Image texture analysis to evaluate the microtexture of coarse aggregates for pavement surface courses

被引:10
作者
Roy, Nabanita [1 ]
Kuna, Kranthi Kumar [1 ]
机构
[1] Indian Inst Technol Kharagpur, Dept Civil Engn, Kharagpur, W Bengal, India
关键词
Pavement microtexture; aggregate surface texture; image analysis; wavelet analysis; 3D optical surface profilometry; MICRO-TEXTURE; SKID RESISTANCE;
D O I
10.1080/10298436.2022.2099854
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The microtexture of the asphalt pavement, which is critical for the skid resistance, is dictated by the microtexture of the coarse aggregates used in the surface courses. The existing standard test methods can only capture the combined measure of coarse aggregate surface texture which can be influenced by other aggregate characteristics such as shape and angularity. Consequently, the surface texture of aggregates cannot be quantified explicitly using these tests, and therefore image analysis methods that can extract textural features are gaining more significance. In the present study, various image texture analysis methods are evaluated to identify a reliable texture indicator. Methods include traditional statistical approaches such as histogram method, Grey Level Co-occurrence Matrix (GLCM) methods, and transform-based wavelet texture analysis. The image analysis was carried out on the grey-scale scanning electron microscope (SEM) images before and after accelerated polishing. To compare the image texture parameters, the average surface roughness (S-a) measured from aggregate surface profile data obtained from a 3D Optical Surface Profilometer (3D OSP) was considered as a direct measure of surface texture. A detailed correlation analysis with S-a indicates that the surface texture index (STI) from the wavelet analysis quantifies the microtexture more accurately compared to statistical methods.
引用
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页数:15
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