gypsum rock in civil engineering

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Physical and Mechanical Properties of Gypsum-Like Rock
2020.2.10 Abstract In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious
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(PDF) Physical and Mechanical Properties of
2020.6.29 PDF In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when
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Laboratory Tests on Swelling Properties of Field
2023.1.4 Abstract. The reaction between gypsum rock and water results in swelling deformation and swelling pressure. Swelling deformation and swelling pressure cause damage to underground engineering such
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PhysicalandMechanicalPropertiesofGypsum-Like
2023.8.10 In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when en- countering water, which is easy to
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(PDF) Constitutive Model of Swelling Gypsum Rock
2020.10.8 PDF Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and...
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Experimental investigation into the effects of composition
2021.7.15 Gypsum has long been considered an important raw material for engineering construction. Based on its microstructure and component, gypsum rocks can
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Experimental Study on Physical and Mechanical Properties of Gypsum Rock ...
2021.1.5 In order to study the physical and mechanical properties of gypsum rock samples in three states (natural, high-temperature dehydration and hydration time),
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Study on Expansion Characteristics and Expansion
2022.9.9 Gypsum rock is the ﬁrst type of expansive rock, and it con- tains anhydrite (CaSO 4 ), plaster of paris (CaSO 4∙H 2O), and hemihydrate gypsum (CaSO 4∙0.5H 2
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Physical and Mechanical Properties of Gypsum-Like Rock
Advances in Civil Engineering / 2020 / Article / Fig 4 / Research Article Physical and Mechanical Properties of Gypsum-Like Rock Materials. Figure 4. Test of physical and
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ResearchArticle Constitutive Model of Swelling Gypsum
2020.10.8 characteristics of gypsum rock and obtained the relation-ships between swelling stress and water absorption also
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(PDF) Physical and Mechanical Properties of
2020.6.29 Yu et al. [10] found that the changes in the microstructure of gypsum crystals in different concentrations of salt solution seriously affected its physical and mechanical properties, especially ...
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Wei LI Assistant Professor Doctor of Philosophy
I am a civil engineer and geoscientist. Combining theoretical and experimental methods, I study the subsurface solid-fluid systems in the context of climate change, infrastructure resilience, and ...
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Damage Mechanism and Stress Distribution of Gypsum
2022.4.21 of the gypsum rock pillar before and after each blasting test was obtained to analyse the damage mechanism of gypsum rock subjected to blasting disturbance. 2.2. Testing Parameter The gypsum rock pillar (40 m (length) 15 m (width) height (4 m)) tested was a strip-shaped isolated pillar exhibiting continuity and integrity. The horizontal distance
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(PDF) Laboratory Tests on Swelling Properties of Field-Coring Gypsum ...
2023.1.4 The reaction between gypsum rock and water results in swelling deformation and swelling pressure. Swelling deformation and swelling pressure cause damage to underground engineering such as tunnels ...
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Laboratory Tests on Swelling Properties of Field-Coring
2023.1.4 deformation and swelling pressure of gypsum rock may cause damage, which ﬁnally affects the stability of the engineering site [3–6]. Therefore, it is of practical signiﬁcance to study the swelling characteristics of gypsum rock [4,5,7,8]. The swelling of gypsum rock is the result of coupling effects of physical swelling and chemical ...
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A Stability Analysis of an Abandoned Gypsum Mine Based
2023.11.22 An abandoned gypsum mine has been discovered beneath the route of a highway construction in Hunan province, south China. Due to the highway construction and operations safety, there is an urgent need for a comprehensive stability analysis of the abandoned mining area. The 3D laser scanning detection technique has been adopted,
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Damage Mechanism and Stress Distribution of Gypsum
2022.5.16 Gypsum is an indispensable mineral resource in the ﬁelds of civil and construction engineering; additionally, mining intensity continues to increase annually. Room-pillar ... to gypsum rock pillars subjected to multiple blasting disturbances was investigated via ﬁeld tests. A numerical calculation model of a gypsum mined gob with ...
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Different mechanical and cracking behaviors of single
2022.12.6 Gypsum as a rock-like material, which can be molded to any geom- etry with an easy fabrication of fractures or ﬂaws inside, has been used as a model material of natural brittle rocks for over 40 ...
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ResearchArticle Constitutive Model of Swelling Gypsum
2020.10.8 ResearchArticle Constitutive Model of Swelling Gypsum Rock Chongbang Xu,1,2,3 Xiaojing Gao ,1,2,3 Kaishun Zhang,4 Zhiguo Liu,4 and Fan Zhao4 ...
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FJUT教师个人主页江松--江松
1 天前 [6] Deterioration behavior of gypsum breccia in surrounding rock under the combined action of cyclic wetting-drying and flow rates. Bulletin of Engineering Geology and the Environment. 2021. [7] A new large step-tapered hollow pile and its bearing capacity.
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Experimental Study on Physical and Mechanical Properties of Gypsum Rock ...
2021.1.5 In order to study the physical and mechanical properties of gypsum rock samples in three states (natural, high-temperature dehydration and hydration time), natural gypsum rock was put into high-temperature condition of 220°C for dehydration treatment, and then the high-temperature dehydrated gypsum rock was treated with different
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Rockburst characteristics of gypsum-like rocks after fatigue
2022.7.28 In underground engineering applications, surrounding rock is often subjected to dynamic disturbances, such as vehicle loading, earthquakes, blasting, or other vibrations. Consequently, fatigue damage, collapse, and rock burst may happen. In this study, a dynamic fatigue rock mechanics testing machine was used to study the rock
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Experimental investigation into the effects of composition
2021.7.15 The present work investigated the differences in the composition and internal microstructure of four types gypsum rock—fiber gypsum, transparent gypsum, alabaster, and ordinary gypsum by X-ray ...
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Influencing Factors for the Instability and Collapse Mode of
2021.3.27 These three factors weakened the gypsum rock in different degrees. After 120 days of immersion, water had the greatest effect with a strength-weakening rate of 52.61%. ... types and temperatures on the mechanical properties and microstructure of cemented paste backfill,” Advances in Civil Engineering, vol. 2021, Article ID 6652176, 10 ...
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SVXPURFNV - IOPscience
2022.6.15 1 Civil Engineering Department, University of Technology, Baghdad, Iraq 2 Department of Production Engineering and Metallurgy, University of Technology, Baghdad, Iraq * Corresponding author: [email protected] Abstract When the gypsum rock is exposed to the relative humidity in a closed environment for a continuous
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Technical Note Laboratory Tests on Swelling Properties
2023.1.4 swelling deformation and swelling pressure of gypsum rock may cause damage, which finally affects the stability of the engineering site [3–6]. Therefore, it is of practical signifi-cance to study the swelling characteristics of gypsum rock [4,5,7,8]. The swelling of gypsum rock is the result of coupling effects of physical swelling and ...
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(PDF) Constitutive Model of Swelling Gypsum Rock
2020.10.8 Abstract and Figures. Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls ...
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Effect of Microstructure and Relative Humidity on
2022.8.12 The experimental results presented in this paper show the evident worsening of mechanical response of gypsum rock in presence of high humidity conditions. The mechanical tests underlined a clear decrease in short-term strength and stif-ness in presence of high relative humidity (i.e. RH = 90%).
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Characterization and modeling of long-term stress
2017.8.1 For gypsum rock with different gypsum contents, the parameter q ranged from 0.47 to 1.3, ... Nihad Bahaaldeen Salih obtained his BSc degree in Civil Engineering from Tikrit University, Iraq, in 1996 and MSc degree in Geotechnical Engineering from University of Technology, Baghdad, Iraq, in 2003, and his PhD in Geotechnical
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(PDF) Softening damage analysis of gypsum rock with
2019.9.2 Gypsum rock is also highly hydrophilic, quickly absorbing water and softening (Zhu et al. 2019). With increased water content and immersion time, the compressive strength and elastic modulus of ...
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Laboratory Investigation on Physical-Mechanical Characteristics
2021.6.5 Gypsiferous soils are considered as problematic soils that cause damage to engineering infrastructures, particularly hydraulic structures. The exposition of gypsiferous soils to the steady flow leads to the dissolution of gypsum particles, significantly changing the soil engineering characteristics. In this paper, by employing physical, chemical, and
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Constitutive Model of Swelling Gypsum Rock - Hindawi
2020.8.3 Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls during construction and operation. It is of practical significance to study the swelling mechanical behavior of such rocks by tests. Swelling strain tests and swelling
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(PDF) Macro-Microscopic Deterioration Behavior of Gypsum Rock
2022.9.15 Gypsum rock is highly sensitive to a water environment due to its unique physical and chemical properties, such as high solubility. ... Aerospace and Civil Engineering, School of Engineering, The ...
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Experimental Study on Physical and Mechanical
2021.3.12 of Gypsum Rock During High-Temperature Dehydration–Hydration Expansion Sijiang Wei,1,2 Yushun Yang ,3,5 Chongbang Xu,4 Meng Wang,1,2 Wenlong Shen,1,2 and Chengdong Su1,2 ... 3Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Jiangsu 223001, China.
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Visco-Elastoplastic Constitutive Fatigue Model for Rocks
The study on the constitutive fatigue model for rocks under cyclic loading has an important significance in rock engineering. In order to study the fatigue properties of rocks under cyclic loading, according to the theory of rheological mechanics and the existing three basic one-dimensional fatigue elements, i.e., elastic, viscous, and plastic fatigue elements, the
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(PDF) Characterization and modeling of long-term stress
2017.6.1 For gypsum rock with different gypsum contents, the parameter q ranged from 0.47 to 1.3, as summarized in Table 1, indicating that the m aterial behavior is more linear with soaking time and confined
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Macro-Microscopic Deterioration Behavior of Gypsum Rock
2022.9.15 Gypsum rock is highly sensitive to a water environment due to its unique physical and chemical properties, such as high solubility. After wetting, the internal microstructure of gypsum rock is damaged, and the mechanical properties deteriorate accordingly, leading to serious engineering problems for gypsum-bearing geotechnical
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Experimental Study on Fatigue Life of Gypsum-Like Rock
2022.3.2 When the surrounding rock is subjected to cyclic loading, its physical and mechanical properties show fatigue damage properties under the action of periodic engineering, disturbance stress. In this research, the fatigue life test of gypsum-like rocks was carried out by using a dynamic fatigue testing machine. During the cyclic loading
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Dynamic mechanical properties of different types of rocks
2023.11.6 The numerical model parameters were calibrated through static tests, which were then used to validate the results of the dynamic tests. To obtain the static properties of different types of rocks ...
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Stability of Gypseous Soil Slopes Using the Upper Bound
2020.12.22 The effect of gypsum content on the stability of gentle slope is found to be more damaging than that for steep slopes. For saturated gentle soil slopes, the reduction in factor of safety can reach up to 90 or 70% depending on the equation used to estimate the soil strength parameters. The aim of the study to implement the upper bound theorem to ...
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