Abstract
The genesis of gravel deposits and rocks cause large differences in grain-shape and grain-size distributions of
aggregate products and these differences are most pronounced in the fine material. Quantification of fine material
properties is essential for the ability to control the physical properties of the products in which the material is used,
such as in concrete and asphalt.
This paper presents a method for the characterization of the fine fraction of natural and crushed aggregates, using
image analysis. The aim of the characterization is to investigate the differences in particle shape and size distribution
among a wide range of natural and crushed fine aggregate materials. In a following project these properties will be
related to the rheological properties of fresh concrete, with an aim to improve concrete proportioning procedures.
The study involved materials from 26 different gravel pits and rock quarries from different parts of Sweden. The
samples were sieved and prepared for image analysis. Material