用石膏中和的红泥制备水泥糊补充的新策略:机械性能,水化机制和生产成本
Bin Liu1, Qinli Zhang1, Daolin Wang1
1School of Resources and Safety Engineering, Central South University, Changsha, 410083, China.
Journal of environmental management
|August 1, 2025
概括
这项研究引入了一种利用红泥 (RM) 和 (PG) 的新方法,通过制造P&R复合材料来填充水泥糊 (PR-CPB). 这种方法提高了废物利用率,改善了机械性能,并提供了显著的成本节约.
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:
- 红泥 (RM) 和石 (PG) 是危险的工业废物,由于它们的极端pH值,处置具有挑战性.
- 对RM和PG的有限利用选择阻碍了可持续的废物管理实践.
研究的目的:
- 开发一个环保的技术,利用RM和PG.
- 使用P&R复合材料 (中和RM和PG) 制备水泥糊补充剂 (PR-CPB).
- 研究P&R复合材料含量对PR-CPB的特性的影响.
主要方法:
- 准备具有不同P&R复合材料含量的PR-CPB标本.
- 宏观和微观实验分析 (例如,不受限制的压力强度,pH值测量,矿物相分析,微观结构调查).
- 成本效益分析比较PR-CPB与普通波特兰水泥 (OPC).
主要成果:
- PR-CPB标本 (PR-1) 实现了2.60 MPa (14d) 和4.02 MPa (28d) 的不受限制的压力强度 (UCS),pH值稳定在11.0左右.
- 在早期水合阶段,UCS显著增加,这表明力量的快速发展.
- 微观结构分析显示,由于交织的水化产品和未反应的颗粒,由于密度更高的结构增加了稳定性.
- 矿物相分析显示,随着P&R复合材料的增加,无形含量略有下降.
结论:
- 拟议的PR-CPB技术为环保利用RM和PG提供了一种有效的方法.
- P&R复合材料提高了填充材料的机械性能和稳定性.
- 可以实现显著的成本节约 (9.45e+5元人民币1000OPC),支持工业应用和可持续实践.
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