Latex modified Portland cement overlays : an analysis of samples removed from a bridge deck.

Details

• Creators:
  Hilton, Marvin H ; Walker, Hollis N ; McKeel, Wallace T
• Corporate Creators:
  Virginia Highway & Transportation Research Council
• Subject/TRT Terms:
  • Latex modified concrete
  • Pavements--Overlays
  • Portland cement--Cracking
  • Portland cement--Additives
• Publication/ Report Number:
  VHTRC 76-R25
• Resource Type:
  Tech Report
• Geographical Coverage:
  Virginia
• Corporate Publisher:
  Virginia Transportation Research Council (VTRC)
• Description:
  This report describes an evaluation of the latex modified mortar overlay the Route 85 (NBL) bridge over the Roanoke River. While the performance of the overlay has been generally satisfactory, corings and chloride analyses indicate the possibility of future distress beyond the cracking that has been noted to date The problems associated with the overlay have not resulted from the nature of the latex modified mortar nor from a failure of bond between the material and the original deck. Instead the results suggest that the deterioration is due to the use of a insufficient thickness of overlay in conjunction with the inadequate preparation of an original deck that had been previously subjected to chloride penetration. Based on the evaluation of several cores taken from the deck it cannot be recommended that thin layers of this material be used as a long-term solution for bridge deck deterioration problems where the decks have experienced prior corrosion of the reinforcing steel from chloride attack.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/19885/dot_19885_DS1.pdf
• File Type:
  [PDF - 3.82 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8756037ac325ebd78c654ed00df98524bfe1c3eb788fb7896a78dda887457c185e0487a7c9f434f263ea0d2e2575a859ab606df6ed16ea5ad59057d05ad82ed7