硅酸盐通报2024，Vol.43Issue(6)：2005-2011,7.
氟硅渣改性硫酸铝基无碱液体速凝剂对水泥性能的影响
Effect of Aluminum Sulfate Base Alkali-Free Liquid Accelerating Agent Modified by Fluorine Silicon Slag on Cement Properties
摘要
Abstract
In this paper,the aluminum sulfate based alkali-free liquid accelerating agent was modified by fluorine silicon slag,and the performance index of alkali-free liquid accelerating agent modified by fluorine silicon slag was tested.XRD,TG-DTG and SEM were used to explore the action mechanism of aluminum sulfate base alkali-free liquid accelerating agent modified by fluorine silicon slag on cement hydration process.The results show that with the increase of fluorine silicon slag content,the rapid setting effect and strength of mortar increase first and then decrease.When the alkali-free liquid accelerating agent is modified by fluorine silicon slag,the appropriate content of fluorine silicon slag is 5.0％(mass fraction).At this time,the initial setting time is 1 min 20 s,the final setting time is 5 min 20 s,1 d compressive strength is 13.8 MPa,and 28 d compressive strength is 52.4 MPa.Calcium silicate hydrate is formed by the reaction of silica in fluorine silicon slag and cement hydration product calcium hydroxide,which is beneficial to improve the early strength of cement.However,the process of cement hydration and hardening process is hindered by the reaction of fluorine and calcium hydroxide to produce a large amount of calcium fluoride precipitation.关键词
无碱液体速凝剂/喷射混凝土/氟硅渣/凝结时间/抗压强度/微观结构Key words
alkali-free liquid accelerating agent/shotcrete/fluorine silicon slag/setting time/compressive strength/microstructure分类
化学化工引用本文复制引用
刘远,刘孝通,杨安旭,张远永,杨林..氟硅渣改性硫酸铝基无碱液体速凝剂对水泥性能的影响[J].硅酸盐通报,2024,43(6):2005-2011,7.基金项目
贵州省科技计划项目(黔科合平台人才[2019]5409号) （黔科合平台人才[2019]5409号）
校企合作项目(TW2021111501号) （TW2021111501号）
