AN UNUSUAL CASE OF SURFACE DETERIORATION ON A CONCRETE BRIDGE DECK

SET RETARDED CONCRETE PLACED IN A BRIDGE DECK AND FINISHED WITH CONVENTIONAL EQUIPMENT EXHIBITED A SEVERE SURFACE DETERIORATION IN THE FORM OF FLAKING SEVERAL DAYS AFTER PAVING. SIMILAR CONCRETE PLACED IN THE APPROACH SLAB ON A GRANULAR SUBGRADE DID NOT FLAKE. LABORATORY AND FIELD INVESTIGATIONS SHOWED THAT THE FLAKING WAS DUE TO THE FORMATION FORMATION OF A WEAK PLANE IMMEDIATELY BELOW THE SURFACE OF THE CONCRETE AND WAS CLOSELY CONNECTED WITH THE BLEEDING CHARACTERISTICS OF THE MIX. THE SOLUTION WAS FOUND IN REDUCING THE BLEEDING RATE OF THE CONCRETE BY A CHANGE IN THE TYPE OF SET RETARDING ADMIXTURE. /RRL/A/

• Supplemental Notes:
  • Vol62, No4, PP421-442, 2FIG, 4TAB, 8PHOT, 6REF
• Authors:
  • RYELL, J
• Publication Date: 1965-4

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings

Subject/Index Terms

• TRT Terms: Admixtures; Bridge decks; Bridges; Concrete; Crash investigation; Deterioration; Failure; Intellectual disabilities; Setting (Concrete); Studies; Surfaces
• Uncontrolled Terms: Setting time
• Old TRIS Terms: Deck; Flaking; Retardation
• Subject Areas: Bridges and other structures; Highways; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00208130
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Dec 12 1994 12:00AM