混合水泥的长期水合研究:与飞相比,化高酸-伊利特复合粘土与飞相比
Matea Flegar Pregernik1, Marijana Serdar1
1Department of Materials, Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Croatia.
Materials (Basel, Switzerland)
|November 27, 2025
概括
低等级的高酸-伊利特粘土可以用于石灰石化粘土水泥 (LC3). 这些新型粘合剂的水分和机械性能与飞水泥相比较,支持它们作为可持续的低碳粘合剂的使用.
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.
- 可持续建筑 可持续建筑
背景情况:
- 石灰石烧焦粘土水泥 (LC3) 为普通波特兰水泥 (OPC) 提供了一个低碳的替代品.
- 广泛采用LC3需要利用低考利尼特的粘土资源,这些资源比高档考林来源更丰富.
- 了解用复合高利尼特-伊利特粘土制成的LC3的水化和性能对于其商业化至关重要.
研究的目的:
- 评估二进制和三进制LC3型结合剂的长期水分和机械性能,使用低等级的高酸-酸粘土.
- 将这些新型结合剂的性能与传统的OPC和基于飞灰的系统进行比较.
- 评估使用区域来源的低高酸盐粘土作为可持续粘合剂组件的可行性.
主要方法:
- 热重力测量分析 (TGA) 用于量化水化产品,如波特兰和结合水.
- 通过X射线衍射 (XRD) 和瑞特维尔德精细化,识别结晶相,包括碳酸.
- 砂试验以确定机械性能,如压力强度随时间的发展.
- 长期水化研究 (长达1年) 以捕获二次反应动力学.
主要成果:
- 与OPC相比,含有SCM的系统呈现出较低的波特兰和较高的水束,这表明持续的水合.
- 与二元粘土系统相比,LC3结合剂显示出增强的 hemi-和单碳酸的形成.
- 粘土混合物的水合度 (DoH) 在7天后超过了OPC,并在1年内达到可比水平.
- LC3砂的早期强度降低,但在28至90天之间显著增强,与飞水泥相比.
结论:
- 低等级的高化石-伊利特粘土可以有效地用于与石灰岩的LC3结合剂.
- 这些结合剂的长期水分和机械性能与常规飞水泥相美.
- 这些发现支持LC3系统的可行性,使用区域可用的低高素资源作为可持续的低碳结合剂.
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