Mar 21, 2022 · To explore the mechanical properties and energy evolution law of layered cemented paste backfill (LCPB), LCPB specimens layer numbers of 1, 2, 3 and 4 were made, and triaxial compression tests with confining pressures of 0, 0.2, 0.5 and 0.8 MPa were carried out.

Jan 2, 2025 · In this study, the spatial distribution of the mechanical strength of ultra-fine tailings cemented paste backfill (UCPB) in underground stopes was examined, and the micro-mechanism...

Jan 17, 2018 · This paper deals with cemented paste backfill (CPB), which is prepared by mixing tailings with cement and water to obtain a desired density. CPB typically contains at least 15% of grains finer than 20 μm (Sivakugan et al. 2006) in order to sustain water in the soil matrix.

Mar 17, 2025 · Fiber-reinforced cemented paste backfill (FRB), a composite material incorporating fibers and cement into mine tailings, is extensively utilized in mine backfilling to ensure underground excavation stability. The triaxial mechanical properties and behavior of FRB, …

Mar 27, 2025 · Study on the mechanics and permeability characteristics of cemented backfill with different mineral admixtures

Apr 5, 2024 · The mechanical properties of cemented paste backfill (CPB) directly determine the effect of backfilling in coal mining. However, the current studies on the mechanical properties of CPB are all based on standard cylinder or cube specimens, which cannot accurately …

Jul 25, 2024 · This study focused on investigating the damage development mode and strength prediction model of layered cemented paste backfill (LCPB) using digital image correlation (DIC) and ultrasonic pulse velocity (UPV).

Dec 25, 2022 · Mechanical characterization is important to the design and analysis of cemented paste backfill (CPB) structures. Unconfined compressive strength (UCS) tests have been widely used owing to their relative simplicity to characterize a material’s response to unconfined …

Jul 1, 2024 · The adhesion between straw fiber and mortar matrix constitutes a pivotal factor in improving the integration of backfill, whereas steel slag contributes to improving the mechanical properties by enhancing the distribution of void structures within the backfill.

It is shown that there is strong correlation between the two different slump test devices used in this study. The smaller cylindrical device appears to have good potential for slurries like mine tailings or dredged mud that have high water content for slump test.

The results show the following: (1) The uniaxial compressive strength of CPB specimens exhibits an upward trend with the increase of cement content and curing age. When the cement content is high, the uniaxial compressive strength increases sharply with increasing curing age.

Jan 6, 2022 · Generally, the cemented paste backfill (CPB) is an engineered mixture of tailings, water, and hydraulic binders (2–9% by weight). It contains typically between 65 and 85% solids (Ercikdi et al., 2014; Cao et al., 2021).

Feb 6, 2024 · Cement paste backfill (CPB) suffers serious damage and deterioration under the dual erosion conditions of the dry–wet cycle caused by the high chloride salt concentration in mine water and the fluctuation of mine water level.

The bagged fly ash has multiple important roles in this test: first, it can replace part of the cement in the cemented paste backfill of the tailings, which can significantly reduce the cost of the filling materials, realize the efficient recycling of resources and the regeneration of wastes, and meet …

Feb 27, 2023 · Cemented paste backfill technology can fill underground mining areas and prevent surface subsidence, greatly improving the safety of mining operations and the recovery of minerals [4].

May 15, 2023 · Considering the reliability (ground reinforcement), functionality (storage of tailings into underground mined-out stopes), and productivity of mining operations, cemented mine/paste backfill (CMB/CPB) has known as the most efficient tailings treatment method among others …

Apr 22, 2024 · In the backfill mining method, cement paste backfill (CPB) is a crucial and permanent component within the underground mining area. Its mechanical properties and stability are paramount for controlling ground pressure during the extraction process and maintaining …

Jan 10, 2023 · In order to make full use of the synergistic cementing effect among multi-source solid wastes, cemented paste backfills (CPB) were prepared with iron tailings as the aggregate, FA and GGBS composed as the binder, soda residue (SR) and calcium carbide slag (CS) …

21 hours ago · This paper evaluates the mechanical and durability properties of cement paste—a key component of paving blocks—incorporating OWA at replacement levels of 0, 5, 10, 15, and 20%, with a constant water-to-cementitious ratio of 0.45.

There has been limited investigation into the performance of modified iron-biochar materials derived from sludge as components in cement composites, and a lack of analysis concerning their effects and interactions with the hydration kinetics of cement products.