Experimental study on the dynamic mechanical properties of polypropylene fibre-reinforced coal gangue-cemented backfill

Construction and Building Materials, Год журнала: 2025, Номер 459, С. 139843 - 139843

Опубликована: Янв. 1, 2025

Язык: Английский

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Experimental assessment on the dynamic mechanical characteristics and cracking mechanism of hybrid basalt-sisal fiber reinforced concrete

Journal of Building Engineering, Год журнала: 2024, Номер 88, С. 109151 - 109151

Опубликована: Март 26, 2024

Язык: Английский

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Experimental study on the flexural fatigue performance of slag/fly ash geopolymer concrete reinforced with modified basalt and PVA hybrid fibers

Journal of Building Engineering, Год журнала: 2024, Номер 94, С. 109917 - 109917

Опубликована: Июнь 13, 2024

Язык: Английский

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Analyzing microscopic structure and macroscopic strength behavior of cement-based tail fills incorporating fiber by X-ray CT scanning technique

Construction and Building Materials, Год журнала: 2024, Номер 440, С. 137453 - 137453

Опубликована: Июль 13, 2024

Язык: Английский

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The reinforcement mechanism of basalt and polypropylene fibers on the strength, toughness and crack resistance of tailing mortar

Construction and Building Materials, Год журнала: 2024, Номер 419, С. 135531 - 135531

Опубликована: Фев. 26, 2024

Язык: Английский

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Polypropylene Fiber’s Effect on the Features of Combined Cement-Based Tailing Backfill: Micro- and Macroscopic Aspects

Minerals, Год журнала: 2024, Номер 14(3), С. 212 - 212

Опубликована: Фев. 20, 2024

In undercut-and-fill mining, backfills show weak tensile strength and poor ductility properties since they act as artificial pillars to support stope roofs. Hence, the enhancement of stability mining structures is a crucial requisite for underground backfill operations. This study addresses reinforcing effect polypropylene (PP) on features combined cement-based tailing (CCTB) with varied cement/tail ratios (c/t: 1:8 1:4) at both macroscopic microscopic levels. Fill specimens containing fixed solid content 70 wt% were reinforced fiber (0.6 wt%) no (classified reference sample). They then cast in mold sizes 160 × 40 mm3, cured 7 days. Following curing, some experiments covering three-point bending assisted by DIC SEM performed inspect microstructure CCTB. The results illustrate that flexural fiber-oriented CCTB increases along c/t fraction, but it not greater than high fraction without fiber. Adding PP fiber, peak deflection was improved, increment increased linearly rising enhancing CCTB’s characteristics. damage starts from bottom middle, main cause stress distribution lowest section. addition CCTBs ability dissipate energy, which helps hinder crack extension prevent brittle occurring. shows AFt CSH key hydrate materials As result, this develops security determine its design safe production inputs sustainable filling

Язык: Английский

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Enhancing bending performance of cemented lithium feldspar tailings backfill with 3D printing polymer lattices: effects of unit shapes and materials

Case Studies in Construction Materials, Год журнала: 2025, Номер unknown, С. e04463 - e04463

Опубликована: Март 1, 2025

Язык: Английский

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Mechanical behavior and microscopic mechanism of synergistically enhanced cemented ultra-fine tailings backfill with polypropylene fiber and silica fume

Construction and Building Materials, Год журнала: 2024, Номер 443, С. 137668 - 137668

Опубликована: Авг. 8, 2024

Язык: Английский

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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

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Microstructural evolution and strengthening mechanism of aligned steel fiber cement-based tail backfills exposed to electromagnetic induction

International Journal of Minerals Metallurgy and Materials, Год журнала: 2024, Номер 31(11), С. 2390 - 2403

Опубликована: Сен. 20, 2024

Язык: Английский

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