土木与环境工程学报（中英文）2024，Vol.46Issue(5)：160-167,8.DOI:10.11835/j.issn.2096-6717.2022.072
机械粉磨对岩土固化用无熟料胶凝材料性能的影响
Effect of mechanical grinding on properties of the cementitious materials without clinker for soil solidification
摘要
Abstract
A hydraulic cementitious material was prepared by using rice husk ash,CFB desulfurization ash and steel slag,which can replace cement for soil solidification.In order to improve the activity and other properties of this cementitious material,the performance change and mechanism of the clinkerless cementitious material after mechanical grinding were studied.The results show that with the increase of grinding time,the particle size distribution curve of the cementitious materials changes from multi-peak distribution to single-peak distribution,the water consumption of standard consistency decreases and the setting time shortens.The end time of the hydration induction period and the appearance time of the second exothermic peak were significantly advanced,and the cumulative heat release increased.The early compressive strength and autogenous shrinkage of mortar specimens increased significantly.The initial flow expansion degree of the fluidized solidified soil prepared by the cementitious materials increases with the increase of grinding time,and the time-dependent loss accelerates.Mechanical grinding had no significant effect on the early strength of the solidified soil,while the later strength increases first and then decreases.Using this cementitious material without clinker to prepare fluidized solidified soil can meet the strength requirements of general backfill projects.关键词
无熟料胶凝材料/机械粉磨/粒度分布/水化热/抗压强度/固化土Key words
cementitious material without clinker/mechanical grinding/particle size distribution/hydration heat/compressive strength/solidified soil分类
资源环境引用本文复制引用
周永祥,刘倩,王祖琦,郝彤,冷发光..机械粉磨对岩土固化用无熟料胶凝材料性能的影响[J].土木与环境工程学报（中英文）,2024,46(5):160-167,8.基金项目
国家重点研发计划(2018YFD1101002) National Key R&D Program of China(No.2018YFD1101002) （2018YFD1101002）
