Hereby, we proposed a protocol to illustrate the effect of aggregate surface morphology on the ITZ microstructure. The SEM-BSE image were quantitatively analyzed to obtain ITZ's porosity gradient via digital image processing and a K-means clustering algorithm was further employed to establish a relationship between porosity gradient and surface roughness.
Lyu, K., She, W. Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ). J. Vis. Exp. (154), e60245, doi:10.3791/60245 (2019).