铁道科学与工程学报2018，Vol.15Issue(1)：52-63,12.
埃塞俄比亚铁路火山渣填料颗粒形状特征分析
Particle shape characteristic analysis of cinder filling in ethiopian railway
摘要
Abstract
Cinder consists of irregularly shaped and porous particle, and it is formed by volcanic magma while it erupted in the air. The particle shape characteristics have a profound impact on engineering property of material. By means of optical microphotography technique, the particle planar projection of cinder filling has been acquired. Using digital image processing technology to measure particle's geometric parameters, and then get the shape index which is used to describe particle's shape and angularity, on the method of mathematical statistics analysis, the influences of particle size variation on the particle's outline shape and angularity are discussed,and the significance test of shape index changes in groups and discreteness in groups also have been analyzed. Studies have shown that: cinder is a particle material. Its shape is blocky and its surface is roughness; The aspect and length to width ratio represent particle's outline shape. It shows no significant change while particle size changes, and the particle's outline shape demonstrates no different between groups. The angularity coefficient, roughness and factual dimension which represent particle's angularity increase with the decrease of particle size, and the particle's angularity is enhancing; The test statistic F of coefficient of variation are more bigger than length to width ratio, angularity coefficient's test statistic F and coefficient of variation are more bigger than roughness and factual dimension, so aspect and angularity coefficient have a higher distinguishing degree for outline shape and angularity of cinder respectively.关键词
埃塞俄比亚铁路/火山渣填料/颗粒形状特征/几何参数/形状指数Key words
Ethiopian railway/cinder filling/particle shape characteristics/geometric parameter/shape index分类
建筑与水利引用本文复制引用
梁多伟,罗强,刘钢,谢宏伟,方东,蒋良潍..埃塞俄比亚铁路火山渣填料颗粒形状特征分析[J].铁道科学与工程学报,2018,15(1):52-63,12.基金项目
国家重点基础研究发展计划(973计划)资助项目(2013CB036204) （973计划）
中铁二局股份有限公司科技开发计划资助项目(2013) （2013）
