FIELD EVALUATION OF MARYLAND MIX #8 OVERLAY ON BRIDGE DECKS. INTERIM REPORT

The research work performed by the Maryland State Highway Administration in cooperation with the FHWA showed that Maryland Mix #6, currently used for new bridge deck construction, is as good as LSDC and LMC. Maryland Mix #6 was modified so that it can be used for overlay purposes. This mix was designated as Maryland Mix #8. To date Mix #8 overlay has been placed on three bridge decks all of which have been in service for less than two years. The two years of performance indicated no delamination (good bond) and good resistance to the chloride penetration. However, since all three decks have shown different behavior to date, with respect to the corrosion activity, no conclusion can be made for corrosion of embedded rebars. Plastic shrinkage cracks are visible on the Route 118 bridge but are not detrimental at this stage. Rideability of all three decks is good.

• Corporate Authors:

  Maryland Department of Transportation

  2323 West Joppa Road
  Brooklandville, MD  United States  21022

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Parikh, J
• Publication Date: 1992-8

Language

• English

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 51 p.

Subject/Index Terms

• TRT Terms: Admixtures; Bridge decks; Chlorides; Concrete; Concrete overlays; Corrosion; Cracking; Delamination; Pendulum tests; Performance evaluations; Reinforcing bars; Ride quality; Shrinkage
• Uncontrolled Terms: Bonded concrete overlays; Rebars
• Old TRIS Terms: Rideability; Shrinkage cracks
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00625383
• Record Type: Publication
• Report/Paper Numbers: FHWA/MD-86/06
• Contract Numbers: AW089-308-046
• Files: TRIS, USDOT, STATEDOT
• Created Date: Nov 23 1993 12:00AM