Consultation outcome

Steel slag aggregates: ‘end of waste criteria’ quality protocol

This consultation has concluded

Detail of outcome

See the ‘Aggregate from waste steel slag: quality protocol’ published in response to the consultation.

Feedback received

Steel slag aggregate quality protocol: consultation response document

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Detail of feedback received

Steel slag aggregate quality protocol: consultation response document.

Original consultation


Seeking views on a quality protocol for the production and use of steel slag aggregates.

This consultation ran from

Consultation description

We would like to know what you think about the draft steel slag aggregate quality protocol. It sets out the criteria for how the aggregate should be produced so that it is no longer considered waste material. The quality protocol also includes the use of best practice in the production, processing, storage, handling, transportation and use of steel slag aggregate.

Steel slag is a waste material arising from the manufacture of steel, including stainless steel. Steel slag aggregate is a manufactured aggregate processed exclusively from steel slag.

If steel slag can meet the criteria in the protocol, it will be considered to be fully recovered and no longer subject to waste legislation. This will reduce the regulatory burden on the producers and users of steel slag aggregate.

Published 25 February 2014
Last updated 19 July 2016 + show all updates
  1. Added consultation outcome - link to previously published 'Aggregate from waste steel slag: quality protocol'.
  2. The Environment Agency online consultation tool has changed so the response document for this consultation has been republished directly onto GOV.UK.
  3. First published.