FLUID MICROCONCRETE

This article discusses the development, properties, and application of fluid microconcrete. 'Fluid microconcrete' can be defined as a formulated concrete mix, which flows easily into confined spaces, and contains relatively small aggregate, with maximum particle size about 6mm. Its fluidity, flow retention, and freedom from segregation and bleed make this type of concrete repair material very useful and versatile. It was originally developed in the early 1980s to repair chloride-contaminated concrete crosshead beams on a raised motorway system in the UK. A large part of each beam needed repair, but the congested reinforcement, contained in the beams, made conventional repairs difficult. The use of highly fluid microconcrete solves this problem by allowing the concrete to surround the reinforcing bars completely. As large amounts of fluid microconcrete are used for each repair, it is prudent to control its alkali content, to avoid alkali-silica reaction. Low permeability to chloride, water, and carbon dioxide are very important features of fluid microconcrete. To ensure long-term integrity of the repair, the concrete substrate must have a good bond. Application of fluid microconcrete requires an adaptation of more traditional formwork for use in repair situations, and the article discusses its practicalities.

  • Availability:
  • Corporate Authors:

    PALLADIAN PUBLICATIONS LTD

    THE OLD FORGE
    ELSTEAD, SURREY  United Kingdom  GU8 6DD
  • Authors:
    • DECTER, M H
    • GALLIVAN, C
    • Gordon, K
  • Publication Date: 1995

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 28-31
  • Serial:
    • CONSTRUCTION REPAIR
    • Volume: 9
    • Issue Number: 4
    • Publisher: PALLADIAN PUBLICATIONS LTD
    • ISSN: 0967-0726

Subject/Index Terms

Filing Info

  • Accession Number: 00723185
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jul 26 1996 12:00AM