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• W4313443457 endingPage "130186" @default.
• W4313443457 startingPage "130186" @default.
• W4313443457 abstract "Locally fiber-reinforced layered cemented paste backfill (FR-LCPB) were prepared for three-point bending experiments to examine the influence of fiber content and reinforcement position on its fracture resistance properties, in an effort to reduce the significant demand for cement during mine filling and improve the characteristics of the CPB brittle damage. Further, scanning electron microscopy (SEM) and PFC 3D numerical simulation were used to investigate the failure mode of FR-LCPB and the reinforcement mechanism of fibers. The results demonstrated that the addition of fibers significantly affects the FR-LCPB's fracture resistance, with 0.6% being the ideal fiber content. Flexural strength, peak deflection, and bending modulus of FR-LCPB increase with the decrease of the distance between the fiber reinforcement position and the lower layer. Additionally, the addition of fibers enhances the CPB's brittle damage characteristic, ensuring that it retains some strength even after failing. It is primarily due to the fibers' ability to deform and rub against the surrounding matrix while resisting the external load that FR-LCPB retains its strength even after damage. PFC 3D simulation results demonstrated that FR-LCPB damage exhibits hysteresis. FR-LCPB breaks down in the fiber-containing layer after first cracking through the non-fiber layer during the loading process, which differs from the damage pattern of regular layered CPB and further suggests that the fiber has an inhibitory effect on the FR-LCPB's fracture. The outcomes will serve as a guide for low-carbon mining development and safe mining operations." @default.
• W4313443457 created "2023-01-06" @default.
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• W4313443457 date "2023-02-01" @default.
• W4313443457 modified "2023-10-12" @default.
• W4313443457 title "Research on fracture behavior and reinforcement mechanism of fiber-reinforced locally layered backfill: Experiments and models" @default.
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• W4313443457 doi "https://doi.org/10.1016/j.conbuildmat.2022.130186" @default.
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