ABSTRACT
Aggregate morphology is an important part of concrete at meso-scale. In this study, a numerical method is proposed to model the coarse aggregate based on 3D point cloud and spherical harmonics. A total of 200 aggregates, including 100 pebbles and 100 crushed-stones, are collected by using the 3D point cloud technology. The aggregate is constructed by the spherical harmonics using 3D point cloud data. A typical example of a crushed-stone is presented to verify the feasibility of the proposed method. The distortion coefficient is defined to measure the similarity between the modeled and real aggregates. The effects of the sampling point number and calculation order on the accuracy of modeling the aggregate are investigated. The results show that proposed method has a promising application to establish a huge database of real aggregate shapes.
