Research on Improving the Flexural Performance of Alkali-activated Geopolymer Cemented Coal Gangue Through Layered Addition of Fibers

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 96, P. 110549 - 110549

Published: Aug. 23, 2024

Language: Английский

---

Study on the mechanics performance and deformation characteristics of polypropylene fiber-reinforced solid waste-based fill material

Journal of Materials Science, Journal Year: 2025, Volume and Issue: 60(6), P. 3178 - 3199

Published: Jan. 23, 2025

Language: Английский

---

Multiscale study on the compressive performance of diverse solid waste backfill bodies

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Journal Year: 2025, Volume and Issue: 11(1)

Published: Jan. 16, 2025

To create green, low-energy self-compacting backfill materials, this study utilizes aeolian sand, slag, red mud, and calcium carbide slag to prepare diverse solid waste materials in synergy. Additionally, a suitable amount of polypropylene fibers is added enhance its toughness. During the experimental process, unconfined compressive strength tests were conducted using digital speckle technique. Computerized tomography scanning technology was employed for internal 3D visualization samples. Material difference mechanisms characterized SEM–EDS XRD microscopic techniques. Finally, discrete element numerical simulation utilized analyzing evolution sample failure. The results show that with increase doping, specimen UCS increases then decreases, when doping 14%, reaches local maximum 3.552 MPa; water–solid ratio, gradually ratio 0.3, minimum 3.26 MPa. With mass percentage calcium-silicon multi-solid matrix first increased decreased, micro-morphology included lamellar, block, rod structures; transformed, pore defects between cementitious increased. porosity within unit exceeds decreases; gradual increases, number holes 208 range 0.24. Digital technique PFC together elucidate sample's failure process crack mechanism. Initially, voids are compacted, propagation slow. As load peak, localized deformation macroscopic formation occur sample. After peak load, exhibits significant displacement deformation, cracks significantly. research findings can provide reference design construction pipelines trenches.

Language: Английский

---

Study on the mechanical properties and failure mechanism of polypropylene fiber–rubber-modified solid waste-based backfill

Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Language: Английский

---

Mechanical properties and compression damage characteristics of coal gangue-filled backfill cemented by fly ash modified self-consolidating grouts

Case Studies in Construction Materials, Journal Year: 2025, Volume and Issue: unknown, P. e04687 - e04687

Published: April 1, 2025

Language: Английский

---

Study on the compressive performance and numerical simulation of fiber-reinforced geopolymer stabilized aeolian sand subgrade materials

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 15, 2025

To enhance the compressive strength and toughness of geopolymer-stabilized aeolian sand subgrade materials, to promote utilization resources, polypropylene fibers are incorporated into geopolymer solidified materials. Unconfined tests conducted on specimens prepared under different mixing schemes. The formation mechanism fiber toughening crack resistance revealed at microscopic level using SEM (Scanning Electron Microscopy) technology. finite element numerical simulation software FLAC3D 6.0 is used establish a model highway, analyzing dynamic response maximum displacement materials various vehicle speeds in conditions optimal length amount fiber. Research results show that when NaOH content 1.5%, 0.5%, 12 mm, it constitutes mix ratio for specimen, with peak UCS (Unconfined Compressive Strength) residual reaching their values. Slag fly ash form three-dimensional topological network structure action alkaline solution, which promotes bonding between particles matrix. within matrix effectively inhibits dislocation suppresses development expansion cracks, playing key role enhancing specimen. Using software, was found road subbase material fiber-reinforced stabilized material, impact area significantly smaller than sand. research provide reference practical application engineering.

Language: Английский

---

Effect of freeze-thaw cycle on deterioration of mechanical properties of fibre-reinforced geopolymer cemented aeolian sand

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 452, P. 138943 - 138943

Published: Nov. 1, 2024

Language: Английский

---

Study on the compressive strength and failure mechanism of fiber-reinforced polymer green filling materials

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 452, P. 138990 - 138990

Published: Nov. 1, 2024

Language: Английский

---

Study on the rheological properties and compressive strength mechanism of geopolymer cementitious materials for solid waste

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 98, P. 111072 - 111072

Published: Oct. 15, 2024

Language: Английский

---

Effect of CO2 Nanobubble Water on the Fracture Properties of Cemented Backfill Materials under Different Aggregate Fractal Dimensions

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(17), P. 7792 - 7792

Published: Sept. 3, 2024

In order to cope with climate change and achieve the goal of carbon neutrality, use carbonization technology enhance performance cement-based materials purpose sequestration has become a very promising research direction. This paper considers CO2NBW as mixing water for materials, aiming improve efficiency neutrality. time, effect on cementitious filling under different aggregate fractal dimensions was studied through uniaxial compression tests acoustic emission technology. The mechanical properties crack evolution material discussed. results showed that CO2 nanobubbles significantly improved strength cemented dimensions, compressive most by 23.04% when dimension 2.7824. addition, characteristics ring counts energy parameters indicate help overall pore structure sample, affecting macroscopic strength. However, addition reduces limit storage ratio elastic strain energy, which indicates excessive concentration may affect hydration reaction cementing material.

Language: Английский

---