Pozzolans

Pozzolan is a finely powdered material which can be added to lime mortar to increase durability and, in the case of lime putty mixes, to provide a positive set.

The addition of pozzolan to any lime mortar (hydraulic or non-hydraulic) will modify its characteristics. Pozzolanic materials can combine with uncarbonated lime (calcium hydroxide) to form stable compounds, thus reducing the risk of early leaching or frost damage and increasing the potential durability of the mortar. Depending on the type of pozzolan chosen, the density and compressive strength of the mortar may be increased and porosity reduced. 

Products available are:

Argical M- The Argical^™-M range provides a broad range of benefits in lime mortars and plasters, range of metakaolins are manufactured through the calcination of kaolin to form an amorphous pozzolanic white mineral additive. 

This material is gauged at 10:1 by volume.