Crushed Brick and Tile
Finely ground clay brick and tile fired at low temperature (c.900°C) is a reactive artificial pozzolan. Pozzolans are not themselves cementitious, but contain constituents that react with lime at ordinary temperatures in the presence of water to form stable hydraulic compounds.
Finely powdered brick can be added to lime mortars to increase strength and improve long-term durability. Pozzolans react with free lime in mortar and lime efflorescence is therefore less likely. Porosity and permeability are both reduced.
Indefinite stored in dry conditions
Fine red/pink powder
To be mixed, normally as a slurry, with lime mortar immediately before use. Add at 5%, 7.5%, 10% or 15% (by volume to mortar) depending on site exposure and the particular circumstances. Do not remix setting mortar.
Ex stock. 25kg bags