固体废弃物的机械性能和微观机制 基于固体废弃物的结合剂 固化石废弃物
Zimou Wang1,2, Junjie Yang1,2, Yalei Wu3,4
1College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
Scientific reports
|September 9, 2024
概括
这项研究开发了一种使用工业废物固化石废物的新型粘合剂,提供了一个可持续的解决方案. 新的粘合剂显著提高了石材废弃物的强度,满足了道路基板材料标准,性能优于传统水泥.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 废物管理 废物管理
背景情况:
- 石材行业的废物带来了大量的土地利用和安全挑战.
- 石头废物的高效和富有资源的利用对于可持续性至关重要.
- 开发用于废物固化的环保粘合剂是一个活跃的研究领域.
研究的目的:
- 开发一种新的粘合剂,CGF (碳化残留物,磨砂颗粒高炉渣,飞灰),用于凝固石废.
- 研究CGF固化石废的机械性能和反应机制.
- 评估利用工业固体废物用于石废物管理的可行性.
主要方法:
- 开发一种CGF粘合剂,其中包括碳化残留物 (CCR),磨砂颗粒高炉渣 (GGBS) 和飞灰 (FA).
- 使用开发的CGF粘合剂固化石废物.
- 通过未受限制的压力强度 (UCS) 测试来评估机械性能.
- 使用X射线衍射 (XRD) 和扫描电子显微镜与能量分散光谱 (SEM-EDS) 的反应机制的研究.
主要成果:
- CGF粘合剂有效地固化石废物,达到适用于道路基板材料的强度.
- 在7天和28天,CGF固化的石废物比水泥固化的样品呈现出更高的UCS.
- 在5%的粘合剂含量下,UCS值达到2.93 MPa (7天) 和4.42 MPa (28天),超过了水泥性能.
- 在CGF内部的活性反应产生凝产品 (C-S-H,C-A-H,C-A-S-H),通过凝固和填充增强强度.
结论:
- CGF粘合剂提供了一种可行,低成本和低碳的方法,用于巧妙地利用石材废物.
- 该研究表明,成功地"用废物处理废物",以实现有效的固体废物管理.
- 开发的方法符合路基材料标准,与水泥相比,提供更高的性能.
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