DEICER SCALING MECHANISMS IN CONCRETE

THE OBJECTIVE WAS TO INVESTIGATE THE MECHANISMS BY WHICH DEICERS CAUSE DETERIORATION OF CONCRETE. DETERIORATION ASSOCIATED WITH SATURATED CALCIUM CHLORIDE SOLUTIONS WAS FOUND TO BE DEPENDANT UPON RELATIVE HUMIDITY AND TEMPERATURE. IT HAS PROBABLY LED TO THE OBSERVATION THAT CALCIUM CHLORIDE IS GENERALLY MORE AGGRESSIVE AS A DEICER THAN SODIUM CHLORIDE. THE MECHANISM OF DEICER DETERIORATION OF CONCRETE SHOWN TO BE COMMON FOR MANY DEICERS WAS FOUND TO EXIST ONLY WITH WEAK CONCENTRATIONS AND ONLY UNDER FREEZE-THAW CONDITIONS. THE EFFECT OF LOW CONCENTRATIONS OF CALCIUM CHLORIDE ON CONCRETE WAS GREATER THAN THAT OF WATER OR OF MORE CONCENTRATED SOLUTIONS. THE CHLORIDE DISTRIBUTION PATTERN WITH DEPTH OF SPECIMEN WAS GREATLY AFFECTED BY THESE LOW CONCENTRATION SOLUTIONS, AND WAS FOUND TO DIFFER FROM THE NORMAL DIFFUSION PATTERN EXPECTED. THIS EVIDENCE STRONGLY SUPPORTS THE HYPOTHESIS OF A HYDRAULIC PRESSURE MECHANISM OF CONCRETE SCALING, INFLUENCED ONLY BY THE ABSORPTION CHARACTERISTICS OF CONCRETE, WHICH IS IN TURN INFLUENCED BY DEICER SOLUTIONS OF LOW CONCENTRATION. /AUTHOR/

  • Corporate Authors:

    Pennsylvania State University, University Park

    Pennsylvania Transportation Institute, Transportation Research Building
    University Park, PA  USA  16802

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Pennsylvania Department of Transportation

    1215 Transportation and Safety Building
    Harrisburg, PA  USA  17120
  • Authors:
    • Browne, F P
    • Larson, T D
    • Cady, P D
    • Bolling, N B
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00212106
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Study No 69-20
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 12 1972 12:00AM