Experimental study on influence of wetting-drying cycle on dynamic fracture and energy dissipation of red-sandstone

Du, Bin; Cheng, Qiangqiang; Miao, Leigang; Wang, Junqiang; Bai, Haibo

doi:10.1016/j.jobe.2021.102619

Cited by 15 publications

(7 citation statements)

References 39 publications

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“…Dynamic Impact Test. The dynamic impact test on the SHPB system was completed (Figure 2) [11]. During the test, the cylindrical punch impinged on the input rod along the axial direction at a constant speed, causing stress waves to form in the input rod.…”

Section: Acid Dry-wet Cyclementioning

confidence: 99%

“…The results demonstrated that the tensile strength of sandstone with a low clay mineral concentration reduces somewhat, owing to the fact that the expansion and dissolution of clay minerals play minimal part in the sandstone weakening process. SHPB tests were used by Du et al [11] to examine the effect of dry-wet cycles on the dynamic fracture characteristics of red sandstone. The findings indicate that the dynamic fracture toughness of red sandstone does not increase when the critical loading rate is surpassed.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of the Dynamic Mechanical Behavior and Degradation Mechanism of Red Sandstone in Acid Dry-Wet Cycles

Sun

Cheng

2023

Geofluids

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In this paper, the slit Hopkinson pressure bar (SHPB) experiments were conducted to investigate the dynamic mechanical characteristics of red sandstone during acid dry-wet cycles. The appearance of the samples was evaluated using scanning electron microscopy, and the process of red sandstone degradation under acid dry-wet cycles was examined. The results reveal that, as compared to neutral solution, acid solution enhances the degree of degradation induced by dry-wet cycles in red sandstone. The dynamic compressive strength and elastic modulus of red sandstone steadily decline as the number of dry-wet cycles increases, and the lower the pH of solution, the greater the reduction. The mechanism of degradation of red sandstone during acid dry-wet cycles may be explained in two ways. First, the chemical interaction between the mineral components in the sample, such as cement and feldspar, and H+ in the acid solution has accelerated the formation of secondary pores and fractures, resulting in a decrease in the cementation capacity between mineral particles. Second, partial breakdown of the major mineral particles softens the mineral skeleton.

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Section: Acid Dry-wet Cyclementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Dynamic Mechanical Behavior and Degradation Mechanism of Red Sandstone in Acid Dry-Wet Cycles

Sun

Cheng

2023

Geofluids

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“…Taking group Q as an example, limestone samples are dried continuously at 105 °C for 24 hours in a constant temperature oven and then soaked naturally in pH = 3 acidic aqueous solution (3 : 1 sulfuric acid + nitric acid) for 48 hours after cooling. The established dry-wet cycles in the process are derived by referring to the relevant test results [12][13][14]. Limestone samples numbered in the Q group are tested for n = 1, 5, and 10 dry-wet cycles.…”

Section: Test Procedurementioning

confidence: 99%

“…In addition, more than 70% of the rainfall occurred from April to August according to the recorded data from 1951 to 2019 in Guilin [1]. Therefore, a rock mass is usually in a state of wetting and drying cycles, and the damage and deterioration of the rock mass caused by this cyclic change is often more serious than that of sustained immersion [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Influence of Acidic Dry-Wet Cycles on Karst Limestone Deterioration and Damage

Zhang

Wang

et al. 2022

Geofluids

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This study is aimed at the problem of limestone deterioration and damage caused by the combination of acid rain and the dry-wet cycle in Guilin. Samples of limestone were taken to study the influence of acidic dry-wet cycles on limestone deterioration and damage. This was accomplished by performing nuclear magnetic resonance (NMR) measurements and inductively coupled plasma atomic emission spectrometer measurements on the limestone samples. The study found that with an increase in the number of cycles, the T 2 curve of the rock continuously shifts to the right, but the range of movement still decreases with pH increasing values. The T 2 spectrum area, rock porosity, porosity deterioration, mass loss rate, and water absorption rate all increase with an increase in the number of cycles, but the growth rate continues to decrease, and the increase is negatively correlated with pH. After the dry-wet cycles, the mass concentration of each element in the beaker is Ca, Mg, and Fe in order from high to low, and the mass concentration of each main element in the reaction solution increases with the increase in the number of acidic dry-wet cycles.

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“…As one of the most widely distributed lithologies in the TGRA, sandstone has been studied by various researchers on its macro-deterioration effect under dry-wet cycles [1]. With the increase of dry-wet cycles, the porosity, water absorption, and permeability of sandstone gradually increase, while the wave velocity of rock decreases [3][4][5]. It was also found through various mechanical tests that the mechanical parameters of sandstone deteriorated to varying degrees, such as compressive strength, tensile strength, shear strength, elastic modulus, cohesion, and internal friction angle [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Deterioration Effect of Sandstone Tensile Strength and Its Mesoscopic Mechanism under Dry-wet Cycles

Yang

Zhang

Deng

et al. 2023

Period. Polytech. Civil Eng.

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The rock mass in the hydro-fluctuating zone of the reservoir bank slope is under dry-wet cycles for a long time, which will cause the deterioration of rock mass and induce geological disasters. In this study, a series of dry-wet cycle tests on the argillaceous quartz sandstone in the Three Gorges Reservoir area was carried out. Then, after different dry-wet cycles, the sandstone specimens were used to conduct the Brazilian splitting, scanning electron microscope, and 3D laser scanning tests. Herein, we provided detailed physical and microscopy image data to analyze the deterioration effect of tensile strength and mesostructure deterioration process of sandstone. With the increase of dry-wet cycles, the tensile strength of sandstone initially decreases rapidly, and then the decline rate tends to slow down. The evolution laws of fractal dimension and porosity are also significantly consistent with the deterioration of tensile strength. Moreover, further mesostructural analysis has revealed the repeated “absorption and swelling-dehydration and contraction” of clay minerals. This results in the breakage of framework mineral quartz and the expansion and connectivity of internal cracks, which ultimately deteriorates sandstone’s tensile strength.

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Experimental study on influence of wetting-drying cycle on dynamic fracture and energy dissipation of red-sandstone

Cited by 15 publications

References 39 publications

Experimental Study of the Dynamic Mechanical Behavior and Degradation Mechanism of Red Sandstone in Acid Dry-Wet Cycles

Experimental Study of the Dynamic Mechanical Behavior and Degradation Mechanism of Red Sandstone in Acid Dry-Wet Cycles

Experimental Investigation on Influence of Acidic Dry-Wet Cycles on Karst Limestone Deterioration and Damage

Deterioration Effect of Sandstone Tensile Strength and Its Mesoscopic Mechanism under Dry-wet Cycles

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