Mechanical properties and damage evolution characteristics of waste tire steel fiber-modified cemented paste backfill

International Journal of Mining Science and Technology, Год журнала: 2024, Номер 34(7), С. 909 - 924

Опубликована: Июль 1, 2024

During the process of constructional backfill mining, cemented paste (CPB) typically exhibits a high degree brittleness and limited resistance to failure. In this study, mechanical damage evolution characteristics waste tire steel fiber (WTSF)-modified CPB were studied through uniaxial compression tests, acoustic emission (AE) scanning electron microscopy (SEM). The results showed that compressive strength (UCS) decreased when WTSF content was 0.5%, 1%, 1.5%. When reached UCS modified exhibited minimal decrease (0.37 MPa) compared without WTSF. 1.5%, peak strain WTSF-modified increased by 18%, 31.33%, 81.33%, while elastic modulus 21.31%, 26.21%, 45.42%, respectively. addition enhances activity AE events in CPB, resulting slower progression entire failure process. After failure, retained certain level load-bearing capacity. Generally, dominated tensile cracks. WTSF, gradual increase proportion cracks observed upon loading sample pore compaction stage. three-dimensional localization underwent progressive during loading, samples still good integrity after Additionally, response relationship between energy development analyzed, constitutive model with different contents constructed. This study provides theoretical basis for enhancement adding serving as valuable reference design backfill.

Язык: Английский

---

Improving mechanism for recycling efficiency of ceramic construction solid waste and properties of composite backfill based on aggregate particle size distribution

Construction and Building Materials, Год журнала: 2024, Номер 436, С. 136826 - 136826

Опубликована: Июнь 7, 2024

Язык: Английский

---

Dynamic impact performance of cemented tailings backfill in a water-bearing environment: Coupling effects and damage characteristics

Soil Dynamics and Earthquake Engineering, Год журнала: 2025, Номер 191, С. 109249 - 109249

Опубликована: Янв. 27, 2025

Язык: Английский

---

Acid reduction and corrosion resistance of alkaline full solid waste backfill based on oil shale residue

Environmental Research, Год журнала: 2025, Номер 273, С. 121216 - 121216

Опубликована: Фев. 26, 2025

Язык: Английский

---

Solid waste binder cemented dihydrate phosphogypsum aggregate to prepare backfill material

Minerals Engineering, Год журнала: 2025, Номер 226, С. 109249 - 109249

Опубликована: Март 15, 2025

Язык: Английский

---

Adding silica fume and calcium carbide residue to enhance the performance of β-hemihydrate phosphogypsum for backfill mining

Construction and Building Materials, Год журнала: 2025, Номер 467, С. 140420 - 140420

Опубликована: Фев. 13, 2025

Язык: Английский

---

Flexural properties and damage evolution laws of scrap tire steel fiber-reinforced constructional backfill body

Journal of Building Engineering, Год журнала: 2025, Номер unknown, С. 112700 - 112700

Опубликована: Апрель 1, 2025

Язык: Английский

---

Deterioration of mechanical properties and damage mechanism of flue gas desulfurization gypsum backfill under long-term erosion of chloride salt solution

Physics of Fluids, Год журнала: 2024, Номер 36(3)

Опубликована: Март 1, 2024

Flue gas desulfurization gypsum (FGDG), a solid waste material generated by power plants, offers cost-effective solution for preparing backfill materials. Concurrently, given that most materials are exposed to mine water erosion, an investigation into the mechanical performance degradation and damage mechanisms of FGDG subjected prolonged chloride salt erosion is crucial ensuring stability goaf backfills (by goaf, we mean area or space remains underground after extraction valuable minerals). This study explores properties samples treated with varying concentrations chloride. The findings indicate over time, mass sample initially decreases, experiences slight increase, then gradually declines. Simultaneously, strength structure deteriorate rapidly, followed partial recovery. rebound in attributed incomplete hydration reaction continuously transforms free bound water. Microstructure analysis techniques, such as X-ray diffraction (XRD) field-emission scanning electron microscopy (FE-SEM), reveals consequence erosion. Subsequent reuse facilitated formation Friedel's resulting from between products ions, filling voids impeding further ion deeper regions. Notably, exhibits outstanding high-concentration environments. serves reference understanding deterioration mechanism practical application chloride-rich

Язык: Английский

---

Effects of carbide slag on the performance of phosphogypsum backfill paste

Journal of Material Cycles and Waste Management, Год журнала: 2024, Номер 26(5), С. 3073 - 3088

Опубликована: Июль 17, 2024

Язык: Английский

---

Investigation on structure stability and damage mechanism of cemented paste backfill under the coupling effect of water-static load

Alexandria Engineering Journal, Год журнала: 2024, Номер 112, С. 307 - 318

Опубликована: Ноя. 6, 2024

Язык: Английский

---