化工进展2025，Vol.44Issue(3)：1739-1748,10.DOI:10.16085/j.issn.1000-6613.2024-0327
化学外加剂对固废基胶凝材料性能及水化行为的影响
Effects of chemical admixtures on properties and hydration behaviors of solid waste based cementitious materials
摘要
Abstract
In this study,solid waste based composite cementitious materials were prepared using coal gasification slag,circulating fluidized bed fly ash and cement.Sodium hydroxide(NaOH),sodium sulfate(Na2SO4)and sodium carbonate(Na2CO3)were selected as chemical admixtures.The effects of single admixture and the NaOH-Na2SO4 mixed admixture on the compressive strength,fluidity,setting time and shrinkage of composite cementitious materials were investigated.The hydration mechanism was analyzed using isothermal calorimetry,X-ray diffraction(XRD),simultaneous thermal analysis(TG-DTG)and scanning electron microscopy(SEM).Results showed that the incorporation of all three chemical admixtures could shorten the setting time of the composite cementitious system and reduce the fluidity of the system.The moderate addition of NaOH and the Na2CO3 could significantly improve the early strength of the composite cementitious system,the addition of Na2SO4 could significantly improve the 28d and 90d strength of the system,and the addition of NaOH-Na2SO4 composite admixture could improve the strength of different ages.关键词
煤气化渣/循环流化床粉煤灰/复合胶凝材料/化学外加剂/综合性能/水化机理Key words
coal gasification slag/circulating fluidized bed fly ash/composite cementitious materials/chemical activator/comprehensive performance/hydration mechanism分类
土木建筑引用本文复制引用
孙雅娟,段思宇,张宏,周冬冬,路广军,马志斌..化学外加剂对固废基胶凝材料性能及水化行为的影响[J].化工进展,2025,44(3):1739-1748,10.基金项目
国家自然科学基金(22078181) （22078181）
中央引导地方科技发展资金(YDZJSX20231A007) （YDZJSX20231A007）
山西省重点研发计划(202202090301021) （202202090301021）
山西省基础研究计划(202103021223268). （202103021223268）
