硅酸盐通报2025，Vol.44Issue(1)：21-30,10.DOI:10.16552/j.cnki.issn1001-1625.2024.0788
纳米C-S-H晶核早强剂对水泥早期水化的影响
Effect of Nano-C-S-H Seeds Early-Strength Agent on Early Hydration of Cement
摘要
Abstract
Investigating the impact mechanisms of nano-C-S-H seeds early-strength agent on the early hydration of cement is pivotal for advancing their application in practical engineering.By comparing mechanical properties and hydration heat tests,the effect of varying content of synthesized nano-C-S-H and the differences in effects compared to commonly early-strength agents were analyzed.Additionally,XRD,TG-DTG and SEM were employed to elucidate the effect of nano-C-S-H on the cement hydration process.The results demonstrate that increasing the content of the synthesized nano-C-S-H seeds early-strength agent leads to an initial rise in 1 d compressive strength,hydration heat release rate,and total hydration heat,followed by a decline.The optimal early-strength effect is observed at content of 0.6％by mass of the cementitious materials.When the content of nano-C-S-H is 0.6％,the nano-C-S-H seeds early-strength agent has the best early-strength effect and has no negative effect on the compressive strength at 7 and 28 d.Compared to the blank group,the addition of nano-C-S-H significantly enhances the hydration rate during the cement induction period,as well as the formation and density of AFm,AFt and C-S-H gels during the 1 d age,but has no significant effect on the formation of hydration products at the middle and late ages.关键词
纳米C-S-H晶核早强剂/成核位点/抗压强度/水化热/水化产物/微观形貌Key words
nano-C-S-H seeds early-strength agent/nucleation site/compressive strength/hydration heat/hydration product/microstructure morphology分类
建筑与水利引用本文复制引用
张金龙,唐孟雄,衷从浩,胡家兵,邵强,钟开红..纳米C-S-H晶核早强剂对水泥早期水化的影响[J].硅酸盐通报,2025,44(1):21-30,10.基金项目
国家自然科学基金(52341801,52378332) （52341801,52378332）
广东省住房和城乡建设厅科技创新计划项目(2021-K25-284959,2022-K25-212467) （2021-K25-284959,2022-K25-212467）
广州市建筑集团有限公司科技计划项目([2021]-KJ015,[2023]-KJ020) （[2021]-KJ015,[2023]-KJ020）
广州市建筑科学研究院集团有限公司科技计划项目(2022Y-KJ03,2023Y-KJ03) （2022Y-KJ03,2023Y-KJ03）
