钢渣粉对提钛渣胶凝材料中氯离子固化效果的影响机理研究OA

The use of steel slag powder(SSP)as an admixture can promote the strength growth of cementitious materials,but the mechanism of its influence on the Cl-curing effect in cementitious materials is not yet clear.Based on this,finely ground steel slag powder is added to titanium extraction slag(TETS)to prepare CaO-SSP-TETS cementitious material solidified body,and the influence mechanism of steel slag powder on the Cl-solidification effect in the solidified body is explored.Keeping the CaO content and liquid-solid ratio constant,different mass ratios of steel slag powder to titanium extraction slag,the solidification amount of Cl-in the solidified body at different curing ages,and the growth rate of solidification amount were investigated.The Cl-concentration,hydration reaction products,microstructure,and microstructure of the solidified body leachate were characterized using a chloride ion rapid analy-zer,XRD,SEM,and EDS,The results show that the amount of Cl-solidified is proportional to the amount of titani-um slag,and the increase multiple of Cl-solidified increases first and then decreases with the increase of steel slag content.When the mass ratio of steel slag powder to titanium extraction slag is 1∶1,the increase multiple of Cl-solidified is the highest.The newly formed phases in the solidified body are mainly gibbsite,calcite and hydrated calcium silicate.The solidification of Cl-by the solidified body is mainly chemical solidification of Cl-by gibbsite and physical adsorption of Cl-by hydrated calcium silicate.