AGGREGATES:

AGGREGATES:

Aggregates are the inert materials which when bound together by cement form concrete. They consist of materials such as pebbles, gravel crushed stone, sand etc.. Aggregates are commonly classified into sizes, fine and coarse. The material which retained on 4.75 mm IS sieve is classified as coarse aggregate. Whereas materials passing through this sieve is known as fine aggregate. Aggregates used for concrete work must be hard, strong, dense durable, clean and free from adherent coatings.