水泥对微表处混合料性能影响规律及作用机理  

Influence Law of Cement on the Performance of Microsurfacing Mixture and Its Mechanism

作　　者：蒋玮[1] 肖晶晶[2] 王振军[3] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]长安大学建筑工程学院,西安710061 [3]长安大学材料科学与工程学院,西安710061

出　　处：《武汉理工大学学报（交通科学与工程版）》2012年第1期1-5,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家"十一五"科技支撑计划项目资助(批准号:2006BAJ18B05)

摘　　要：在可拌和时间试验基础上,设计了破乳率试验和温度变化试验,结果表明水泥自身吸水、水化反应"需水"以及水化反应物的生成,促进了改性乳化沥青的破乳,提高了混合料的早期强度.水泥水化产物能够切断混合料内部相连微孔,填充乳液中水分蒸发形成的空隙,并与沥青膜相互交织形成空间网络结构,全面提高了混合料的路用性能.水泥20min、水泥40min是原样水泥分别球磨20,40min后的产物,因具有更大的比表面积,其促破、增强以及对路用性能的改善效果比水泥原样更显著.Based on the conventional mixable time test,the author designed demulsification ratio test and temperature variation test,research results showed that cement water absorption,hydration reaction needing water and hydration reactants generation promoted the emulsion breaking and reinforced the mixture′s early strength effectively.Hydration reactants cut off mixture′s internal micro porous,filled voids formed by emulsion water evaporation,and composed a spatial network structure with asphalt membranes through mutual interleaving function,then improved the mixture＇s performance whole fully.Cement 20min and cement 40min have an more obviously effects on breaking promotion and strength enhancement,because the have larger specific surface area after milling technology.

关 键 词：道路工程 微表处 水泥 可拌和时间 破乳率 粘聚力 路用性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]