Development of Acceptance Criteria of Compacted Hot Mixture Asphalt Bulk Specific Gravity Based on Vacuum Sealed Specimens: Final Report -- Volume I

Details

• Creators:
  Williams, R. Chris ; Williams, Brett ; Kvasnak, Andrea ; Stanton , Brett ; Van Dam, Tom
• Corporate Creators:
  Michigan Technological University
• Corporate Contributors:
  Michigan. Dept. of Transportation
• Subject/TRT Terms:
  Air Voids Asphalt Bulk Specific Gravity Hot Hot Mix Asphalt Mixture Asphalt Paving Materials Specific Gravity VSM
• Publication/ Report Number:
  RC-1522
• Resource Type:
  Tech Report
• Geographical Coverage:
  Michigan ; United States
• TRIS Online Accession Number:
  1115114
• Corporate Publisher:
  Michigan. Dept. of Transportation
• Abstract:
  A number of test methods are available to measure the bulk specific gravity of compacted hot mix asphalt (HMA). The most commonly used test methods (ASTM D 2726 and AASHTO T 166) were designed for use with specimens that do not contain open or interconnected air voids. With increased traffic loading, coarse and open-graded asphalt mixtures have become more common to improve insitu performance. These mixtures are known for open or interconnected air voids. The current methods for addressing coarse and open-graded mixtures (ASTM D 1188 and AASHTO T 275) can lead to erroneous bulk specific gravity measurements and can prevent specimens from further testing. Thus a vacuum sealing method (ASTM D 6752) was developed to address asphalt mixtures that contain interconnected or open air voids. In an evaluation of the new method for determining bulk specific gravity it has been found that a criterion test would help to identify when the new test method would be most suitable. The research objective is to define the point at which the vacuum sealing method (ASTM D 6752) more accurately predicts the bulk specific gravity of an HMA as compared to the conventional method (ASTM D 2726 and AASHTO T 166). For this reason permeability was the fundamental property that was investigated. Permeability is a measure of the asphalt mixtures ability to transmit fluid, which in turn represents the mixtures connectivity of void space. A laboratory method for measurement of permeability of hot mix asphalt (ASTM PS 129-01) has been hypothesized as a criterion test for method selection in determining the bulk specific gravity of hot mix asphalt.
• Format:
  PDF
• Funding:
  96-5434
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:46a7580165c834119ece9eaf2cdbd3d91a8a11e750e9e176e3a76bac8ca0e13f
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/39326/dot_39326_DS1.pdf
• File Type:
  [PDF - 1.85 MB ]