基于图像处理技术的厂拌热再生混合料均匀性研究  

Homogeneity of Plant-Produced RAP Mixtures Based on DIP Technology

作　　者：唐伟 李宁 邹晓勇 詹贺 于新[1] TANG Wei;LI Ning;ZOU Xiaoyong;ZHAN He;YU Xin(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,Jiangsu,China;Jinhua Highway and Transportation Administration Center,Jinhua 321103,Zhejiang,China)

机构地区：[1]河海大学土木与交通学院,江苏南京210098 [2]金华市公路与运输管理中心,浙江金华321103

出　　处：《重庆交通大学学报（自然科学版）》2023年第1期60-65,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：江苏省研究生科研与实践创新计划项目(KYCX21_0496);中央高校基本科研业务费教师项目(B210202050);浙江省浙江省交通厅科技计划项目(2021043)。

摘　　要：厂拌热再生沥青混合料由于其材料组成复杂且施工和易性较差,容易出现集料分散不均匀问题。基于此,制备不同RAP料掺量和沥青类型的厂拌热再生混合料旋转压实试件,首先采用数码相机获取试件截面的图像,通过图像处理技术对集料等结构进行识别;然后将图像内的最大内接正方形划分为面积相等的16个小方格,基于对方格集料面积比的正态分析提出均匀性评价指标H值。结果表明:基于方形区域划分提出的均匀性指标能有效评价混合料中集料的分散均匀性,再生混合料的均匀性低于新沥青混合料;不同RAP掺量下,相比于普通新沥青,采用泡沫新沥青制备的再生混合料均匀性至少高11%。Due to the complex material composition and poor construction workability of plant-produced RAP mixtures,the problem of inhomogenous aggregate dispersion is easy to occur.Based on this,the rotating compaction test pieces of plant-produced hot recycled mixture with different RAP content and asphalt types were prepared.Firstly,the digital camera was used to obtain the image of the specimen section,and the aggregate and other structures were identified by image processing technology.Then,the largest inscribed square in the image was divided into 16 small squares with equal area.Based on the normal analysis of area ratio of aggregates to each unit grid,aggregate homogeneity index(H value)was proposed.The results show that the homogeneity index based on the square area division can effectively evaluate the dispersion homogeneity of the aggregate in the mixture.The homogeneity of the recycled mixture is lower than that of the new asphalt mixture.Under different RAP content,compared with ordinary new asphalt,the homogeneity of recycled mixture prepared with foamed new asphalt is 11%higher at least.

关 键 词：道路工程 厂拌热再生沥青混合料 均匀性 数字图像处理技术 泡沫沥青 区域划分 

分 类 号：U416[交通运输工程—道路与铁道工程]