挖掘废料泥的强度和透性能与三元工业副产品稳定
Jiaxin Deng1, Dong Zhang2, Huihui Yuan1
1Changzhou Architectural Research Institute Group Co., Ltd., Changzhou, 213015, China.
Scientific reports
|August 11, 2025
概括
这项研究介绍了一种可持续的方法,用于使用工业副产品固化挖掘泥,如磨砂颗粒高炉,钢和脱硫石膏. 与普通波特兰水泥相比,优化的混合物显著提高了土壤的强度,并大大降低了透性.
科学领域:
- 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.
- 环境工程 环境工程
背景情况:
- 挖掘后的泥土会给处置带来挑战,并且需要有效的固化才能重复使用.
- 提高固化土壤的强度和降低其透率对于其应用至关重要.
- 工业副产品为传统的水泥材料提供了一个可持续的替代品.
研究的目的:
- 开发和优化使用工业副产品挖掘泥土的可持续固化方法.
- 评估固化的土壤的机械性能 (强度,透性).
- 调查负责增强性能的微观结构机制.
主要方法:
- 通过极端顶点混合物设计,优化基于三元固体废物 (SWC) 的水泥材料,使用磨砂颗粒高炉渣 (GGBS),钢渣 (SS) 和脱硫石膏 (DG).
- 在7天和28天评估未受限制的压力强度 (UCS) 和透系数.
- 使用X射线衍射 (XRD),热重力测量分析 (TGA),扫描电子显微镜 (SEM) 和侵入孔径测量 (MIP) 的微结构分析.
主要成果:
- 优化的SWC混合物 (G60S30D10) 实现了28天的UCS3.22 MPa (105%高于OPC) 和透系数1.94 × 10−8 m/s (比OPC低一个数量级).
- 微观结构分析显示,乙化 (AFt) 含量增加 (22-83%高于OPC) 和密的C-(A) -S-H凝.
- 精细的孔隙结构,大孔 (>1微米) 从15% (OPC) 减少到2-3% (SWC),大大降低了透率.
结论:
- 开发的SWC提供了一种低碳,高效的解决方案,用于凝固挖掘泥,在强度和耐水性方面超过普通波特兰水泥.
- 增强的性能归因于膨胀的AFt晶体和密集的C-(A) -S-H凝填充毛孔结构的协同效应.
- 这种可持续的方法为在土木工程应用中利用工业副产品提供了宝贵的见解.
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