1. Scope

Keywords

Rationale

Traditional methods such as sieve analysis and manual shape classification remain widely used and effective, but they have limitations. While well standardized for measuring particle size, they offer limited insight into particle shape and surface features. In contrast, image-based methods enable more frequent and objective measurements, providing richer data on particle characteristics. This standard provides a method for capturing appropriate digital images of coarse aggregate and outlines how to calculate standardized size and shape metrics such as aspect ratio, angularity, flatness, and more. These definitions support consistent communication and reduce confusion between research and industry, where terminology and calculation methods often differ. The method accommodates various imaging setups and does not require major changes to existing workflows. It is intended to complement traditional tests, offering an additional tool to improve understanding of aggregate variability and support better quality control.