RECYCLED MATERIALS FOR CONCRETE: A REPORT ON THE DUTCH EXPERIENCE

This article discusses the increased use of recycled materials for making concrete in The Netherlands, where there is more and more political and environmental opposition to the production of sand and gravel by means of dredging. Construction and demolition wastes are the most interesting materials which can be used as a secondary source for concrete aggregates. As it has become more expensive to dump materials, it has become more cost-effective to separate different materials at the demolition stage. Since 1984, there have been Dutch CUR-VB regulations covering the control and acceptance testing of crushed concrete aggregate (Recommendation 4) and crushed masonry aggregate (Recommendation 5). The main distinction between these types of crushed aggregate is determined by initial visual analysis and, more important, by the limiting value of 2100kg/m cubed for particle density. According to the Dutch specification, replacement of 20% of the coarse aggregate is allowed, and its application does not affect the properties of the resulting fresh and hardened concrete. From an economic and environmental viewpoint, replacing only 20% of the coarse aggregate by crushed aggregates is insufficient. For some applications, replacement proportions up to 100% should cause no problems. Rubble is a useful replacement for gravel in concrete.

  • Availability:
  • Corporate Authors:

    QUARRY MANAGERS' JOURNAL LTD

    7 REGENT STREET
    NOTTINGHAM,   United Kingdom  NG1 5BS
  • Authors:
    • DE VRIES, P
  • Publication Date: 1995-12

Language

  • English

Media Info

  • Pagination: p. 23-6
  • Serial:
    • QUARRY MANAGEMENT
    • Volume: 22
    • Issue Number: 12
    • Publisher: QMJ PUBLISHING LTD
    • ISSN: 0305-9421

Subject/Index Terms

Filing Info

  • Accession Number: 00720804
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, ATRI
  • Created Date: May 24 1996 12:00AM