助磨剂及RO相分选对钢渣胶凝活性的影响-中国材料进展

文章信息/Info

Title:: Effect of Grinding Aids and RO Phase Separation on Cementitious Activity of Steel Slag

作者:: 嵇鹰; 白龙; 朱刚; 刘玺; 樊帅; 1. 西安建筑科技大学材料科学与工程学院，陕西西安 710055 2. 中国建筑材料工业建设西安工程有限公司，陕西西安 710065

Author(s):: JI Ying; BAI Long; ZHU Gang; LIU Xi; FAN Shuai; 1. College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China 2. China Building Materials Industrial Construction Xi’an Engineering Co., Ltd., Xi’an 710065, China

摘要:: 针对钢渣易磨性差、活性低的问题，采用加入助磨剂和RO相分选的方法以降低能耗和提高其活性。通过加入6种助磨剂后对钢渣进行粉磨，探究助磨剂对钢渣粉比表面积、粒度分布、RO相解离度的影响；并对粉磨后的钢渣粉进行RO相分选，研究分选对钢渣RO相含量、活性和水化微观性能的影响。结果表明：助磨剂和RO相分选对钢渣的胶凝活性提高作用明显。助磨剂的加入改善了钢渣粉的粒度分布均匀性，增加了粒径为3~32 μm的颗粒含量，提高了钢渣粉的比表面积和RO相解离度，分选降低了钢渣粉中RO相的含量。助磨剂TD（三异丙醇胺和二乙二醇按质量比1∶1复配）的助磨效果最好且对RO相的解离效果达到最大，分选后钢渣粉中RO相含量降低了38.58%，钢渣粉掺量为30%时7和28 d活性指数相较于空白组分别提高了27.32%和21.48%。

Abstract:: Aiming at the problems of poor grindability and low activity of steel slag, the method of adding grinding aids and RO phase separation was adopted to reduce energy consumption and improve its activity. The steel slag was ground by adding six kinds of grinding aids, and the effects of grinding aids on the specific surface area, particle size distribution and RO phase liberation degree of steel slag powder were investigated. After grinding, the steel slag powder was separated by RO phase, and the effects of separation on RO phase content, activity and hydration microscopic properties of steel slag were discussed. The results showed that grinding aids and RO phase separation can significantly improve the cementitious activity of steel slag. The addition of grinding aid improved the uniformity of particle size distribution of steel slag powder, increased the particle content of 3~32 μm, increased the specific surface area and RO phase liberation degree of steel slag powder, and reduced the RO phase content of steel slag powder by separation. The grinding aid TD (mixed with triisopropanolamine and diethyleneglycol 1∶1) has the best grinding aid effect and the largest liberation effect on the RO phase. After separation, the content of RO phase in steel slag powder is reduced by 38.58%. When the steel slag powder content is 30%, the activity index of 7 and 28 d is increased by 27.32% and 21.48% respectively compared with the blank group.