固体内容分布对含铁激活材料的低场核磁共振特征的影响
Zian Tang1,2, Yuanrui Song1,2, Wenyu Li3
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
对于活性化材料 (AAMs) 的低场NMR (LF-NMR) 解释需要调整,因为有偏磁成分和水的运动. 在AAM泥中的分层显著影响LF-NMR表征可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 地质化学 地质化学
- 分析化学 分析化学
背景情况:
- 目前对活性材料 (AAM) 的低场NMR (LF-NMR) 解释通常依赖于为波特兰水泥开发的模型.
- 这些模型可能无法完全解释亚磁/铁磁成分和AAM中自由水再分配的独特影响.
研究的目的:
- 调查对磁性/铁磁性成分和自由水分布对LF-NMR和质子密度磁共振成像 (PD-MRI) AAMs特征的影响.
- 评估LF-NMR数据解释在分层AAM泥中的可靠性.
主要方法:
- 活性材料 (AAMs) 是使用高炉渣,飞灰和具有NaOH激活的钢渣制备的.
- 使用了0.45和0.5的液体/固体比率,分析了顶部,中间和底部的泥层.
- 使用LF-NMR和PD-MRI技术来描述AAM泥的特征.
主要成果:
- 含水量较低的泥和富含CaO的材料显示出均的松和微不足道的沉积.
- 较高的含水量和缺乏CaO的材料导致了明显的分层和信号强度的梯度.
- 在稀释,分层系统中对LF-NMR数据的解释可能是不可靠的,因为在层之间转移时质子放松时间延长.
结论:
- 偏磁性/铁磁性成分和自由水的分布显著影响LF-NMR和PD-MRI对AAMs的表征.
- 在AAM泥中的分层可能导致不可靠的LF-NMR数据解释.
- 提出了一种初步方法来评估泥适用于LF-NMR表征的适用性.
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