CONCRETE OVERLAYS FOR BRIDGE DECK REPAIR

Tests were made on portland cement and resinous concrete overlays to determine their suitability as overlays for deteriorated concrete bridge decks. Direct shear strengths of overlays bonded with epoxy, portland cement grout, and latex-modified cement grout were compared with those applied with no bonding agent. Freeze-thaw tests were made to determine durability of bonding agents and of overlay concretes. Load tests were made on 8-ft. span beams to determine the stiffening effect of overlays and the effect of repeated loadings on overlaid beams. Durability was studied further by gradually lowering laboratory temperature to 20 F during periods of repeated load applications. Low frequency and low amplitude vibrations were maintained on one beam by cyclic loading during placement and cure of a 1-1/2-in. overlay to simulate vibration due to traffic on a lane adjacent to the one being overlaid. Shear bond strengths ranged from 214 to 668 psi. Epoxy and portland cement grout bonding agents withstood the ASTM C 290 test without failure. Two of three overlays of latex-modified cement concrete came unbonded during the ASTM C 290 test. Latex-modified cement concrete overlay provided better freeze-thaw scale resistance than did other materials. No overlay failed in any way, except for tension cracks, in 2 million cycles of load.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 93-104
  • Monograph Title: Bridge design, construction and repair
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00043908
  • Record Type: Publication
  • Report/Paper Numbers: ISBN 0-309-02072-7
  • Files: TRIS, TRB
  • Created Date: Jun 1 1973 12:00AM