沥青路面碾压温度场与有效压实时间分析  

Analysis of Rolling Temperature Field and Effective Compaction Time of Asphalt Pavement

作　　者：石鑫[1] 李彦伟[2] 张久鹏[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]石家庄市交通运输局,河北石家庄050051

出　　处：《公路交通科技》2013年第6期17-22,32,共7页Journal of Highway and Transportation Research and Development

摘　　要：为研究碾压温度对沥青混合料压实特性的影响,采用数值方法建立了松铺和密实2种状态下沥青混合料碾压温度场的分析模型。研究了不同环境因素、摊铺层厚度以及初始温度下沥青混合料碾压温度随时间的变化规律。计算了沥青混合料的最短有效压实时间和最长有效压实时间,建立了有效压实时间的多元回归模型,并通过实体工程进行了验证。结果表明:温度随着时间的增加而不断降低,降温速率随着风速的降低,大气温度、太阳辐射热量或摊铺层厚度的增加而降低,而松铺沥青混合料的降温速度快于密实沥青混合料,其有效压实时间更短。经验证,有效压实时间计算模型合理可靠,可为今后工程实践提供参考依据。In order to study the influence of rolling temperature on the compaction characteristic of asphalt mixture, the numerical method is employed to build the analysis models of roiling temperature field of asphalt mixture in both loose and dense states, and the regularities of rolling temperature varying with time in different environmental factors, paving layer thicknesses, and initial temperatures are analyzed. Both the shortest and the longest effective compaction time for asphalt mixture are calculated, and a multivariate regression model of effective compaction time is established and verified by real engineering. The result indicates that （ 1 ） the temperature is falls with the increase of time, and the temperature falling rate decreases with the decrease of wind speed and the increase atmospheric temperature, solar radiation heat or paving layer thickness; （2） the cooling rate of loose paving asphalt mixture is faster than that of the dense one, and the loose one has a shorter effective compaction time. The proposed model of effective compaction time is reasonably reliable, and could be taken as a reference for the enineerinz oractices in future.

关 键 词：道路工程 沥青路面 碾压温度场 有效压实时间 数值分析 

分 类 号：U416.2[交通运输工程—道路与铁道工程]