New WRAP Guidance on the Quality Protocol requirements for
the production of aggregates from inert waste:
|Guidance Notes for the Producers' Compliance
|Guidance Notes to the Purchasers'/Specifiers'
Recycled and secondary aggregates are making an increasingly
important contribution to the UK's needs.
By reducing demand on primary aggregates, they are helping the
industry to become more sustainable - in other words, not using
up assets today that our children may need tomorrow.
The industry is enthusiastically supporting the Government's
drive to bring more recycled aggregates into play and, by 1999,
had already exceeded the target set for 2001. It is well on its
way to beating the 55 million tonne-a-year goal set for 2006.
Significantly, Britain has sailed ahead of previous leaders
Holland in the European recycling league. While the Dutch manage
to satisfy 14.6 per cent of their aggregate needs through recycling,
we are close to 17 per cent. Third-placed Germany achieved just
half that figure.
Materials suitable for use as recycled or secondary aggregates
fall into two broad groups:
- Demolition and construction materials - some 60 per cent
are already used as aggregates and fill
- Industrial by-products such as:
- colliery spoil - widely used for bulk fill
- china clay waste - used in some areas as mortar and concreting
- power station ash (PFA) - used as a cement substitute
and for block making
- blastfurnace slag from the iron and steel industries -
used as aggregates and cementitious materials
The challenges that go with recycled and secondary aggregates
- environmental - recovery of some wastes that
have become part of a local landscape can have environmental
consequences. Slate tips are an example
- technical - quality constraints have to be
considered. An absence of adequate technical specifications
has inhibited wider use of recycled materials to date
- economic - recycling isn't always cheaper.
Transport costs, for example, can make recycled aggregates prohibitively
expensive in some areas.
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to provide information and guidance on UK issues, products and
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