Compatibility of aggregate, asphalt cement and antistrip materials : final report.
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Compatibility of aggregate, asphalt cement and antistrip materials : final report.

Filetype[PDF-198.66 KB]


  • English
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    • Creators:
      Paul, Harold R.
    • Corporate Creators:
      Louisiana Transportation Research Center
    • Corporate Contributors:
      United States. Federal Highway Administration
    • Subject/TRT Terms:
    • Publication/ Report Number:
      LTRC REPORT NO. 292
    • Resource Type:
      Tech Report
    • Geographical Coverage:
      Louisiana
    • Corporate Publisher:
      Louisiana Transportation Research Center
    • Abstract:
      Studies undertaken for the FHWA revealed a significant moisture damage problem in Louisiana hot mix pavements. At that time an antistrip additive from a qualified products list was required at the set rate of 0.5 percent weight of asphalt cement. The additives were qualified with the subjective ten minute boil test. No provision was made to test the actual aggregate used on state projects. This study was initiated to further understand the stripping phenomenon using Louisiana specific materials and to develop an objective test procedure for field testing.

      The Louisiana ten minute boil test, indirect tension test (Lottman) and the freeze-thaw pedestal test (Texas) were identified for investigation. A test factorial which included thirteen aggregates, five asphalt cements and eleven additive treatments was developed. The additives included four high efficiency liquid antistrips, four low efficiency liquid antistrips, one “super” antistrip, hydrated lime in both slurry and dry forms, and with no additive. The aggregates were chosen as representative of the predominant sources used at the time. In addition, 22 field projects which used these sources were cored to determine field experience with stripping.

      The results indicated that all three testsidentified field moisture susceptibility problems. A specific implementation plan was provided which provides for the use of the boil test to establish minimum antistrip additive dosage rates and the use of the ITT for job mix approval. Subsequently, all three tests have been successfully used to identify field moisture problems.

    • Format:
      PDF
    • Funding:
      LTRC RESEARCH PROJECT NO. 85-1B
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