Particle shape is important to the suitability of the
aggregates with respect to their usage in several engineering
materials. Elongated particles compared to cubic particles
have a tendency to break along their long axis. Thus particleform affects the strength of the aggregates and life expectancy
of the materials such as concrete, asphalt, and railroad
aggregate. Spherical particles result in good rheological
character in contrast to platy particles that deter the
rheological character of concrete paste. Aggregates with a
rough surface compared to a smooth surface will bind more
securely in both asphalt and concrete.