铁道科学与工程学报2025，Vol.22Issue(3)：1112-1120,9.DOI:10.19713/j.cnki.43-1423/u.T20240791
基于主成分分析的物理整形对再生粗骨料形貌特征影响的研究
Influence of physical shaping on morphological characteristics of recycled coarse aggregates based on principal component analysis
摘要
Abstract
Physical shaping(PS)is an important method for strengthening recycled coarse aggregates(RCA).In order to further evaluate the influence of PS on the morphology characteristics of RCA and provide basic research for the production,preparation and high-quality utilization of RCA,the influence of PS on the physical properties of RCA was studied.The typical morphological parameters of the RCA at different PS time was investigated by aggregate image measurement system(AIMS).Based on principal component analysis method,circularity,sphericity,elongation ratio and flatness ratio were combined into integral morphological factor,and angularity,texture and fractal dimension were combined into surface morphological factor.Results show that PS can significantly reduce the voidage,water absorption and crushing index of RCA,and improve the properties of RCA.With the increase of PS time,the integral morphological factor increases,and the surface morphological factor decreases first and then increases.When the integral morphological factor of RCA increases,the shape of RCA tends to be more spherical,and the packing density of aggregate is good.The increase of the integral morphological factor is the main reason for packing voidage decreasing.With the decrease of surface morphological factor,the surface morphology of RCA tends to be regular more and more.PS makes the integral shape of RCA more spherical than that of natural aggregate but cannot make the surface shape of RCA more regular than natural aggregate.Moreover,with the increase time of PS,RCA can be broken more than once to lead to the surface of the RCA more irregular,resulting in the surface morphological factor increasing.Therefore,it is suggested that the PS time should be adjusted by the change of surface morphological factor of RCA.关键词
再生粗骨料/物理整形/形态特征/主成分分析Key words
recycled coarse aggregates/physical shaping/morphological characteristics/principal component analysis分类
建筑与水利引用本文复制引用
申景涛,黄新宇,马昆林,谢友均,龙广成,胡明文..基于主成分分析的物理整形对再生粗骨料形貌特征影响的研究[J].铁道科学与工程学报,2025,22(3):1112-1120,9.基金项目
长沙市科技计划重点研发项目(kh2005213) （kh2005213）
中铁城建集团有限公司科技计划项目(2023-1A) （2023-1A）
