Current technical issues for aggregates

Issues currently under examination in connection with the aggregates used in the manufacture of concrete are discussed. The CE marking of aggregates is not mandatory under UK law but the industry maintains large databases of CE marks and other information which can be supplied on request. The problems in using recycled aggregates in concrete include unfavourable economics and the lack of reliably large supplies of material. Aggregates are the subject of interest in the area of dangerous substances but it is suggested that once incorporated into concrete they do not present a hazard. Similarly the Registration, Evaluation and Authorisation of Chemicals law regarding the safety of chemicals may require the registration of aggregates. Current standards for aggregates are based on end use with the result that the same aggregate may have different specifications for similar uses. Work is being carried out to establish whether a more consistent approach can be adopted. Conformity criteria for aggregates are under review with the likelihood of a choice of 3 methods of evaluation being offered, the choice depending the individual property. The replacement of the Construction Products Directive with the Construction Products Regulation will align the regulation of products across Europe and include installation, demolition and after use.

Language

  • English

Media Info

  • Pagination: 14-16
  • Serial:
    • CONCRETE
    • Volume: 43
    • Issue Number: 6
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 01147009
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 24 2009 8:37AM