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通过3D打印聚合物晶格提高胶结尾矿充填体的拉伸性能：力学性能与微观结构研究

Enhancing Tensile Performance of Cemented Tailings Backfill Through 3D-Printed Polymer Lattices: Mechanical Properties and Microstructural Investigation.

作者信息

Huang Junzhou, Deng Lan, Gao Haotian, Wu Cai, Li Juan, Zhu Daopei

机构信息

School of Civil Engineering, Hubei Engineering University, Xiaogan 432000, China.

Hubei 9D Mapping and Design Co., Ltd., Xiaogan 432000, China.

出版信息

Materials (Basel). 2025 Jul 14;18(14):3314. doi: 10.3390/ma18143314.

DOI:10.3390/ma18143314
PMID:40731524
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12299915/
Abstract

This study presents an innovative solution to improve the mechanical performance of traditional cemented tailings backfill (CTB) by incorporating 3D-printed polymer lattice (3DPPL) reinforcements. We systematically investigated three distinct 3DPPL configurations (four-column FC, six-column SC, and cross-shaped CO) through comprehensive experimental methods including Brazilian splitting tests, digital image correlation (DIC), and scanning electron microscopy (SEM). The results show that the 3DPPL reinforcement significantly enhances the CTB's tensile properties, with the CO structure demonstrating the most substantial improvement-increasing the tensile strength by 85.6% (to 0.386 MPa) at a cement-to-tailings ratio of 1:8. The 3DPPL-modified CTB exhibited superior ductility and progressive failure characteristics, as evidenced by multi-stage load-deflection behavior and a significantly higher strain capacity (41.698-51.765%) compared to unreinforced specimens (2.504-4.841%). The reinforcement mechanism involved synergistic effects of macroscopic truss behavior and microscopic interfacial bonding, which effectively redistributed the stress and dissipated energy. This multi-scale approach successfully transforms CTB's failure mode from brittle to progressive while optimizing both strength and toughness, providing a promising advancement for mine backfill material design.

摘要

本研究提出了一种创新解决方案，通过加入3D打印聚合物晶格（3DPPL）增强材料来改善传统胶结尾矿充填体（CTB）的力学性能。我们通过包括巴西劈裂试验、数字图像相关（DIC）和扫描电子显微镜（SEM）在内的综合实验方法，系统地研究了三种不同的3DPPL构型（四柱FC、六柱SC和十字形CO）。结果表明，3DPPL增强材料显著提高了CTB的拉伸性能，其中CO结构表现出最显著的改善——在水泥与尾矿比为1:8时，抗拉强度提高了85.6%（达到0.386MPa）。3DPPL改性的CTB表现出优异的延展性和渐进破坏特性，多阶段荷载-挠度行为以及与未增强试件（2.504-4.841%）相比显著更高的应变能力（41.698-51.765%）证明了这一点。增强机制涉及宏观桁架行为和微观界面粘结的协同效应，有效地重新分配了应力并耗散了能量。这种多尺度方法成功地将CTB的破坏模式从脆性转变为渐进性，同时优化了强度和韧性，为矿山充填材料设计提供了一个有前景的进展。

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Sci Total Environ. 2024 Jan 15;908:168320. doi: 10.1016/j.scitotenv.2023.168320. Epub 2023 Nov 8.
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3D Printing in Regenerative Medicine: Technologies and Resources Utilized.3D 打印在再生医学中的应用：技术与资源利用
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A preliminary study of aeolian sand-cement-modified gasification slag-paste backfill: Fluidity, microstructure, and leaching risks.风成砂-水泥改性煤气化渣胶结充填料的初步研究：流变性、微观结构和浸出风险。
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Influence of Geometric and Manufacturing Parameters on the Compressive Behavior of 3D Printed Polymer Lattice Structures.几何和制造参数对3D打印聚合物晶格结构压缩行为的影响
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