Microstructure evolution and mechanical behavior of foamed cement-based tail backfills under varying fiber types and concentrations

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(39), С. 52181 - 52197

Опубликована: Авг. 14, 2024

Язык: Английский

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Influence of alkaline agents with different contents on strength features, energy dissipation and microscopic behavior of cement-based high‑sulfur tailings fill

Powder Technology, Год журнала: 2024, Номер 444, С. 120042 - 120042

Опубликована: Июль 3, 2024

Язык: Английский

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Use of Submarine Tailings Disposal as Alternative Tailings Management System

Minerals, Год журнала: 2024, Номер 14(7), С. 674 - 674

Опубликована: Июнь 28, 2024

The importance of the mining/milling industry in increasing growth level and welfare countries is quite high. However, at end processes, huge amounts waste (often known as tails) are inevitably produced that have no economic value can even be considered dangerous due to some heavy metals they contain. These tails highly problematic both their volume (difficult manage environmentally) toxicity (potential cause acid/leach waters) need handled outside existing disposal methods. This article presents effective sustainable handling application resulting from enrichment copper–zinc ores, which actively engaged metallic mining activities northeast Türkiye, with submarine (STD) method. In operation under study, (~55–60 wt.%) employed underground fill, though residual part disposed by STD characterization ore beneficiation tails, transportation subsea via a pipeline system, discharge monitoring results detailed present investigation. According limitations indicated Turkish Control Water Contamination regulation, concentration Pb-Cu found was allowable limit 0.05 mg/L. allowed 2 mg/L for Zn not surpassed mainly collected samples. pH values were almost above > 5. reveal technique works well an integrated mine method study.

Язык: Английский

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Clean and high-value recycling approach for waste concrete powder: Mechano-chemical activation of pozzolanic activity

Powder Technology, Год журнала: 2025, Номер unknown, С. 120988 - 120988

Опубликована: Март 1, 2025

Язык: Английский

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Utilization of waste rock from a low-carbon perspective: Mechanical performance analysis of waste rock-cemented tailings backfill

Journal of CO2 Utilization, Год журнала: 2025, Номер 94, С. 103058 - 103058

Опубликована: Март 5, 2025

Язык: Английский

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Recent advances of energetic valorization technologies for waste tires: A systematic review of thermochemical and integrated processes, challenges, and future directions

Renewable and Sustainable Energy Reviews, Год журнала: 2025, Номер 218, С. 115800 - 115800

Опубликована: Май 6, 2025

Язык: Английский

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A comparative study of wet-mix vs. dry-mix to prepare geopolymer artificial aggregates utilizing municipal solid waste incineration bottom ash (IBA) via crushing technique

Journal of Building Engineering, Год журнала: 2024, Номер 96, С. 110538 - 110538

Опубликована: Авг. 23, 2024

Язык: Английский

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Effect of bacteria-fly-ash based binder on cemented tailings backfill: Mechanical strength, solidified mechanism and economic benefits

Construction and Building Materials, Год журнала: 2024, Номер 448, С. 138292 - 138292

Опубликована: Сен. 10, 2024

Язык: Английский

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Study on the effect of temperature on the reinforcement of tailings sand by microbial mineralization

Case Studies in Construction Materials, Год журнала: 2024, Номер 21, С. e03621 - e03621

Опубликована: Авг. 8, 2024

Currently, more attention is focused on the durability of microbial mineralization solidification sandy soil in high-temperature environments to enhance unconfined compressive strength (UCS), while with less emphasis immobilization effect heavy metals. Lead (Pb)-zinc(Zn) mining tailings (LZMT) has characteristics loose and release metal pollutants. This experiment, based curing technology, using LZMT as raw materials conduct experiments, temperature was evaluated by UCS fixation rate ions key indexes. Combined fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD), scanning electron microscope-energy dispersive (SEM-EDS), we revealed mechanism affecting LZMT. The results showed that during LZMT, Sporosarcina pasteurii mainly removed through electrostatic attraction precipitation reactions. Temperature had almost no impact solidifying specimens an initial increase then decrease trend. maximum at 125°C, reaching 1.53 MPa, which 47% higher than 50°C. study instructive for application field building materials.

Язык: Английский

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Microstructure evolution and mechanical behavior of foamed cement-based tail backfills under varying fiber types and concentrations

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Авг. 29, 2024

Industrial solid waste (mine tailings) management has emerged as the key universal ecological challenge a result of unceasing creation rising by-products. Employing tailings makes mine fill production economical and assists resolve disposal problems. Foamed cement-based backfill (FCTB) is consisting tailings, cement, water foaming agent. It provides certain advantages such lightweight, good fluidity, thermal insulation, yet relatively weak in strength. Additionally, FCTB’s strength properties can be intensely improved by adding fibers. A total 3 diverse fibers: polypropylene (PP), glass (G), basalt (B) well dodecyltrimethylammonium bromide (DTAB) agent were used to prepare fiber-reinforced foamed cementitious (FR-FCTB). The mechanical properties, energy evolution, ductility microstructure FR-FCTB elaborately investigated uniaxial compression tests (UCS) SEM. Laboratory findings demonstrates that reinforcing effect three fibers on FCTB specimens: > basalt. showed best features fiber content 0.3% was adopted FCTB. At this time, UCS performance reinforced FCTBs 0.85 MPa increased 18.1%. addition increase fill’s storage limit, slow down discharge elastic strain within backfill, enhance toughness. factor evaluates degree deterioration filling terms post-peak drop, with all values being greater than CTB. FR-FCTB’s chief hydration product C-S-H gel. Fiber’s bridging significantly rallies crack extension thus features. Lastly, study’s main results are instructive for industrial application metallic mines.

Язык: Английский

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