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Updated: May 10, 2025

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Calcium Carbonate Formation in the Presence of Biopolymeric Additives
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2的加固效应对固体废弃物为基础的精细尾带水泥材料的化性能
1School of Chemical Engineering and Environment, Weifang University of Science and Technology, Weifang 262700, China.
Molecules (Basel, Switzerland)
|April 26, 2025
概括
将化 (CaCl2) 添加到基于固体废物的水泥材料 (SWCMs) 中,可以显著加快水泥尾矿回填的硬化. 这项创新可将固化时间缩短50%,提高采矿效率和安全性.
科学领域:
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
- 环境科学 环境科学
背景情况:
- 普通的波特兰水泥 (OPC) 面临着环境问题和在凝固细尾矿时的限制.
- 基于固体废物的固体材料 (SWCMs) 为矿山尾矿利用提供了一个可持续的替代方案.
- 加速器对于提高水泥填埋场的早期强度和性能至关重要.
研究的目的:
- 调查化 (CaCl2) 作为SWCM加速器在凝固细尾矿中的作用.
- 为了提高固性能,减少尾矿回填的硬化时间.
- 评估在实际采矿应用中使用CaCl2-修改SWCM的可行性.
主要方法:
- 合成的SWCM用于凝固细细的尾矿.
- 包含不同量的CaCl2作为加速器.
- 评估了水化动力学,水化产品的形成 (C-S-H凝,乙) 和机械强度的发展.
- 与没有CaCl2.2的对照样本进行性能比较.
主要成果:
- 添加CaCl2加速了原材料的水合,并增加了水合产品的形成.
- 由于C-S-H凝和埃特林吉特的协同作用,观察到水泥性能显著提高.
- 硬化时间减少约50% (至~36小时).
- 确定最佳的CaCl2含量为1.5重量%,在36小时内达到0.21MPa强度,粘合剂与尾带的比率为1:8.
结论:
- CaCl2有效地提高了SWCM用于精细尾矿的凝固性能.
- 使用CaCl2修饰的SWCM快速硬化回填,对采矿业务产生了积极的影响.
- 这种方法为矿山尾矿管理提供了更可持续,更具成本效益和更高效的解决方案.
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