As a bound application of pulverised fuel ash, a byproduct of the coal-fired power plant industry, the material is sometimes used as a cementitious element in concrete.
This can see it added to Portland cement, as a raw material in kiln feeds or used as a filler aggregate, the Environment Agency says.
All of these applications are now covered by the quality protocol, which separately also looks at unbound applications of fuel ash.
The documentation aims to remove the ambiguity surrounding when fuel ash ceases to be a waste product and has instead been reincorporated into a new material, enhancing sustainability and reducing the amount of ash sent to landfill sites.
According to the Environment Agency, this is important as it affects whether Waste Management Regulations must be applied to the handling of the material.
Posted by Andrew Miles