基于DIP技术的碎石粗骨料粒形测试与修正  

Comparative Study of Particle Shape of Crushed Limestone Coarse Aggregate by Digital Image Processing and Caliper Gauge

作　　者：黄亚梅[1] 王立华[2,3] 陈锡容[2,3] HUANG Ya-mei;WANG Li-hua;CHEN Xi-rong(Water Conservancy Department,Guangdong Technical College of Water Resources and Electric Engineering,Guangzhou 510635,China;Structural Materials Department,Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,China;Guangdong Research Center of New Material and Structure in Water Resources Engineering,Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,China)

机构地区：[1]广东水利电力职业技术学院水利系,广州510635 [2]广东省水利水电科学研究院结构材料所,广州510610 [3]广东省水利水电科学研究院,广东省水利新材料与结构工程技术研究中心,广州510610

出　　处：《长江科学院院报》2018年第4期129-133,共5页Journal of Changjiang River Scientific Research Institute

基　　金：广东省水利科技创新项目(2014-04)

摘　　要：骨料粒形对混凝土的工作性能和力学性能具有重要影响,但骨料颗粒为不规则形状,难以充分定义及度量,对混凝土的影响也无法精确评价。为了精确测量骨料粒形,运用数字图形处理(Digital Image Processing,DIP)技术研究了灰岩碎石粗骨料的粒形和粒径,并与游标卡尺测量结果进行比较。研究发现,数字图形处理技术测量得到的碎石骨料的长度、宽度以及长径比与游标卡尺测量值相等,无需修正,但厚度、扁平比、球度以及粒形因数与游标卡尺测量值差异显著,需要对扁平比λ进行修正,修正系数为1.82,修正后两者偏差在2%以内。Aggregate shape greatly affects the workability and mechanical properties of concrete.Nevertheless,the irregular shape of aggregate particle defies full definition and measurements.In this article,the particle shape and particle size of crushed limestone coarse aggregate were studied with Digital Image Processing(DIP)method,and the results were compared with the values measured by caliper gauge.Results revealed that the length,width and length-diameter ratio measured by the two methods were almost equal;but the thickness,flatness ratio,sphericity and the grain shape factor obtained by the DIP method varied remarkably.The value ofλwas corrected,and the correction factor was 1.82.The deviation of the corrected results was less than 2%.

关 键 词：碎石粗骨料 DIP技术 粒形 扁平比 修正系数 

分 类 号：TU528.44[建筑科学—建筑技术科学]