State Key Laboratory of High Performance of Civil Engineering Materials 1 article published in JoVE Engineering Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ) Kai Lyu1,2, Wei She1,2 1School of Materials Science and Engineering, Southeast University, 2State Key Laboratory of High Performance of Civil Engineering Materials 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.
