Hadrians Wall

Crushed Brick & Tile

RJ7.03

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.

Usage/Purpose: 

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.

Finish: 

Fine red/pink powder

Shelf Life: 

Indefinite stored in dry conditions

Availability: 

Ex stock. 25kg bags

Health & Safety: 

Fine powders of nuisance dust classification. Use gloves, overalls, facemasks and respiratory protection as appropriate to working environment.

Technical Specification: 

Pozzolans RJ 7.01

P.F.A RJ 7.09

Trass RJ 7.05

G.B.F.S. RJ 7.02

Argical M1000 RJ 7.04

Use of Ordinary Mortar RJ 2.03

Lime Putty Renders RJ 2.09

Observations: 

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.