PRESTRESSING: PART 1. TENDONS AND DUCTS - MATERIALS, HANDLING AND INSTALLATION

The information presented on tendon materials, wire, strand and box is based on draft British standards expected to be published in 1979. These standards, based on the Euronorm EU138 are described as representing widespreed practice. The production of tendon materials is described, and reference made to stress relieving heat treatments to avoid problems associated with materials available in the as-drawn condition:- they do not pay out straight, have a low limit of proportionality and high relaxation. Cold worked high tensile prestressing bars, smooth or ribbed, with rolled on threads are quoted as being supplied in lengths of up to 18 M to the requirements of BS 4486:79. Data on the sizes and properties of wire, seven wire strands and bars are presented in tabulated form. Particular attention is given to storage, fabrication and installation, and recommended techniques are described in each case. The installation of tendon materials into ducts is detailed, with particular reference to adequate support and positive location for the ducts to maintain the correct profile. It is suggested that site prestressing problems are often caused by damaged or inadequately fixed ducts, and recommended precautionary measures are described. (TRRL)

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Publication Date: 1979-5

Media Info

  • Features: Tables;
  • Pagination: p. 33-34
  • Serial:
    • CONCRETE
    • Volume: 13
    • Issue Number: 5
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00310293
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jul 22 1980 12:00AM