softening degree gradually increases with the increase of the acidity and the soaking time. e peak strength of sandstone samples declines as soaking time extends. e chemical effects lead to a large amount of dissolution of the rock mineral assemblage, resulting in the large-scale development of the pores inside the rock, which changes the macroscopic mechanical properties. e damage variables of acid corrosion sandstone based on CT numbers are deduced, and the quantitative relationship between damage variables and immersion time is established, which provides a basis for constructing a damage constitutive model of sandstone in the acidic environment.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Huo

Wang

et al. 2018

Advances in Civil Engineering

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“…Many studies have indicated that the peak compression strength is not an inherent property of rock material, which is dependent on the external environment and loading form [3,4]. The failure process of rock material can be influenced by the distribution form of microcrack and friction resistance among particles within the specimen.…”

Section: Discussionmentioning

confidence: 99%

“…[1,2]. Many studies have indicated that the freeze-thaw effect has an extremely important influence on the physical-mechanical properties and fracture behaviors of rock material [3,4]. Therefore, a comprehensive understanding of the failure behavior of rock material under the freeze-thaw effect is crucial for the related engineering design in cold regions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Physical-mechanical Properties and Fracture Behaviors of Saturated Yellow Sandstone Considering Coupling Effect of Freeze-Thaw and Specimen Inclination

Chen

et al. 2020

Sustainability

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The effect of freeze-thaw on the physical-mechanical properties and fracture behavior of rock under combined compression and shear loading was crucial for revealing the instability mechanism and optimizing the structure design of rock engineering in cold regions. However, there were few reports on the failure behavior of rock treated by freeze-thaw under combined compression and shear loading due to the lack of test equipment. In this work, a novel combined compression and shear test (C-CAST) system was introduced to carry out a series of uniaxial compression tests on saturated yellow sandstone under various inclination angles (θ = 0°, 5°, 10°, and 15°) and the number of freeze-thaw cycles (N = 0, 20, 40, and 60). The test results showed that the P-wave velocity dramatically decreased, while the rock quality and porosity increased gradually as N increased; the peak compression strength and elastic modulus obviously decreased with the increasing θ and N, while the peak shear stress increased gradually with the increasing θ and decreased with the increase of N, indicating that the shear stress component can accelerate the crack propagation and reduce its resistance to deformation. The acoustic emission (AE) results revealed that the change of crack initiation (CI) stress and crack damage (CD) stress with the θ and N had a similar trend as that of the peak compression strength and elastic modulus. Particularly, the CI and CD thresholds at 60 cycles were only 81.31% and 84.47% of that at 0° cycle and indicated a serious freeze-thaw damage phenomenon, which was consistent with the results of scanning electron microscopy (SEM) with the appearance of some large-size damage cracks. The fracture mode of sandstone was dependent on the inclination angle. The failure mode developed from both the tensile mode (0°) and combined tensile-shear mode (5°) to a pure shear failure (10°–15°) with the increasing inclination angle. Meanwhile, the freeze-thaw cycle only had an obvious effect on the failure mode of the specimen at a 5° inclination. Finally, a novel multivariate regression analysis method was used to predict the peak compression strength and elastic modulus based on the initial strength parameters (θ = 0°, N = 0). The study results can provide an important reference for the engineering design of rock subjected to a complex stress environment in cold regions.

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“…Then, the FT cycle test of all the saturated sandstone specimens is conducted on an automatic FT testing machine. During each FT cycle, the samples were frozen at −20°C for 2 hours then thawed at 20°C for 2 hours . The number of FT cycles is determined by the deterioration characteristics of the physical and mechanical parameters of specimens subjected to FT cycles .…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

“…During each FT cycle, the samples were frozen at −20°C for 2 hours then thawed at 20°C for 2 hours. 20,22 The number of FT cycles is determined by the deterioration characteristics of the physical and mechanical parameters of specimens subjected to FT cycles. 23 Shen et al 23 adopted the FT coefficient R f 24 as a decision index to determine the number of FT cycles and analyzed some of the previous studies on sandstone subjected to FT cycles.…”

Section: Freeze-thaw Cycle Testingmentioning

confidence: 99%

Experimental study on effects of freeze‐thaw fatigue damage on the cracking behaviors of sandstone containing two unparallel fissures

Zhou

Niu

Zhang

et al. 2019

Fatigue Fract Eng Mat Struct

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This paper investigates the effects of freeze‐thaw (FT) fatigue damage on the cracking behaviors of sandstone specimens containing two unparallel fissures under uniaxial compression. First, the effects of FT fatigue damage and fissure angle on the mechanical properties of sandstone specimens are analyzed. Second, the real‐time cracking process of sandstone specimens is captured by a high‐speed digital video camera system. Seven crack coalescence patterns are observed in this experiment. Local strong fatigue‐damaged zones, which are visualized as white zones, are observed in the specimens subjected to FT cycles during loading. Finally, scanning electron microscopy (SEM) observations show that the local strong fatigue‐damaged zones mainly consisted of microcracks and micropores induced by the FT fatigue damage. These experimental results are helpful for improving the understanding of the cracking process in cold‐region engineering.

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Fracturing and Damage to Sandstone Under Coupling Effects of Chemical Corrosion and Freeze–Thaw Cycles

Cited by 105 publications

References 25 publications

Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Experimental Study on Physical-mechanical Properties and Fracture Behaviors of Saturated Yellow Sandstone Considering Coupling Effect of Freeze-Thaw and Specimen Inclination

Experimental study on effects of freeze‐thaw fatigue damage on the cracking behaviors of sandstone containing two unparallel fissures

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