Preparation and performance study of composite cementitious materials with pressure heat sinking steel slag and cement clinker
This article focuses on the study of pressure heat stewed steel slag and cement clinker,and explores the influence of the spe-cific surface area and dosage of steel slag micro powder on the properties of pressure heat stewed steel slag cement clinker composite cementitious materials.The hydration products and micromorphology were analyzed by XRD and SEM.Research has shown that the 28 d activity index of the composite cementitious material made of pressure heated steel slag and cement clinker gradually increases with the increase of specific surface area.However,with the increase of steel slag content,the flowability and activity index of the compos-ite cementitious material gradually decrease.The hydration products of composite cementitious materials are mainly Ca(OH)2,C-S-H gel,AFt crystal and C2S without hydration,and the microscopic morphology is mainly flocculent and fibrous C-S-H gel.
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