硅酸盐通报2024，Vol.43Issue(7)：2393-2403,11.
纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究
Internal Curing Properties of Acrylamide Type SAP Loaded with Nano Silica
摘要
Abstract
In this paper,nano silica(NS)loaded acrylamide-type superabsorbent polymer(SAP)was designed and prepared,and the influence of different NS loadings of SAP on the autogenous shrinkage,drying shrinkage,and mechanical properties of mortar were investigated.The results showed that acrylamide-type SAP could completely eliminated the autogenous shrinkage of mortar,and the inhibition effect of NS-loaded SAP on autogenous shrinkage decreased with the increase of NS loading,but still remained above 80％.The introduction of SAP and additional water increased the drying shrinkage of mortar,but with the increase of NS loading,NS-loaded SAP had a positive effect on mitigating the drying shrinkage.The introduction of SAP and additional water reduced the mechanical properties of the mortar,but with the increase of NS loading,the NS-loaded SAP significantly improved the mechanical properties of mortar.In particular,SAP loaded with 50％(relative to the mass fraction of acrylamide)NS had the least effect on the mechanical properties of the mortar,with only a 5.6％and 2.2％loss in compressive and flexural strength of the specimens at 28 d.TG and BSE results showed that the degree of hydration of the cured specimens within NS-loaded SAP increased significantly with the increase of NS loading,and the microstructure was significantly improved.关键词
纳米二氧化硅/高吸水树脂/砂浆/自收缩/干燥收缩/力学性能/水化程度/微观结构Key words
nano silica/superabsorbent polymer/mortar/autogenous shrinkage/drying shrinkage/mechanical property/degree of hydration/microstructure分类
建筑与水利引用本文复制引用
吕阳,范福龙,吴远帅,朱艳超,张呈山,李相国..纳米二氧化硅负载丙烯酰胺型SAP内养护性能研究[J].硅酸盐通报,2024,43(7):2393-2403,11.基金项目
兵团重点科技攻关计划项目(2023AB013-03) （2023AB013-03）
高分子材料湖北省重点实验室2023年度开放基金项目 （）
