Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a hydraulic cementing medium to produce either concrete or mortar.
Those particles passing the 9.5 mm (3/8 in.) sieve, almost entirely passing the 4.75 mm (No. 4) sieve, and predominantly retained on the 75 µm (No. 200) sieve are called fine aggregate
Purpose & Uses
- Increases the volume of concrete, thus reduces the cost
- Provide dimensional stability
- Influence hardness, abrasion resistance, elastic modulus and other properties of concrete to make it more durable, strong and cheaper.