Behavior of CFRP-Confined Sand-Based Material Columns under Axial Compression

Li, Guodong; Liu, Honglin; Deng, Wentao; Wang, Hongzhi; Yan, Haitian

doi:10.3390/polym13223994

Cited by 4 publications

(4 citation statements)

References 47 publications

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“…Previous studies have shown that the water–cement ratio and the content of impurities influence HWBMs [ 32 , 33 ]. Guodong Li et al [ 34 , 35 ] used the HWBM from Yangzhou China Mining Construction New Material Technology Co., Ltd. (Yangzhou, China), selected the water–cement ratio of the HWBM to be 1, 1.5 and 2, set the desert sand doping amount to be 0, 30%, and 60%, and made seven types of desert sand-based filling material samples. Through a series of tests, the influence of desert sand-based backfill material on its initial setting time, mechanical properties, microstructure, and the effect of water–cement ratio on the performance of HWBM was studied.…”

Section: Experimental Studymentioning

confidence: 99%

“…This material has a high slurry volume after adding water, enabling the desert sand to be better embedded in it. From the microstructure, it can also be seen that when high content of desert sand is added, the compactness of the desert sand-based backfill material is more compact [ 34 ]. Therefore, the high content of desert sand can effectively improve the compressive strength of desert sand-based backfill materials.…”

Section: Analysis Of Influencing Factorsmentioning

confidence: 99%

“…Previous studies have shown that the water-cement ratio and the content of impurities influence HWBMs [32,33]. Guodong Li et al [34,35] used the HWBM from Yangzhou China Mining Construction New Material Technology Co., Ltd. (Yangzhou, China), selected the water-cement ratio of the HWBM to be 1, 1.5 and 2, set the desert sand doping amount to be 0, 30%, and 60%, and made seven types of desert sand-based filling material samples.…”

Section: Experimental Studymentioning

confidence: 99%

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Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Yan

Liu

et al. 2023

Materials

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As a key node in the promotion of the “Western Development” strategy in Xinjiang, China, the large-scale mining of coal resources is bound to cause a series of ecological and environmental problems, such as surface subsidence. Desert areas are widely distributed in Xinjiang, and from the perspective of reserves and sustainable development, it is crucial to fully utilize desert sand to make filling materials and predict its mechanical strength. In order to promote the application of High Water Backfill Material (HWBM) in mining engineering, a modified HWBM doped with Xinjiang Kumutage desert sand was used to prepare a desert sand-based backfill material, and its mechanical properties were tested. The discrete element particle flow software PFC3D is used to construct a three-dimensional numerical model of desert sand-based backfill material. The parameters such as sample sand content, porosity, desert sand particle size distribution, and model size are changed to study their impact on the bearing performance and scale effect of desert sand-based backfill materials. The results indicate that a higher content of desert sand can effectively improve the mechanical properties of HWBM specimens. The stress–strain relationship inverted by the numerical model is highly consistent with the measured results of desert sand-based backfill materials. Improving the particle size distribution of desert sand and reducing the porosity of filling materials within a certain range can significantly improve the bearing capacity of desert sand-based backfill materials. The influence of changing the range of microscopic parameters on the compressive strength of desert sand-based backfill materials was analyzed. This study provides a desert sand-based backfill material that meets the requirements of mine filling, and predicts its strength through numerical simulation.

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Section: Experimental Studymentioning

confidence: 99%

Section: Analysis Of Influencing Factorsmentioning

confidence: 99%

Section: Experimental Studymentioning

confidence: 99%

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Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Yan

Liu

et al. 2023

Materials

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“…(2) despite the high content of water, the high-water backfill material is necessary in large quantities [31]; (3) due to the low strength of the backfill body, doping massive cementitious materials enhances the strength [32]. As is well known, aeolian sand extensively occurs on the ground surface in Northwestern China.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aeolian Sand and Water−Cement Ratio on Performance of a Novel Mine Backfill Material

Wang

Liu

et al. 2022

Sustainability

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The gob-side entry retaining (GER) technique, as the family member of the pillarless coal mining system, is becoming popular, mainly attributed to its high resource recovery rate and significant environmental benefits. Seeking cost-effective backfill material to develop the roadside backfilling body (RBB) is generally a hot topic for coal operators and scholars. Except for its relatively high cost, the other shortcoming of the widely used high-water backfill material is also obvious when used in arid, semi-arid deserts or Gobi mining areas lacking water. The modified high-water backfill material (MBM) mixed with aeolian sand was recently developed as an alternative to conventional backfill materials. Some critical parameters affecting both the physical and mechanical properties of the MBM, including the amount of the aeolian sand and water-to-powder ratio of the high water-content material, have been experimentally investigated in the present research. Test results showed that the MBM featured high early strength and bearing capability after a large post-peak deformation. In particular, the adjustable setting time of the MBM through changing the amount of sand widens its application in practice. Unlike the high-water backfill material, the MBM is a typical elastoplastic material; the stress-strain curves consist of pore compression, elastic deformation, yielding, and total failure. Note that both the peak and residual strength of the MBM increased as the doping amount of aeolian sand increased, which is probably because of the impacted aeolian sand and the uniform reticular structure of the ettringite in the MBM. Compared with the high-water backfill material, only limited cementitious material and water resources are requested to cast the RBB, which provides more economical and environmental benefits for the application of the GER technique in the arid, semi-arid deserts or the Gobi mining areas.

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Failure evolution and instability prediction of fiber-reinforced polymer-confined cement mortar specimens under axial compression

Li,

Bai,

Han

et al. 2024

Environ Sci Pollut Res

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Behavior of CFRP-Confined Sand-Based Material Columns under Axial Compression

Cited by 4 publications

References 47 publications

Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Effects of Aeolian Sand and Water−Cement Ratio on Performance of a Novel Mine Backfill Material

Failure evolution and instability prediction of fiber-reinforced polymer-confined cement mortar specimens under axial compression

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