Temperature-Induced Deterioration Mechanisms in Mudstone during Dry–Wet Cycles

Hu, Ming; Liu, Yuanxue; Ren, Jianbo; Wu, Runze

doi:10.1007/s10706-017-0295-8

Cited by 13 publications

(5 citation statements)

References 30 publications

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“…To ensure homogeneity, the samples for each treatment were selected from the same mudstone block. And they were cut into similar-sized cubes (180 mm × 180 mm × 180 mm) with an electric saw and drilled through to make to a 15 mm diameter borehole with an electric drill, which was the channel of inlet water and drainage from the centre of the top surface to the bottom surface [23].…”

Section: Dry-wet Cycle Testmentioning

confidence: 99%

Constitutive Model and Damage Evolution of Mudstone under the Action of Dry‐Wet Cycles

Liu

Song

et al. 2018

Advances in Civil Engineering

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Mudstone is a natural type of geological material, which has different ways of mechanical response between natural state and dry-wet cycles. According to the complex damage theory of geological materials, rock masses can be considered as a composite material consisting of the structure phase and damage phase. The essence of the damage of rock masses is a damage evolution process, during which the deformation energy of the structure phase converts into dissipation energy of the damage phase, and the energy dissipation from phase transformation promotes the structure phase to change into the damage phase. In this study, a customized model test container and a novel test method are applied to study the decay rate of mudstone under different temperatures and over multiple dry-wet cycles. The decay rate and the damage variable are connected with each other and applied to the damage constitutive equation based on the energy principle to set up the damage evolution equation under the coupled action of dry-wet cycles and loads. Comparison of the proposed model with test results in a literature identifies the rationality of the established model and properly reflects the damage evolution of mudstone.

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Section: Dry-wet Cycle Testmentioning

confidence: 99%

Constitutive Model and Damage Evolution of Mudstone under the Action of Dry‐Wet Cycles

Liu

Song

et al. 2018

Advances in Civil Engineering

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“…However, the rock may gain strength due to the cementation of the discontinuities through the cementation agents such as ferrous oxides, calcite, or siliceous lling material (Aydan et al, 2013). The interaction between rock constituents and the moisture results in the swelling and nally aking of the surface matter Erguler and Ulusay, 2009;Hu et al, 2017). Smectite, mixedlayer clays, and zeolites are generally responsible for the volume change of the rock structure (Vergara and Triantafyllidis, 2016;Selen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Development of a universal landslide hazard potential model for mudrock slopes: fuzzy logic and molecular-level modelling approaches

2023

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The phenomenon of the reduction of shear strength due to moisture-induced swelling and subsequent slaking of the mudrocks is one of the leading causes of landslide hazards in mountainous terrain. In the practice, empirical/semi-empirical approaches adopted for the determination of this hazard are mostly based on macro-level factors. But they do not comprehensively cover the micro-level factors, which contribute to the complex swelling/slaking process. Therefore, a comprehensive fuzzy-logic-based model was developed in this study, which includes both the macro-level landslide contributing factors and the micro-level factors, such as mineralogy, cementation, cation exchange capacity, in situ moisture content, density, and stress state. The model resulted from the molecular simulations of swelling and the subsequent slaking processes using Monte Carlo, molecular mechanics, and molecular dynamics. The results of the micro-level model are incorporated into the fuzzy-logic model to create a universal landslide hazard potential model for the slopes composed of mudrocks. The micro-level behaviour is incorporated in the coupled model via the cohesive energy density parameter for the mudrocks. The nal coupled model was veri ed through the accurate prediction of the landslides and also by comparing the predicted terminal water content with the water content of the mudrock samples collected from the triggered landslides.

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“…Yao et al (2020) investigated the physical and mechanical features of sandstone subjected to cyclic wetting-drying of Yangtze River water. Furthermore, some researchers investigated the weakening of rocks under the wetting-drying cycles in acidic or alkaline water environment (Tang and Wang 2002;Liu et al 2016b;Han et al 2016;Yuan et al 2018), rock weakening caused by temperature during wetting-drying cycles (Zhang et al 2015;Hu et al 2017) and the impact level of wet-dry, freeze-thaw, and heat-cool cycles on the rock mechanical properties (Hale and Shakoor 2003;Wang et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Weakening of Discontinuities at the Interface Between Different Rock Types Induced by Wetting and Drying Cycles

Meng

Tang

et al. 2022

Rock Mech Rock Eng

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Recent research has paid little attention to weakening of discontinuities with different joint wall material (DDJM) induced by wetting and drying cycles. Experimental investigations were conducted to examine the effects of wetting-drying cycles on weakening of three typical types of natural planar DDJM collected from a sliding-prone formation in the Three Gorges reservoir region of China. Deterioration of the corresponding four types of discontinuities with identical joint wall material (DIJM) were also been studied for comparison. The weakening laws of DDJM were revealed from macro-and microperspectives by testing on mineral compositions, microstructures and water absorption rate of joint walls as well as shear strength of discontinuities. The results indicate that the repeated wetting-drying cycles lead to obvious changes in microstructure and increases of macro water absorption rate for the studied joint walls with the changing degree closely related to their clay mineral contents; the peak shear strengths of DDJM gradually decreases with the wetting and drying cycles for a certain normal stress with the weakening rate between that of the DIJM with two joint wall materials of the DDJM, while closer to that of DIJM with the weak half materials of the DDJM; significant correlations have been found between the variation coefficient of rock microstructure of joint walls and the macrodeterioration coefficient of DDJM; the changing rates of multiscale parameters before and after six wetting-drying cycles vary obviously, indicating the weakening is slowed down after six wetting-drying cycles for the studied discontinuities. Highlights• Effects of wetting-drying cycles on weakening discontinuities with different joint wall material were studied. • Deterioration of the discontinuities with identical joint wall material were also been investigated for comparison. • The weakening laws were revealed from macro and micro perspectives.• Significant correlations have been found between the variation coefficient of microstructure of joint walls and themacro deterioration coefficient. • The results could provide a basis to better understand the stability evolution of rock slopes with soft and hardrock interbedded. KeywordsDiscontinuities with different joint wall material (DDJM) • Discontinuities with identical joint wall material (DIJM) • Weakening of discontinuities • Wetting and drying cycles • Shear strength • Microstructure • Multi-scale deterioration * Huiming Tang

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Temperature-Induced Deterioration Mechanisms in Mudstone during Dry–Wet Cycles

Cited by 13 publications

References 30 publications

Constitutive Model and Damage Evolution of Mudstone under the Action of Dry‐Wet Cycles

Constitutive Model and Damage Evolution of Mudstone under the Action of Dry‐Wet Cycles

Development of a universal landslide hazard potential model for mudrock slopes: fuzzy logic and molecular-level modelling approaches

Experimental Investigation on Weakening of Discontinuities at the Interface Between Different Rock Types Induced by Wetting and Drying Cycles

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