PRESTRESSED CONCRETE - FRICTION LOSSES DURING STRESSING

The report presents a review of information and data on factors influencing friction losses during prestressing and draws particular attention to two very important factors: workmanship and tendon surface condition. In part 1, the available data on friction coefficient and 'wobble' factor are examined and values are proposed for use in design. Some further test results examining the effects of tendon type and surface condition are presented in part 2. Part 3 summarises tests undertaken to examine the effect on serviceability and ultimate load of beams with incomplete bond between tendon and grout, arising, for example, from incomplete removal of a protective oil film applied to A tendon. Part 4 is a guide to good practice in post-tensioned concrete construction and includes precautions to be taken during the storage, handling and positioning of tendons, and recommendations for site tensioning and for subsequent grouting operations. /TRRL/

  • Availability:
  • Corporate Authors:

    Construction Industry Research & Information Assoc

    6 Storey's Gate
    London SW1P 3AU,   England 
  • Publication Date: 1978-2

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00179985
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0 86017 066 7
  • Report/Paper Numbers: Report No. 74 Monograph
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM