Pulverised Fuel Ash

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Pulverised Fuel Ash is a pozzolanic additive, extracted from spent fuel hoppers of coal fired boilers and ground to a fine powder. Pozzolans are materials that are not themselves cementitious, but contain constituents which react with lime at ordinary temperatures in the presence of water to form stable hydraulic compounds.

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Environmental Considerations

Conforms to BS EN 450. Grade N.

Usage/Purpose

PFA is used in pozzolanic grouts and to increase strength and improve long-term durability of lime mortars.

Shelf Life

Indefinite stored in dry conditions.

Finish

Fine grey powder. (Batch colour varies slightly)

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.

Availability

Ex.Stock. Indefinite stored in dry conditions. 20kg bags.