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Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements (2006) / Chapter Skim
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Research Approach
Pages 3-7

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From page 3...
... Relating results of the aggregate tests shown in Table 1 to the HMA distresses of rutting, moisture susceptibility, and fatigue served as the basis for the validation experiments. The research was conducted according to the plan, shown in Figure 1, which involved aggregate testing, identification of HMA mixture designs, and HMA mixture testing using accelerated pavement tests.
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From page 4...
... . Step 3: Accelerated Pavement Tests Step 1: Selection and Collection of Materials Step 2: Aggregate Tests and HMA Mixture Designs Step 3a: Rutting Tests Step 3b: Moisture Susceptibility Tests Step 3c: Fatigue Tests Step 4: Aggregate Test Evaluations Step 5: Analysis and Report Preparation Coarse Aggregate Tests: Uncompacted Void Content, Flat or Elongated Particles, Micro-Deval, LA Abrasion, Percent Fractured, Soundness, Deleterious Material Fine Aggregate Tests: Fine Aggregate Angularity, Methylene Blue, D60, D10, Sand Equivalent, Micro-Deval, Soundness HMA Mixture Designs: Ndesign = 100, Nmax = 160 Coarse Aggregates: Dolomite, Limestone, Gravel, Granite, Traprock Fine Aggregates: Two Natural Sands, Crushed Gravel Sand, Granite, Traprock Rutting performance evaluated by INDOT/Purdue APT, dry condition, 50˚C test temperature Moisture susceptibility performance evaluated by INDOT/Purdue APT, wet condition, 46˚C test temperature Fatigue performance evaluated by INDOT/Purdue APT, dry condition, 10˚C HMA plant stockpile aggregates evaluated for gradation, flat or elongated, uncompacted void content of fine aggregate, methylene blue value, D60, D10 Aggregate from plant mixtures and test section cores evaluated for gradation, flat or elongated, uncompacted void content of fine aggregate Statistical analysis, data interpretation, conclusions and recommendations Figure 1.
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From page 5...
... Moisture Susceptibility Experiment Five fine-graded HMA mixtures were used to investigate relationships between moisture susceptibility and fine aggregate properties as shown in Table 4.Performance as affected by moisture damage was assessed by the amount of rutting observed in the HMA mixtures. The AASHTO T 283 test was also performed on cores extracted from the APT test lanes before accelerated pavement testing.
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From page 6...
... This type of analysis was used to determine the aggregate characteristic's sensitivity to traffic level and also provide a method of developing traffic-related input for regression analysis targeted at determining the performance of HMA pavements at different traffic levels with the individual or multiple aggregate properties as input factors. 6 AggregateAggregate Performance Test Category Mix Coarse Fine CA-1 Dolomite (IN)
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From page 7...
... Effect of FAA on rut depth. 0 1000 2000 3000 4000 5000 6000 35 40 45 50 FAA Lo ad R ep et iti on s to 1 0m m R ut D ep th Figure 3.
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Key Terms

  • aggregate tests
  • coarse aggregate
  • void content
  • aggregate test
  • hma mixture

  • moisture susceptibility
  • uncompacted void
  • hma performance
  • hma mixtures
  • methylene blue

  • natural sand
  • coarse fine
  • blue test
  • rutting experiment
  • uncrushed gravel

  • crushed gravel
  • experiment design
  • methods evaluation
  • gravel sand
  • hma aggregate

  • aggregate testing
  • aggregate angularity
  • aggregate properties
  • hma distresses
  • fine aggregates

  • test category
  • test sections
  • test lanes
  • test method
  • pavement performance


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