钢渣水泥稳定级配碎石混合料性能评价与应用  

Performance Evaluation and Application of Steel Slag Cement Stabilized Graded Crushed Stone Mixture

作　　者：张玉香[1] ZHANG Yuxiang(China Railway 18^(th)Bureau Group Tunnel Engineering Co.,Ltd.,Chongqing 400700,China)

机构地区：[1]中铁十八局集团隧道工程有限公司,重庆400700

出　　处：《路基工程》2024年第3期82-88,共7页Subgrade Engineering

摘　　要：为将钢渣水泥稳定级配碎石应用于半刚性基层,分析20%~80%钢渣掺量对水泥稳定碎石力学性能(无侧限抗压强度、弯拉强度、动态回弹模量)、变形特性(干缩变形、温缩变形)、疲劳性能的影响规律,并基于室内研究成果铺筑试验段。结果表明:采用钢渣替代粗集料可增强水泥稳定级配碎石混合料的无侧限抗压强度、弯拉强度、动态回弹模量与抗疲劳耐久性能;增大钢渣掺量导致水泥稳定级配碎石温缩、干缩变形增大,以控制最大干缩系数不超过70~85με,以温度在-25~60℃区间内的平均温缩系数不大于12~15με/℃为限制条件,建议最大钢渣掺量为40%~60%;钢渣掺量40%的水泥稳定碎石基层试验段各指标,均满足相关设计、施工规范要求。In order to apply steel slag cement stabilized graded crushed stone to semi-rigid base,the effects of 20%−80%steel slag content on mechanical properties(unconfined compressive strength,flexural tensile strength,dynamic resilience modulus),deformation characteristics(dry shrinkage deformation,temperature shrinkage deformation)and fatigue properties of cement stabilized crushed stone were analyzed.The results show that the unconfined compressive strength,flexural tensile strength,dynamic resilience modulus and fatigue durability of cement stabilized graded crushed stone mixture can be enhanced by using steel slag instead of coarse aggregate.With the increase of steel slag content,the temperature shrinkage and dry shrinkage deformation of cement stabilized graded crushed stone will increase,so as to control the maximum dry shrinkage coefficient not exceeding 70−85με,and the average temperature shrinkage coefficient in the temperature range of−25 to 60℃is not more than 12 to 15με/℃as the limiting condition,the maximum steel slag content is recommended to be 40%−60%.The indexes of base test section of the cement stabilized crushed stone with 40%steel slag content meet the requirements of relevant design and construction specifications.

关 键 词：道路工程 钢渣水泥稳定碎石 钢渣掺量 粗集料 养生 工艺试验 变形特性 经济性 

分 类 号：U414.25[交通运输工程—道路与铁道工程]