Steel plates 6 mm thick and 250 mm wide are being glued to soffits and decks to overcome the lack of reinforcing steel in two defective bridges at the m20-m25 interchange. The bridge design was completed before the introduction of technical approval procedures in 1973. A test sample from each mix of the ciba-geigy xd800 epoxy resin is used to glue four pieces of steel together. A tensometer is used to check shear strength of the adhesive. Grit blasting and cleaning is carried out immediately before glueing and rustproofing after the adhesive has set. Falsework and wedges are used to support the plates under the bridge. Three layers are being placed above and below the deck. Up to 21 rows of plates are being laid over 12 M lengths along the decks. Dynamic deflection tests are to be carried out at the completion of each job. It is hoped that the method will prove to be a speedy and effective way of adding steel to concrete slabs. /TRRL/


  • English

Media Info

  • Features: Photos;
  • Pagination: p. 18-19
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00164228
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 14 1978 12:00AM