使用聚烯纤维和二氧化烟雾对煤回填充的机械和微结构增强
Ji Yang1, Xiangdong Zhang1, Qiang Zhao1
1School of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China; Key Laboratory of Ecological Restoration Technology in Abandoned Mining Area in Liaoning, Liaoning Technical University, Fuxin, 123000, China.
Environmental research
|August 9, 2025
概括
这项研究使用聚烯纤维 (PP) 和烟 (SF) 增强了基于煤的补充材料. 这种协同作用的添加显著提高了强度和峰值应变,为基于水泥的材料提供了一个环保的替代品.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 传统填充材料的脆性故障特性限制了它们的工程应用.
- 工业固体废物,如碳化物渣,煤粉和渣,为可持续材料开发提供了机会.
- 聚烯纤维 (PP) 和烟 (SF) 正在探索它们提高材料性能的潜力.
研究的目的:
- 开发一种新的协同增强策略,用于使用工业固体废物的煤基填充材料 (SGBS-PsFs).
- 研究聚烯纤维 (PP) 和烟 (SF) 对填充材料可加工性,机械性能和故障机制的影响.
- 为利用工业固体废物在工程应用中的环保水泥材料提供技术支持.
主要方法:
- 由碳化物渣激活的基于煤的回填材料 (SGBS-PsFs) 的制备,包含聚烯纤维 (PP) 和烟 (SF).
- 宏观测试分析可加工性,单轴压力强度 (UCS),分裂拉伸强度 (STS) 和峰值应变.
- 数字图像相关性,超深度显微镜和其他显微镜技术用于调查损伤机制和材料特性.
主要成果:
- 加入PP和SF与流动性有负相关性,过度添加会影响可加工性.
- 协同使用PP和SF显著增强UCS (37.94%),STS (42.26%) 和峰值应变 (47.17%).
- PP主要改进了STS,而SF改进了UCS;它们的协同作用促进了拉力到拉力剪切故障模式的过渡,并改善了断裂表面的特性.
结论:
- SF优化了矩阵密度和孔隙结构,增加了C-S-H凝含量和界面粘合.
- 联合使用PP和SF表现出协同合效应,提高了材料的整体性能.
- 这种新的填充材料通过降低成本和碳排放相比以水泥为基础的替代品提供了环境效益,为工程应用提供了可持续的解决方案.
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