An aggregate is an essential part of making concrete and is used for many different reasons.In concrete, an aggregate is used for its economy factor, to reduce any cracks and most importantly to provide strength to the structure.
- Aggregates are used as the base, subbase, and/or surface of roads in several forms
- In roads and railway ballast, it is used to help distribute the load and assist in ground water running off the road.
- Increases the volume of concrete, thus reduces the cost. Aggregates account for 60-75% of the volume of concrete and 79-85% weight of PCC
- Provide dimensional stability
- Influence hardness, abrasion resistance, elastic modulus and other properties of concrete to make it more durable, strong and cheaper.
- Other uses include fills, backfills, and drainage and filtration applications.