摘要
将陶瓷粉末等体积替代SMA-13的细集料(替代率分别为10%,20%,30%,40%,50%)制备陶瓷粉末沥青混凝土,研究陶瓷沥青混凝土的热物性参数;建立基于热传导理论的沥青路面温度场模型,模拟不同陶瓷粉末掺量的沥青混凝土在运营阶段的路面温度变化,以及摊铺施工阶段路面温度散失情况。建立车辙分析模型,模拟陶瓷沥青混凝土在温度和荷载耦合作用下的永久变形。结果表明,陶瓷粉末沥青混凝土的导热系数降低;与SMA-13沥青混合料相比,掺量为50%的陶瓷沥青混合料1在运营阶段路表4cm深度处的最高温度降低了4.42℃;2在施工阶段根据温度热散失得到的有效压实时间增加24min;3其永久变形为1.12cm,比无隔热层路面减少56%。
Ceramic asphalt concrete is produced by replacing fine aggregate of SMA-13 with different amount of ceramic powder.The percentages of replacement by volumes are 10%,20%,30%,40% or 50%.The thermophysical parameters of ceramic asphalt concrete are studied.A model of pavement temperature field is developed based on the heat conduct theory to simulate the temperature variation during the operations and the heat loss during the constructions for the ceramic asphalt concrete with different amounts of ceramic replacement.A rutting model of pavement is also developed in this study to simulate the permanent deformation under the coupling effects of temperatures and loadings.The results show that the heat conductivity coefficient for the concrete with ceramic decreases.When the ceramic replacement reaches 50%,the highest temperature at 4cm below the ceramic asphalt concrete surface during the operations decreases by 4.42 ℃;the effective compacting time increases 24 min during the constructions;and the permanent deformation is 1.12 cm,which decreases by 56% comparing to SMA-13 asphalt concrete.
出处
《交通信息与安全》
2015年第5期112-116,共5页
Journal of Transport Information and Safety
关键词
交通工程
陶瓷沥青混凝土
车辙
导热系数
温度场
有效压实时间
有限元分析
traffic engineering
ceramic asphalt concrete
rutting
heat conductivity coefficient
temperature field
effective compacting time
finite element analysis
