Rapid field method for determining the polish susceptibility of carbonate aggregates.
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Rapid field method for determining the polish susceptibility of carbonate aggregates.

Filetype[PDF-3.78 MB]


  • English
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    Details:

    • Creators:
      Patty, Tom S.
    • Corporate Creators:
      Texas. Highway Department
    • Subject/TRT Terms:
    • Publication/ Report Number:
      3-20-71-022(4)
    • Resource Type:
      Tech Report
    • Geographical Coverage:
    • Corporate Publisher:
      Texas. Highway Department
    • Abstract:
      A quick and simple method by which limestones and related carbonate

      paving aggregates can be rated as to their relative susceptibility to

      polishing has been successfully applied to a wide number of aggregate

      sources used on Texas Highway projects. The technique involves taking

      a small representative sample of the aggregate and subjecting it to a

      dilute hydrochloric acid treatment for about 20 seconds, The etched

      particles are washed, examined under a 10-15X handlens or a stereoscopic

      microscope, and the resulting surface texture is then compared

      to a set of photos or diagrams for rating. The rating system, developed

      fro~ the examination of over a hundred carbonate sources, can assist in

      judging a material's potential susceptibility and resistance to polishing.

      Data from laboratory and field-trial studies when compared to

      duplicate samples tested by the Accelerated Polishing Test (Test Method

      Tex 438-A), shows that a Textural Rating of 1 correlates to a range of

      measured polish values of 25 to 33, a rating of 2 correlates to polish

      values in the range of 34 to 37 and a rating of 3 correlates to polish

      values ·greater than 37.

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