华中科技大学学报（自然科学版）2017，Vol.42Issue(2)：29-33,5.DOI:10.13245/j.hust.170206
粗集料表面纹理粗糙度的多重分形评价
Multi-fractal evaluation on roughness of coarse aggregate surface texture
摘要
Abstract
Texture roughness of 6 aggregates (diorite,diabase,granite,etc.sizes of 9 .5~1 3 .2 mm, 1 3 .2~1 6 .0 mm)were studied based on multi-fractal theory.Subj ective evaluation on the surfaces was obtained with a microscope (60X),and then aggregates′surface profile were measured by laser profil-ometer.To verify the multi-fractal characteristic of surface texture,high-pass butterworth was used to filter the surface texture roughness from the profiles.The relationship was finally analyzed between the spectrum widthΔαand polishing stone value pPSV .The results show that the multi-fractal spec-trum parameters are more detailed characterization for surface roughness,Δαquantifies the uneven distribution of aggregate surface globally andΔf characterizes the ratio of peak and valley of aggregate surface locally;the spectral widthΔαhave a good linear correlation with pPSV (the fitting goodness is 0.84),the higher pPSV is,the widerΔαis;it is feasible that multi-fractal spectrum evaluates rough-ness of aggregates surface texture,so it will provide fast and comprehensive evaluation method for practical engineering application.关键词
道路工程/表面纹理/多重分形/粗集料/磨光值/激光轮廓仪Key words
road engineering/surface texture/multi-fractal/coarse aggregate/polishing stone value/laser profilometer分类
交通工程引用本文复制引用
周兴林,肖神清,肖旺新,冉茂平..粗集料表面纹理粗糙度的多重分形评价[J].华中科技大学学报（自然科学版）,2017,42(2):29-33,5.基金项目
国家自然科学基金资助项目(51578430,51378243) （51578430,51378243）
湖北省自然科学基金重点资助项目(2015CFA064) （2015CFA064）
湖北省科技支撑计划资助项目(2014BEC055) （2014BEC055）
