一种创新的高含量钢渣-硫酸盐复合活性粘合剂:水化行为和应用
Zehai Li1, Jun Yao1, Shaoguang Hua2,3,4
1College of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
本研究介绍了一种硫酸盐方法,用于将50%以上的钢渣用于粘合剂,达到12.85MPa的强度,并固定废料中的重金属.
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.
- 环境科学 环境科学
背景情况:
- 钢的低活性和扩张风险阻碍了其在水泥材料中的使用.
- 从钢等工业副产品中开发可持续的粘合剂至关重要.
研究的目的:
- 开发一种新的-硫酸盐协同激活方法,用于高含量钢渣粘合剂.
- 调查混合物比例和激活剂特性对粘合剂性能的影响.
- 评估粘合剂在-尾矿中固化和固定重金属的有效性.
主要方法:
- 系统地调查活性剂剂量,模量,钢渣和烟气脱硫石膏含量.
- 机械性能测试 (压力强度) 和可加工性评估.
- 使用识别水化产品的技术进行微观结构性表征 (C-A-S-H,).
- 尾部固化试验评估强度和重金属固定性 (Pb,As,Cd,Zn).
主要成果:
- 一种由60%的钢渣,30%的飞灰,10%的石膏组成的粘合剂,由20%的活性剂 (模块1.0) 激活,实现了12.85MPa的28天压力强度.
- 观察到非常好的体积稳定性.
- 粘合剂有效地固化了-尾矿,使重金属不移,效率>80%,符合环境水标准.
- 由C-A-S-H和矿形成的密集微观结构有助于强度和固定.
结论:
- 硫酸盐协同激活方法使钢渣在粘合剂中的大量利用成为可能.
- 开发的粘合剂为尾矿管理和重金属固定提供了可持续的解决方案.
- 了解水化机制为优化基于钢的材料提供了一个框架.
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