The Strength, Permeability, and Microstructure of Cement–Bentonite Cut-Off Walls Enhanced by Polypropylene Fiber

Sustainability, Год журнала: 2025, Номер 17(8), С. 3656 - 3656

Опубликована: Апрель 18, 2025

Cement–bentonite cut-off walls are widely used in geoenvironmental engineering such as landfill liners and contaminated site remediation, due to their low permeability structural stability. However, excessive cement use reduces the swelling capacity of bentonite increases environmental burdens. This study proposes incorporating polypropylene fibers (PPFs) into cement–bentonite improve performance under lower dosages. A total 16 formulations were tested with different fiber contents. Unconfined compressive strength (UCS), direct shear, falling head tests conducted over 7, 14, 28 days, respectively. Microstructural changes examined using X-ray diffraction (XRD) scanning electron microscopy (SEM). The results showed that compared conventional high-cement mixture without fibers, a formulation moderate content 2% PPF achieved higher strength, comparable shear significantly permeability. analysis confirmed addition enhanced hydration preserved bentonite, forming compact microstructure reduced porosity. Furthermore, cost carbon emission analyses revealed above optimized both material embodied by approximately 12.5% 22.3%. These findings provide sustainable cost-effective approach mechanical hydraulic walls.

Язык: Английский

Fabrication of eco-friendly mine backfill materials using lead smelting-granulated blast furnace slag-based binder and aeolian sand: Heavy metal leaching behavior and performance design

Construction and Building Materials, Год журнала: 2025, Номер 483, С. 141655 - 141655

Опубликована: Май 13, 2025

Язык: Английский

Evaluating the co-control potential of CO2 and air pollutant emission reductions in the cement industry in China: A case in Henan

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 145912 - 145912

Опубликована: Июнь 1, 2025

Язык: Английский