研究EPS轻质土壤与灰混合的机械性能
Lifang Mei1,2, Yiwen Huang1,2, Dali Xiang1,2
1School of Civil Engineering, Architectural and Environment, Hubei University of Technology, Wuhan 430068, China.
Polymers
|January 8, 2025
概括
这项研究开发了使用飞作为部分水泥替代品的扩展聚乙烯 (EPS) 珠型轻质土壤复合材料. 结果表明,优化EPS含量和飞灰比例是保持在地质技术应用中不受限制的压力强度 (UCS) 的关键.
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
- 环境工程 环境工程
背景情况:
- 扩展聚钢 (EPS) 珠型轻质土壤复合材料提供了一种具有低密度和高强度的新型地质技术材料.
- 将飞灰作为部分水泥替代品纳入这些复合材料的目的是降低建筑成本和减轻环境污染.
- 这项研究探讨了与飞灰混合的EPS珠子轻质土壤的机械性能和故障机制.
研究的目的:
- 评估EPS珠子含量,整体固化剂含量和飞灰替代率对轻质土壤复合材料无限制压力 (UCS) 的影响.
- 确定符合工程性能要求的带有飞灰的EPS珠型轻质土壤的最佳混合比例.
- 分析这些新型地质技术材料在不同混合比率下的故障模式.
主要方法:
- 制备EPS珠-轻质土壤复合物,其中EPS珠含量不同 (0.5%-2%),总固化剂含量 (10%-25%) 和飞灰替换比率 (0%-60%).
- 进行无限制压力强度 (UCS) 测试,以评估开发的复合材料的机械性能.
- 使用扫描电子显微镜 (SEM) 检查轻质土壤的微观结构和故障机制.
主要成果:
- 轻质土壤复合材料的UCS受到EPS含量,总固化剂含量以及替代水泥的飞比例的显著影响.
- 随着EPS含量增加和总固化剂含量减少,UCS的含量下降,并且随着飞的比例增加,UCS的含量也下降.
- 当飞替换率保持在30%以下时,可以观察到最佳性能,满足工程需求,减少环境影响.
结论:
- 与飞混合的EPS珠轻质土壤提供了可行的可持续地质材料,前提是飞替代率得到合理控制 (建议<30%).
- 该研究确定了影响UCS的关键因素,并提供了与材料混合率相关的故障模式 (分裂,斜切割,凸出) 的见解.
- 这种方法有效地消耗了飞等工业副产品,有助于环境修复和降低建筑成本.
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