Shape Properties of Natural and Crushed Aggregate using Image Analysis

The importance of the shape of aggregate particles is well recognized due to their mechanical behavior. Durability, workability, shear resistance, tensile strength, stiffness, and fatigue response of concrete and asphalt concrete is heavily depend on the shape of aggregate particles. In recent years, image analysis is widely used to analyze the particle shape characteristics of aggregate. In this research, shape properties of natural river and crushed basalt aggregate were compared using image analysis by determining the shape characteristics of aggregate such as aspect ratio, elongation, flatness, form factor, roundness, shape factor, and sphericity. Additionally, the area-perimeter technique was used to predict the fractal dimensions of aggregates. As a result, the difference between shape properties of natural and crushed aggregate was mentioned by image analysis in this study.