Influence of different aggregate characteristics on pervious concrete

Construction and Building Materials, Год журнала: 2025, Номер 460, С. 139789 - 139789

Опубликована: Янв. 1, 2025

Язык: Английский

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Experimental and numerical investigations of bending mechanical properties and fracture characteristics of cemented tailings-waste rock backfill under three-point bending

Construction and Building Materials, Год журнала: 2024, Номер 447, С. 138149 - 138149

Опубликована: Авг. 31, 2024

Язык: Английский

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Experimental and DEM analyses of type I fracture characteristics of waste rock aggregate reinforced cemented tailing backfill

Theoretical and Applied Fracture Mechanics, Год журнала: 2024, Номер unknown, С. 104764 - 104764

Опубликована: Ноя. 1, 2024

Язык: Английский

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Structural and microstructural behavior of novel 3DP-UHPFRC beam with discrete steel fibers and steel-FRP composite bar

Engineering Structures, Год журнала: 2025, Номер 327, С. 119641 - 119641

Опубликована: Янв. 10, 2025

Язык: Английский

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Investigation on the strain imaging method for cystoid macular edema using optical coherence tomography

Optics & Laser Technology, Год журнала: 2025, Номер 186, С. 112646 - 112646

Опубликована: Март 2, 2025

Язык: Английский

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Exploring Pore Structure Features, Crack Propagation and Failure Behavior of Fiber Reinforced Foam Tail Fill by CT Imaging and 3D Reconstruction

Minerals, Год журнала: 2025, Номер 15(4), С. 354 - 354

Опубликована: Март 28, 2025

Fiber-reinforced foam tail fill (FRFTF) has been widely investigated in the field of foamed backfill because its high strength and toughness. However, fiber enhancement damage mechanism FRFTF still need to be further explored. The pore crack growth particle structure distribution features three kinds basalt (B), polypropylene (PP), glass (G) fibers on were porosity, fracture, sphericity, fractal dimension quantitatively probed by X-ray micro-computed tomography combined with uniaxial compression (UCS) SEM, while spatial porosity fracture was analyzed 3D reconstruction technology. Laboratory findings demonstrate that increases from 1.46% 4.74% increase content 0.3% 0.9%. This is related weak adhesion between fiber. Adding blowing agents could well enhance morphology FRFTF, reduce number principal cracks trapped within specimens, maintain structure’s integrity. relationship FRFTF’s UCS value porosity/fracture closely nature quantity fibers, overall performance best among others. As quality shifts 0.9%, specimen’s adversely correlated porosity. In current study, internal connection FRFTFs are studied microscopically. combination macro-mechanical microscopic provides a new research idea for materials during implementation fully mechanized mining technology hard rock mines.

Язык: Английский

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Contribution to cemented body strength by crushed stone with different particle sizes and contents: insights from PFC3D simulations

Computational Particle Mechanics, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

Язык: Английский

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Visualization and quantification of pore structure in cement tailings waste rock composites using X-ray computed tomography and deep learning

Construction and Building Materials, Год журнала: 2025, Номер 476, С. 141341 - 141341

Опубликована: Апрель 15, 2025

Язык: Английский

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Fractal Characterization and NMR Analysis of Curing-Dependent Pore Structures in Cemented Tailings Waste RockBackfill

Fractal and Fractional, Год журнала: 2025, Номер 9(6), С. 367 - 367

Опубликована: Июнь 4, 2025

This study investigates the coupled effects of waste rock-to-tailings ratio (WTR) and curing temperature on pore structure mechanical performance cemented tailings rock backfill (CTRB). Four WTRs (6:4, 7:3, 8:2, 9:1) temperatures (20–50 °C) were tested. Low-field nuclear magnetic resonance (NMR) was used to characterize size distributions derive fractal dimensions (Da, Db, Dc) at micropore, mesopore, macropore scales. Uniaxial compressive strength (UCS) elastic modulus (E) also measured. The results reveal that (1) micropore complexity found be a key indicator structural refinement, while excessive led coarsening reduction. Da = 2.01 reaches its peak WTR 7:3 40 °C; (2) this condition, UCS E achieved 20.5 MPa 1260 MPa, increasing by 45% 38% over baseline (WTR 6:4, 20 °C); (3) when exceeded °C, dropped significantly (e.g., 1.51 50 °C for 7:3), indicating thermal over-curing coarsening; (4) correlation analysis showed strong negative relationships between total volume (R −0.87 δavs.UCS), positive 0.43). (5) multivariate regression models incorporating fractions, T2 relaxation times, predicted with R2 > 0.98; (6) hierarchical sensitivity follows order micro-, meso-, macropores. provides new insights into microstructure–mechanical relationship in CTRB offers theoretical practical basis design high-performance materials deep mining environments.

Язык: Английский

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Energy damage evolution and mesoscopic failure mechanism of cemented waste rock tailing backfill under axial compression

Structures, Год журнала: 2024, Номер 71, С. 108057 - 108057

Опубликована: Дек. 16, 2024

Язык: Английский

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