Pulverized-fuel ash, PFA, is a product derived from waste produced by a coal-fired power plant. The extensive use of PFA in concrete in Hong Kong today has resulted from the availability of suitable quality PFA. GIC supplies consistent quality, particularly in low Loss on Ignition (LOI) PFA which can partially replace cementitious material and provide additional performance similar to PPFAC.

PFA provides an alternative way for concrete producers to produce concrete with different characteristics based on different specific project requirements.

It is used for concrete with normal Portland cement (ordinary and rapid hardening) as an admixture. The range of structures in which PFA has been used in building bridges, roads, dams, power stations and multi-storey buildings as well as the paving, floors, foundations and walls of single storey dwellings.