硅酸盐通报2026，Vol.45Issue(7)：2324-2334,11.DOI:10.16552/j.cnki.issn1001-1625.2026.0034
水泥基材料中高吸水树脂吸水行为的敏感性研究
Sensitivity of Absorption Behavior of Superabsorbent Polymers in Cementitious Materials
摘要
Abstract
This study systematically compared the water absorption behavior in cementitious materials environments of two superabsorbent polymers(SAP):sodium polyacrylate superabsorbent polymer(AA-SAP)and polyacrylamide superabsorbent polymer(AM-SAP).The effects of cementitious material type,polycarboxylate ether(PCE)dosage,stirring rate,ambient temperature,and external pressure were investigated.Results show that AA-SAP,due to electrostatic repulsion from its ionic structure,absorbs water significantly faster than AM-SAP,which relies on hydrogen bonding.In pore solutions of different cementitious materials,geopolymer systems most strongly suppress SAP swelling because of their high ionic strength.The water absorption capacity of AA-SAP has an optimal response range to PCE dosage,while the water absorption capacity of AM-SAP continuously decreases with increasing PCE content.Higher stirring rates,leveraging the Bernoulli effect,promote swelling,with a more pronounced response in AA-SAP.Elevated temperature enhances the swelling of the two types of SAPs and thus improves water absorption capacity,while external pressure suppresses the network expansion of the two types of SAPs,leading to a reduction in water absorption ratio.The absorption behavior of SAP is governed by both molecular structure and external environment:AA-SAP performs better under low ionic strength,low-to-medium shear,or warmer conditions,while AM-SAP shows greater stability in high ionic strength or high-pressure settings.The findings provide both theoretical insights and practical guidance for the application of different types of SAPs in concrete.关键词
高吸水树脂/水泥基材料/离子型树脂/非离子型树脂/吸水行为/敏感性Key words
superabsorbent polymer/cementitious material/ionic polymer/non-ionic polymer/absorption behavior/sensitivity分类
建筑与水利引用本文复制引用
杨进,刘潇,贺行洋,苏英,王金付..水泥基材料中高吸水树脂吸水行为的敏感性研究[J].硅酸盐通报,2026,45(7):2324-2334,11.基金项目
国家重点研发计划(2025YFE0213000) （2025YFE0213000）
国家自然科学基金(52172017,51902095) （52172017,51902095）
