More Views


Availability: In stock

These finely ground materials containing reactive silica and alumina can be added to fat limes to induce a partial hydraulic set.
Every effort has been made to ensure the accuracy of the colour and texture of products on this website but due to the limitations of technology, we strongly recommend that sample products are purchased for testing in situ prior to the full order being placed.

Argical M - 1.5kg bags

£9.40 (Excl. VAT)

Argical M - 25kg bags

£38.45 (Excl. VAT)


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. In general, the softer pozzolanic materials (such as brick dust from clay bricks fired at less than 950°C) will produce more permeable and flexible mortars, whilst the hard-burned materials, such as Blast Furnace Slag, will tend to produce a harder mortar, closer in its characteristics to cement.

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.

Technical Documents
View FileArgical - Safety Data Sheet    Size: (612.69 KB)

tickIncreases durability

tickHelps to aid a positive set

tickReduces the risk of early leaching or frost damage

tickIncreases the potential durability of the mortar

tickAddition of Brickdust produces more permeable and flexible mortars

tickBlast Furnace Slag produces a harder mortar


Where can I find out more about Pozzolans?

For detailed information about the use of Pozzolans for lime mortars, see: