东南大学学报（自然科学版）2026，Vol.56Issue(8)：1168-1175,8.DOI:10.3969/j.issn.1001-0505.2026.08.008
基于低场核磁共振技术解析碱激发矿渣固化淤泥的水分演化及孔结构
Analysis of water evolution and pore structure of dredged sediment solidified with alkali-activated slag based on low-field nuclear magnetic resonance technology
摘要
Abstract
Excessive free water in dredged sediment(DS)has a negative impact on the strength,durability and volume stability of the solidification system.This paper investigated the effects of water content of DS and ratio of curing agent to DS on hydration and pore structure of DS solidified with alkali-activated slag(AAS)based on low-field nuclear magnetic resonance technology.A novel method for quantitatively characterizing water hydration and transport was proposed,thereby deepening the understanding of the mechanism of water action during the solidification process.The results show that small-sized pores could effectively trap moisture through capillary force.When the water content of DS increases from 50%to 80%,the proportion of capillary pores increases,and the connectivity of the matrix pore network is enhanced.It results in an enhanced water transport effect,and part of water in capillary pores migrates directionally to the large pores about 160 nm due to humidity differences,and participates in secondary hydration reactions with unreacted slag.Increasing the ratio of curing agent to DS allows more water to participate in the hydration reaction.This not only refines the pore structure,but also weakens the water transport effect.The increase of hydration products improves the mechanical properties,and mitigates the adverse impact of high water content on the comprehensive perfor-mance of the system.关键词
碱激发矿渣/淤泥固化/水分演化/孔结构/低场核磁共振Key words
alkali-activated slag/dredged sediment solidification/water evolution/pore structure/low-field nuclear magnetic resonance分类
建筑与水利引用本文复制引用
陈振中,徐文沁,陈春,王伟,张亚梅..基于低场核磁共振技术解析碱激发矿渣固化淤泥的水分演化及孔结构[J].东南大学学报（自然科学版）,2026,56(8):1168-1175,8.基金项目
国家自然科学基金面上资助项目(51972057) （51972057）
中国施工企业管理协会科技研发资助项目(2024-C-134) （2024-C-134）
常州地铁5号线建设弃置土资源化高效利用与应用技术研究资助项目(8512008673). （8512008673）
