rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Thermal segregation influence on current asphalt mixtures
  title info:
    title: Determine the influence of thermal segregation on current asphalt mixtures
  name:
    name part: Sebesta, Stephen
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Kim, Jinho
    name part: (Expert on pavements)
    role:
      role term: author.
  name:
    name part: Taylor, Ross
    name part: (Transportation researcher)
    role:
      role term: author.
  name:
    name part: Hu, Sheng
    name part: 1975-
    role:
      role term: author.
  name:
    name part: Texas
    name part: Department of Transportation.
    name part: Research and Technology Implementation Office,
    role:
      role term: sponsoring body.
  name:
    name part: United States
    name part: Federal Highway Administration,
    role:
      role term: sponsoring body.
  name:
    name part: Texas A & M Transportation Institute
    role:
      role term: publisher.
  type of resource: text
  genre: bibliography
  genre: Technical reports.
  origin info:
    place:
      place term: txu
    date issued: 2024
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource (xiv, 144 pages) : color illustrations, color map
  abstract: Thermal segregation during the construction of asphalt mixtures can result in the formation of low-density areas and a subsequent decrease in pavement life. Although the methods for measuring thermal segregation have remained largely unchanged, significant advancements have been made in asphalt mixture types and design methods over the past decade. This study assessed the significance of thermal segregation with current asphalt mixes, validated existing criteria, and established modified criteria as necessary. The study also resulted in guidance on identifying and addressing recurring thermal segregation issues, ensuring that thermal profile requirements align with modern asphalt mixes and construction practices. Results from this study showed that based on current practices, more than two thermal profiles with severe thermal segregation could be considered recurring. This study also showed that thermal segregation does induce higher air voids in current mixes, which results in poorer rutting and reduced crack life properties. Analysis suggested that the influence of thermal segregation-induced air voids could take as much as 10 years off the pavement life, although the actual influence of thermal segregation on field performance can vary significantly depending on many factors. In practice, thermal segregation-induced air voids may impact performance but may allow the pavement to still reach its design life. Results from this study showed that the current 25°F temperature differential is still valid as a threshold to define thermal segregation. Results from this study also revealed that the current methods for evaluating thermal profile need further development to include affected area and absolute placement temperature.
  note: by Stephen Sebesta, TTI Research Scientist, Texas A&M Transportation Institute, Jinho Kim, Associate Transportation Researcher, Texas A&M Transportation Institute, Ross Taylor, Research Specialist, Texas A&M Transportation Institute and Sheng Hu, TTI Research Engineer, Texas A&M Transportation Institute.
  note: Some versions: Open access versions available from some providers Unrestricted online access star
  note: Technical Report; September 2020–August 2023.
  note: Sponsored by the Texas Department of Transportation and the Federal Highway Administration 0-7075.
  note: Includes bibliographical references (pages 137-139).
  subject:
    geographic code: n-us-tx
  subject:
    topic: Pavements, Asphalt
    topic: Thermal properties
    geographic: Texas
  subject:
    topic: Pavements, Asphalt
    topic: Additives
    geographic: Texas
  subject:
    topic: Pavements, Asphalt
    geographic: Texas
    topic: Density
  subject:
    topic: Asphalt mixtures
  subject:
    topic: Temperature
  subject:
    topic: Hot mix asphalt
  subject:
    topic: Air voids
  related item:
    title info:
      title: Research report (Austin, Tex.) ; no. 0-7075-R1
  identifier: https://tti.tamu.edu/documents/0-7075-R1.pdf
  identifier: https://rosap.ntl.bts.gov/view/dot/72331
  related item:
    location:
      url: https://rosap.ntl.bts.gov/view/dot/72331
  access condition: Some versions: Open access versions available from some providers
  record info:
    record content source: TXA
    record creation date: 240315
    record change date: 20240315212737.3
    record identifier: in00004783211
    language of cataloging:
      language term: eng