Influence of basalt fiber on pore structure, mechanical performance and damage evolution of cemented tailings backfill

Journal of Materials Research and Technology, Год журнала: 2023, Номер 27, С. 5227 - 5242

Опубликована: Ноя. 1, 2023

To study the influence of addition basalt fibers on mechanical properties, pore structure, and damage evolution characteristics cemented tailings backfill (CTB), uniaxial compression tests, nuclear magnetic resonance tests scanning electron microscopy analysis were conducted CTB with four different content lengths fibers. Test results show following. (1) An increase in will lead to an proportion micropores secondary pores CTB, while a decrease macropores. The fiber length structure is not as significant content. (2) With length, peak stress strain increase, but elastic modulus decreases. Basalt can significantly improve ductility bearing time 12 mm 1.5 % having best effect. affects macroscopic mechanics more than (3) without have fewer cracks faster crack propagation speed, slower speed. mainly play bridging role between hydration products, delaying failure process sample. (4) A constitutive model was constructed. rationality reliability verified, law analyzed. positive impact evolution.

Язык: Английский

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Experimental study on the water and heat dynamic characteristics of silty clay at different depths under temperature gradient

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 57, С. 104366 - 104366

Опубликована: Апрель 8, 2024

Soil properties play a crucial role in the stability of engineering foundations, particularly cold regions where temperature gradients impact water migration and soil conditions. This study utilized MRI-Cryogenic Soil-Moisture Analyzer (MRI-CSMA) to conduct indoor freeze-thaw experiments on silty clay specimens with varying initial contents (12.0 %, 16.8 21.1 %). Dynamic changes content at different depths were analyzed. The results revealed distinct stage decrease characteristics both as freezing progressed, more pronounced closer end. Conversely, during thawing, temperatures gradually increased boundary rose. Notably, after cycle, frozen zone consistently retained higher than unfrozen zone, indicating redistribution, regardless levels. Furthermore, three samples contents, flux layer decreased exponentially time increased. phenomenon can be attributed combined effects conditions, gradients, structure freezing. These findings are likely have significant implications for understanding water-heat dynamics region soils well ensuring projects.

Язык: Английский

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The roles of microstructure and water mobility in pre-Darcy flow formation in saturated clay soil

Journal of Hydrology, Год журнала: 2024, Номер 631, С. 130826 - 130826

Опубликована: Фев. 2, 2024

Язык: Английский

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Moisture migration inference and calculation along the muddy clay column under unidirectional freezing based on LF-NMR

Cold Regions Science and Technology, Год журнала: 2023, Номер 215, С. 103985 - 103985

Опубликована: Авг. 22, 2023

Язык: Английский

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Freeze-thaw effects on pore structure of clay by 3D X-ray computed tomography and mercury intrusion porosimetry

Cold Regions Science and Technology, Год журнала: 2024, Номер 225, С. 104276 - 104276

Опубликована: Июль 15, 2024

Язык: Английский

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Analytical solution of steady-state temperature field of arc-shaped three-pipe liquid nitrogen freezing under adiabatic boundary condition

Cold Regions Science and Technology, Год журнала: 2025, Номер 231, С. 104421 - 104421

Опубликована: Янв. 6, 2025

Язык: Английский

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Evolution law and calculation model of closure time in artificial ground freezing

Tunnelling and Underground Space Technology, Год журнала: 2025, Номер 157, С. 106358 - 106358

Опубликована: Янв. 10, 2025

Язык: Английский

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Experimental research on the moisture water evaporation and heat transfer in the sand filler developing the thermal accumulation technologies

Journal of Energy Storage, Год журнала: 2025, Номер 112, С. 115539 - 115539

Опубликована: Янв. 28, 2025

Язык: Английский

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Basal scouring in historical rammed earth sites: formation and height prediction

Опубликована: Фев. 11, 2025

Язык: Английский

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Concurrent measurement of two-dimensional moisture and temperature distributions and other key quantities in stored biomass through integrated capacitive and acoustic tomography

Measurement, Год журнала: 2025, Номер unknown, С. 117229 - 117229

Опубликована: Март 1, 2025

Язык: Английский

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