基于数字图像处理技术的沥青混合料运动特性  

Movement characteristics of asphalt mixture based on digital image disposal technology

作　　者：沙爱民[1] 李亚非[1] 秦雯[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2011年第6期1-5,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50878027)

摘　　要：为了分析沥青混合料在碾压成型过程中分布不均匀的原因,利用数字图像处理软件,分别处理AC-13型沥青混合料振动每30s的试件剖面,进而得到13.20mm、9.50mm、4.75mm、2.36mm这4档集料随时间变化的分布情况。研究结果表明:在AC-13型沥青混合料碾压成型过程中,13.20mm集料的运动趋势随时间变化最为明显,在水平和竖直方向均做上下左右的往复运动,且整体运动幅度较大,对沥青混合料的均匀性影响最大;9.50mm的集料随时间变化的运动趋势较缓和,整体运动方向与13.20mm集料大体一致,对沥青混合料的均匀性有影响;相比以上2档集料,4.75mm档和2.36mm档集料随时间变化的运动趋势都不是很明显,它们的重心基本上都集中在剖面的中心位置,说明这2档集料整体上分布的较为均匀,对沥青混合料的均匀性影响很小。In order to analyze the reason of inhomogeneity happened in the process of asphalt mixtures rolling,this paper using digital image processing software,deals with AC-13 type asphalt mixture every 30 s vibration specimens profile,and then gets the charges with time of four aggregates distribution of 13.20 mm,9.50 mm,4.75 mm,2.36 mm.The research results indicate that in the process of AC-13 asphalt mixtures rolling,13.20 mm aggregate movement trend changes with time quite significantly,this aggregate moves reciprocating and periodically in both horizontal and vertical directions,in the test initial stage the vertical movement is more obvious,the effect on asphalt mixture segregation is the greatest.Compared to the 13.20 mm,the 9.50 mm aggregate＇s,movement trend changing with time intend to mitigate,the whole movement direction is in accord with the one of 13.20 mm,it also has influence on the asphalt mixture of segregation.Compared to the above two grade aggregates,the 4.75 mm and 2.36 mm aggregates＇ movement trend changing with time is not obvious.Basically their centers of gravity are concentrated in the center position of the profile.This shows that the two aggregates on the whole distribution are much uniform and have little impact on asphalt mixture segregation.

关 键 词：道路工程 沥青混合料 运动特性 数字图像处理技术 均匀性 

分 类 号：U414.1[交通运输工程—道路与铁道工程]