表面改性处理对钢渣及其混合料性能影响研究  

Effect of Surface Modification on Properties of Steel Slag and Its Mixture

作　　者：曹建宁 高颖[2] 白良义 CAO Jianning;GAO Ying;BAI Liangyi(China Construction Road and Bridge Group Co.,Ltd.,Shijiazhuang 050001;Hebei University of Engineering,Handan 056107,Hebei)

机构地区：[1]中建路桥集团有限公司,石家庄050001 [2]河北工程大学土木工程学院,河北邯郸056107

出　　处：《公路交通技术》2022年第2期1-6,共6页Technology of Highway and Transport

基　　金：国家自然科学基金项目(51508150);国家重点研发计划项目(2018YFF0300200);河北省自然科学基金项目(E2018402206);河北省教育厅青年拔尖人才计划资助项目(BJ2017034)。

摘　　要：为研究表面改性处理对钢渣材料及其混合料性能的增强效果,将硅丙乳液作为表面改性剂,探究不同改性剂浓度、改性时间对钢渣性能的影响规律,利用无侧限抗压强度试验、抗压回弹模量试验以及劈裂强度试验评价水泥稳定碎石钢渣混合料的路用性能。研究表明,表面改性对钢渣的疏水性能及其体积稳定性具有积极影响,4.75 mm~9.5 mm、9.5 mm~13.2 mm粒径钢渣吸水率、浸水膨胀率分别降低了23.1%、14%;当改性剂浓度为12%、浸泡时间为24 h时,水泥稳定碎石改性钢渣混合料具有良好的力学性能,抗压强度明显高于未改性钢渣混合料。结论是建议采用浓度为12%、浸泡处理时间为24 h的硅丙乳液,作为钢渣改性剂。In order to study the effect of surface modification on the performance of steel slag material and its mixture,the silicone acrylic emulsion as surface modifier was used to explore the effect of different modifier concentration and modification time on the performance of steel slag,and the unconfined compressive strength test was carried out.The road performance of cement stabilized macadam and steel slag mixture is evaluated by compressive rebound modulus test,compression rebound modulus test and splitting strength test.The results show that the surface modification has a positive effect on the hydrophobicity and volume stability of steel slag.The water absorption and water immersion expansion of steel slag with particle sizes of 4.75 mm~9.5 mm and 9.5 mm~13.2 mm are reduced by 23.1%and 14%respectively;When the modifier concentration is 12%and the soaking time is 24 h,the cement stabilized crushed stone steel slag mixture has good mechanical properties,and the compressive strength is significantly higher than that of unmodified steel slag mixture.The conclusion that it is suggested that 12%concentration of silicone acrylic emulsion is used as steel slag modifier and the soaking time is 24 h.

关 键 词：钢渣 表面改性 混合料 路用性能 改性剂 

分 类 号：U414[交通运输工程—道路与铁道工程]