For Concrete the Aggregate Shape is generally rounded.
The reason: Improved workability and to reduce internal friction during Mixing, Pumping and Placement. Also helps uniform Strength.
Types: River Rock and crushed stone with controlled surfaces.
Texture is mostly smooth.
Road Base Aggregates
Shape: Typically angular and irregular.
Reason: Angular particles interlock better under compaction, providing higher stability and strength for load-bearing purposes. Texture: Often rough, which provides stability and prevents displacement.