A unique form of two-course construction--placement of a 51-mm (2-in) wax-bead concrete overlay on a fresh, conventional-concrete lower course after a 1-h wait period--was used in construction of a bridge deck near Seattle, Washington. Construction and evaluation of test slabs before placement of the deck showed that the direct tensile bond developed between the two courses was as great as the direct tensile strength of the wax-bead concrete. Other test-slab construction and evaluation work showed that the more conventional approach of placing a 51-mm overlay on a 1-d-old hardened lower course (after a water-and-sand blast and grout placement) also resulted in adequate bond. Cores evaluated after construction and heating of the deck confirmed the adequacy of the bond and the complete sealing of the top 13 to 25 mm (0.5 to 1.0 in) the concrete overlay. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 10-15
  • Monograph Title: Construction and quality control of pavements and structures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00184205
  • Record Type: Publication
  • ISBN: 03026814
  • Files: TRIS, TRB
  • Created Date: Dec 29 1978 12:00AM