noun
- siliceous or aluminous materials that react with lime in the presence of water to form compounds with cementing properties
Usage: technical; construction/engineering
Examples
- Fly ash and silica fume are common pozzolans used in concrete production.
- The addition of pozzolans can improve the durability of concrete structures.
- Natural pozzolans include volcanic ash and certain clays.
- Engineers often specify pozzolans to reduce the permeability of concrete.
- The Romans used volcanic pozzolans in their concrete constructions.
- Modern pozzolans help reduce the carbon footprint of cement production.