Stone Dusts and Pozzolans

Off white Metakaolin, a moderate pozzolan, best suited to retain the features of colour sensitive mortars. Please contact us regarding addition rates as it varies by application. Available in a 25kg bag.

A high quality blue slate stone dust, 0 to 1mm, typically used for sheltercoats.

Red crushed brick dust, typically seen as a very weak pozzolan. Brick Dust is also used as a colourant for mortars as well as a porous aggregate.

Low Sulphur Pulverised Fuel Ash, PFA, is a very fine dark grey powder which acts as a pozzolan but additionally darkens the colour of a mortar. Please talk to us regarding addition rates as it varies by application.

Trass is a natural pozzolan that has seen widespread use throughout northern Europe for hundreds of years, creamy beige in colour it’s a well-known Pozzolan derived from volcanic tuffs sourced from the Rhine Valley in Germany. Similar to the volcanic pumices and tuffs from Pozzuoli, the material established by the Romans.