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。
Abstract
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 of λ was 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
Key words
crushed coarse aggregate /
digital image processing method /
particle shape /
flatness ratio /
correction factor
黄亚梅, 王立华, 陈锡容.
基于DIP技术的碎石粗骨料粒形测试与修正[J]. raybet体育在线
院报. 2018, 35(4): 129-133 https://doi.org/10.11988/ckyyb.20170147
HUANG Ya-mei, WANG Li-hua, CHEN Xi-rong.
Comparative Study of Particle Shape of Crushed Limestone Coarse Aggregate by Digital Image Processing and Caliper Gauge[J]. Journal of Changjiang River Scientific Research Institute. 2018, 35(4): 129-133 https://doi.org/10.11988/ckyyb.20170147
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参考文献
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