Pozzolans are a broad class of siliceous or siliceous and aluminous materials which possess little or no cementitious value; yet, in the presence of water, they will react chemically with calcium hydroxide at ordinary temperature to form compounds possessing cementitious properties. They can be of natural or artificial origin.
Pozzolana name has its origin in the town Pozzuoli, Italy, situated near Mt. Vesuvius, where the Romans mined the product more than 2,000 years ago for construction applications.
Pozzolana are used a cementitious material replacement (or addition), as well as part of the raw meal as a clinker corrective or as a super fine aggregate.
Pozzolana would typically bring higher cement strength, better clinker reactivity, lower cost of raw mix, lower clinker production cost
ABT has experience in pozzolana sourcing, with network in the largest countries producing and exporting natural pozzolana.