Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements (2006) / Chapter Skim
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For each aggregate test, a descriptive ranking indicating how well it relates to HMA performance is given.Also,an attempt has been made to suggest appropriate tests for given combinations of climatic conditions, materials, and traffic loads. A literature review was completed first and was used to guide the research team in selecting five coarse and six fine aggregates for use in the study.The selected aggregates were tested and used in various combinations to produce five coarse-graded and six fine-graded mixtures that were then tested for rutting characteristics in the accelerated loading facility.The five coarse aggregates covered a wide array of aggregate types and properties; each was combined with a common natural sand to produce the five coarse-graded mixtures.
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Neither of these tests is recommended for routine aggregate specifications. Finally, research is suggested to gather additional information about the relationship between the recommended aggregates tests and HMA fatigue performance.Because the relationship between laboratory and in-service fatigue typically is a scaling factor,adequate information can be obtained from a laboratory experiment.
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