过粉尘作为补充水泥材料的挑战和性能
Johannes Berger1, Anabella Mocciaro2, Gisela Cordoba3
1Institut für Werkstoffe des Bauwesens, Universität der Bundeswehr München, 85579 Neubiberg, Germany.
Materials (Basel, Switzerland)
|November 27, 2024
概括
来自烧焦粘土生产的过器灰尘可以成为一种有价值的补充固体材料 (SCM). 一个尘埃样本显示了高的pozzolanic反应性,与飞灰相比,提供了可持续的废物回收利用途径.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 全球经济主要遵循线性模式,需要向循环经济转变.
- 恢复人为沉积物,如工业废物,对于可持续的资源管理至关重要.
- 来自烧焦粘土生产的过器尘埃代表着一个重要的,未得到充分利用的废物流.
研究的目的:
- 调查德国和阿根廷土生产中的过粉尘作为补充水泥材料 (SCM) 的潜力.
- 为了比较未经处理和烧焦的过粉尘与工业基础产品的性能和pozzolanic反应性.
- 评估利用这些废物材料在水泥应用中的可行性,为循环经济做出贡献.
主要方法:
- 来自土生产的两个过器尘埃样本 (德国和阿根廷) 的表征.
- 对未经处理和烧焦的过粉尘进行比较分析,包括物理性质和pozzolanic反应性.
- 评估烧温度对特定表面积,水需求,颗粒大小分布和反应性的影响.
主要成果:
- 一个过尘埃样本证明了其适合作为完全补充的固材料 (SCM),而无需额外处理.
- 发现合适材料的波佐兰反应性与飞灰的反应性相当.
- 材料被分为反应性波佐兰和具有较小波佐兰活性的填充材料.
- 在两组材料中都观察到烧温度与特定表面积/水需求之间的反向关系.
结论:
- 来自烧焦粘土生产的过粉尘可以有效地作为补充性水泥材料 (SCM) 进行价值化.
- 特定的尘埃样本表现出显著的pozzolanic反应性,为传统的SCMs提供了一个可持续的替代方案.
- 化温度对这些废物材料的物理性质和反应性产生重大影响,从而使性能优化成为可能.
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