More processing sites, a code of practice, an independent advisory bureau to promote end-use, and a government lead in achieving practical utilisation, are key recommendations of a study of construction materials recycling carried out for the Department of the Environment. Of some 70m tonnes of demolition and construction industry wastes generated annually in the UK, about 37 percent or 26m tonnes is not recycled in any form. In con-finning estimates established in 1991, the study finds that of the 44m tonnes recovered in some manner, no more than 2.8m tonnes is recycled as secondary aggregate. Virtually all the rest is untreated or coarsely crushed and used as low-grade fill or as sub-base in road construction. The authors call for output of graded secondary aggregate to be doubled by the year 2005, within an overall recovery target of 75 percent of total arisings - a 12 percent improvement.
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