偏高岭土碱活化过程中时间分辨水分布及顺磁含量迁移的PD-MRI分析

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-03-18 DOI:10.1016/j.cemconres.2025.107871

Zian Tang , Yuanrui Song , Wenyu Li

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引用次数: 0

摘要

已知碱活化过程是快速的，因此具有挑战性的表征。本文采用质子密度磁共振成像（PD-MRI）技术对偏高岭土碱活化过程中的水分分布进行了观察。利用所获得的固相和放水的可见亮度变化，可以测定碱活化材料（AAMs）的凝固时间，同时可以追踪顺磁性含量（Fe）的迁移和未反应碱的积累。此外，本文还首次基于MRI计算了活化膏体的总收缩率。结果表明，该技术可用于表征具有较低顺磁含量的aam。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Analysis of time-resolved water distribution and paramagnetic contents migration during alkali-activation process of Metakaolin using PD-MRI

The alkali-activation process is known to be rapid and thus challenging to characterize. In this work, we used proton density magnetic resonance imaging (PD-MRI) to observe the water distribution during the alkali-activation process of metakaolin. With the obtained visible brightness changing of the solid phase and the bled water, the setting time of the alkali-activated materials (AAMs) can be determined, while the migration of paramagnetic contents (Fe) and the accumulation of unreacted base can be traced. Moreover, the total shrinkage of the activated paste was calculated for the first time based on MRI in this manuscript. The results show the potential use of this technique for characterizing AAMs with lower paramagnetic content.

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.