硫酸盐载体添加对土混合水泥微结构的影响
Maximilian Panzer1, Sebastian Scherb1, Nancy Beuntner1
1Institute for Construction Materials, University of the Bundeswehr Munich, Werner-Heisenberg-Weg 39, 85579 Neubiberg, Germany.
Materials (Basel, Switzerland)
|November 13, 2025
概括
硫酸盐载体添加 (sca) 显著提高了泥混合水泥的早期强度,特别是在以1:1为主导的粘土中. 微观结构分析显示,水分得到改善,孔隙性减少,尽管强度预测仍然复杂.
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.
- 地质化学 地质化学
背景情况:
- 之前的研究强调了硫酸盐载体添加 (sca) 对烧焦粘土混合水泥早期压力强度的积极影响.
- 在使用1:1占主导地位的粘土的水泥中,SCA的有效性尤其被注意到.
研究的目的:
- 为了研究背后的微观结构机制观察到的早期压力强度的改善归因于sca.
- 为了比较在烧焦粘土中的微观结构效应,混合了具有不同粘土成分的水泥 (1:1对2:1占主导地位).
主要方法:
- 波特兰水泥被不同替代水平的化高酸,酸和非酸粘土所替代.
- 硫酸盐载体添加 (sca) 在不同的粘土混合物中有所不同.
- 微结构分析包括水合物相识别,孔隙性评估和硬化水泥糊的扫描电子显微镜 (SEM) 在2天和28天.
主要成果:
- 在 2:1 主导的粘土混合物中,Sca 改善了微结构性质,但比 1:1 主导的混合物要少.
- 在2:1混合物中,波特兰含量下降不那么显著,甚至可能略有增加.
- 对所有混合物来说,增加度导致结合水的增加和在早期水化过程中孔径的减少.
- 既没有结合的水,也没有透性本身为可靠的压力强度预测提供了足够高的相关性.
结论:
- 在烧焦粘土混合水泥中,Sca提供了微观结构的好处,在1:1主导的粘土混合物中效果更为明显.
- 微观结构的变化虽然显著,但不能完全解释或预测早期的压力强度仅仅基于结合的水或多孔性.
- 需要进一步的研究,以充分阐明这些水泥系统中,微观结构和强度发展之间的复杂关系.
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