Physical requirements for aggregates

Physical requirements for aggregates

Aggregates into categories covering:

·     Resistance to splitting

·     Resistance to wear

·     Resistance to polishing and abrasion

·     Particle density and water absorption

·     Bulk density

·     Durability

Durability

This is mainly associated with the frost and freeze/thaw resistance of coarse aggregates, which must be adequate for the specified purpose and must be verified if necessary.

Alternative aggregates (recycled material)

Large natural gravel and sand deposits are often valuable, non-renewable resources. It is becoming increasingly impossible to obtain and use gravel from these natural areas.

Possible substitutes are:

·     Crushing and processing of old concrete to form concrete granules

·     Reuse of micro fines from concrete wash water installations The suitability of recycled material should preferably be checked in every case.