地质聚合物CLSM与非规范的飞灰和底灰:一种可持续的方法来利用危险废物
Alexis K VanDomelen1, Ahmed A Gheni2, Eslam Gomaa1
1Department of Civil, Architectural & Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究开发了环保地质聚合物控制低强度材料 (CLSM),使用工业副产品,非规格飞灰 (OSFA) 和底灰 (BA). 地质聚合物CLSM为传统的CLSM提供了一个可持续的,具有成本效益的替代品.
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:
- 传统的控制低强度材料 (CLSM) 使用水泥,沙子和水.
- 非规范的飞灰 (OSFA) 和底灰 (BA) 是工业副产品,具有潜在的环境危害.
- 需要对传统的CLSM提供可持续的替代方案.
研究的目的:
- 开发使用OSFA和BA作为可持续替代品的环保地质聚合物CLSM.
- 评估地质聚合物CLSM的性能和成本效益.
- 评估危险工业副产品重新利用的潜力.
主要方法:
- 开发的两部分 (液体NaOH) 和一部分 (固体NaOH颗粒) 地质聚合物CLSM混合物.
- 使用OSFA作为水泥替代品和BA作为沙子替代品.
- 评估的流动性 (ASTM D6103-17) 和压力强度 (<300 psi).
- 进行了成本分析.
主要成果:
- 替代OSFA增加了水需求;替代BA造成了隔离问题.
- 由于OSFA的碳含量,两部分混合物需要调整水与飞灰的比率.
- 一天的压力强度在5至87psi之间.
- 与两部分混合物相比,单部分混合物显示了7天的压力强度降低 (1-34%),提高了挖掘能力.
- 增加BA-OSFA比率减少了水需求,但增加了NaOH/OSFA比率.
结论:
- 使用OSFA和BA的地质聚合物CLSM是一种可行的,可持续的替代传统CLSM.
- 这种方法重新利用危险的工业副产品,减轻环境风险.
- 地质聚合物CLSM提供了显著的成本降低 (高达94%) 和环境效益.
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