Mechanical Properties and Deterioration Instability of Filling Body with Gangue-Cement Material Based on AE Experiment

Yu, Guofeng; Han, Yunchun; Yu, Xiaoyang; Bao, Ren; Guo, Jiong; Feng, Qilin

doi:10.1155/2022/3818045

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…At present, in order to improve the stability and reliability of the filling body in the early and late stages, many scholars have carried out research on the ratio of the water-sand cemented materials [13,14] and also proposed the method of adding additives to improve the strength of the filling body, whereas the mechanical properties of the filling body with a polyethylene flexible material as a reinforced material have been less studied. Tan [15] explored the stress-strain relationship of ethylene-doped fiber concrete and revealed the influence of the polyethylene fiber on concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Properties of a Flexible Grid Filling Body

Liu

Chen

et al. 2023

Applied Sciences

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The fill mining method has become more widely used due to its advantages of a high resource recovery rate, reliability and safety, and reduced surface tailings storage. However, the mechanical properties of the cemented fillings in fill mining are similar to those of ultra-low strength plain concrete, and there are problems such as high brittleness, low bending and tensile strength, and sudden failure. Using a flexible grid as reinforcement material, uniaxial compression, tensile, and shear tests of a flexible grid filling body were carried out, and the results were compared with the mechanical properties of the filling body without the flexible grid. We drew the following main conclusions: the uniaxial compressive strength of the flexible grid filling body gradually increased with the decrease in the grid spacing (the increase in the grid density); the grid dimension had little effect on the uniaxial compressive strength of the flexible grid filling body. The uniaxial tensile strength and shear strength of the flexible grid filling body increased with the increase in the grid dimension; and they first increased and then decreased with the increase in the grid spacing, and there was an optimal grid spacing. From the perspective of the macroscopic failure mode, the flexible grid filling body specimen after the uniaxial compression test had a conjugate shear failure, forming a “dumbbell shape” with two large ends and a small middle. After the uniaxial tensile test, the macroscopic failure mode of the specimen was tensile failure. After the shear test, the macroscopic failure mode of the specimen was shear slip failure. It is proposed that the tensile strength, shear strength, cohesion, and internal friction angle strengthening coefficients of the flexible grid filling body with different dimensions and spacing are higher than the elastic modulus strengthening coefficients. The experimental results can provide a certain reference and guidance for mine filling.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Properties of a Flexible Grid Filling Body

Liu

Chen

et al. 2023

Applied Sciences

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A Solution‐Processable High‐Modulus Crystalline Artificial Solid Electrolyte Interphase for Practical Lithium Metal Batteries

Seo

Song

et al. 2022

Advanced Energy Materials

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Particularly, the issue originates from the high reactivity of Li metal and thus continuous parasitic reactions between Li and electrolyte components that finally result in a poorly passivating layer, known as solid-electrolyte interphase (SEI). [3][4][5][6] Generally, the native SEIs in conventional/ commercial carbonate electrolytes are mechanically brittle, heterogeneous in ionic conduction, and fail to passivate the Li surface during long-term cycling.To solve these issues associated with Li metal anodes, several strategies have been proposed, such as liquid electrolyte engineering, [7][8][9][10][11][12][13][14] solid-state electrolytes, [15][16][17][18] Li metal hosts, [5,19] or pretreatment of Li metal. [20][21][22] Artificial SEIs (ASEIs) [23][24][25][26][27][28] have garnered increasing attention due to their potential compatibility with commercial electrolytes [24] and the possibility for scalable manufacturing. [23] Particularly, it is critical to develop production-friendly solution-processable ASEIs for Li metal anodes, so that the ASEIs can be implemented through scalable coating methods, [29] such as spray coating, slot-die coating, gravure coating, or inkjet printing.In addition to the aforementioned practical considerations, the physical and chemical properties of ASEIs can be rationally designed to overcome the drawbacks of native SEIs. Several key features of ASEIs have been identified as essential to protect Li metal anode, [4,28,[30][31][32][33][34] such as high ionic conductivity,The solid electrolyte interphase (SEI) has been identified as a key challenge for Li metal anodes. The brittle and inhomogeneous native SEI generated by parasitic reactions between Li and liquid electrolytes can devastate battery performance; therefore, artificial SEIs (ASEIs) have been proposed as an effective strategy to replace native SEIs. Herein, as a collaboration between academia and industrial R&D teams, a multifunctional (crystalline, high modulus, and robust, Li + ion conductive, electrolyte-blocking, and solution processable) ASEI material, LiAl-FBD (where "FBD" refers to 2,2,3,3-tetrafluoro-1,4-butanediol), for improving Li metal battery performance is designed and synthesized. The LiAl-FBD crystal structure consists of Al 3+ ions bridged by FBD 2ligands to form anion clusters while Li + ions are loosely bound at the periphery, enabling an Li + ion conductivity of 9.4 × 10 -6 S cm -1 . The fluorinated, short ligands endow LiAl-FBD with electrolyte phobicity and high modulus. The ASEI is found to prevent side reactions and extend the cycle life of Li metal electrodes. Specifically, pairing LiAl-FBD coated 50 µm thick Li with industrial 3.5 mAh cm -2 NMC811 cathode and 2.8 µL mAh -1 lean electrolyte, the Li metal full cells show superior cycle life compared to bare ones, achieving 250 cycles at 1 mA cm -2 .

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Mechanical Properties and Deterioration Instability of Filling Body with Gangue-Cement Material Based on AE Experiment

Cited by 2 publications

References 45 publications

Experimental Study of the Mechanical Properties of a Flexible Grid Filling Body

Experimental Study of the Mechanical Properties of a Flexible Grid Filling Body

A Solution‐Processable High‐Modulus Crystalline Artificial Solid Electrolyte Interphase for Practical Lithium Metal Batteries

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