硅酸盐通报2025，Vol.44Issue(5)：1779-1787,9.DOI:10.16552/j.cnki.issn1001-1625.2024.1321
固体激发剂对单组份碱激发矿渣-飞灰复合胶凝材料的影响
Effect of Solid Activator on One-Part Alkali-Activated Slag-Fly Ash Composite Cementitious Material
摘要
Abstract
The conventional alkaline solution activator has high corrosion and viscosity,which limits the large-scale application of alkali-activated technology in fly ash disposal.It is very important to select appropriate solid activator for the preparation of cementitious materials.One-part alkali-activated slag-fly ash composite cementitious material was prepared in this paper.The effects of different solid activators on the mechanical properties and hydration products of cementitious material were discussed in order to find a more effective fly ash treatment solution.The results show that sodium silicate pentahydrate can improve the early strength of cementitious material,and the additional silicon source promotes the formation of silicon-oxygen tetrahedron,which is conducive to the formation of network hydrated calcium aluminosilicate gel.Calcium oxide has a significant effect on the growth of later strength.The maximum compressive strength of cementitious material at 28 d is 28.90 MPa.The higher alkalinity can make the silicon-aluminum phase continue to dissolve and produce more effective polymerization.The heavy metal leaching concentrations in the cementitious material activated by sodium sulfate,sodium silicate pentahydrate and calcium oxide all meet the standard allowable values.The dense gel structure is conducive to the fixation of heavy metals,reducing cracks and pores,and further reducing the leaching amount of heavy metals.关键词
垃圾焚烧飞灰/单组份碱激发胶凝材料/固体激发剂/氧化钙/抗压强度/重金属浸出浓度Key words
municipal solid waste incineration fly ash/one-part alkali-activated cementitious material/solid activator/calcium oxide/compressive strength/heavy metal leaching concentration分类
化学化工引用本文复制引用
叶伟开,盛国栋,鲁刘磊,张锦红,张宗洋,董发鑫,刘明旺,汪峻峰,罗琦..固体激发剂对单组份碱激发矿渣-飞灰复合胶凝材料的影响[J].硅酸盐通报,2025,44(5):1779-1787,9.基金项目
海南省重点研发项目(ZDYF2022SHFZ322) （ZDYF2022SHFZ322）
深圳市低碳建筑材料与技术重点实验(ZDSYS20220606100406016) （ZDSYS20220606100406016）
