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: Effect of voids in grouted, post-tensioned concrete bridge construction
    sub title: seminar slides
  name:
    name part: Trejo, David.
  name:
    name part: Texas
    name part: Department of Transportation.
  name:
    name part: Texas Transportation Institute
  name:
    name part: United States
    name part: Federal Highway Administration.
  type of resource: text
  origin info:
    place:
      place term: txu
    date issued: 2009
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 41 pages : digital, PDF file (3.19 MB) with color illustrations
  abstract: Post-tensioned (PT) bridges have several advantages over other bridge types: they can span longer distances, can be constructed relatively fast, and are economical. The tendons of PT bridges are critical components, essentially the backbone of the PT bridge system. Tendons consist of strands, ducts, and grout that fill the interstitial space between the strands and ducts. Grout is intended to protect the strands from corrosion, especially when the duct is damaged or water or other deleterious substances infi ltrate the tendon. However, past construction practices and materials have resulted in voids in tendons. Corrosion of the strands in these tendons has resulted in bridge failures in Europe. More recently, voids have been detected in PT bridges in the United States with some of the strands in these voids exhibiting corrosion. In fact, tendon failures have been reported on PT bridges, especially in Florida, that are exposed to aggressive environments. This history has raised concerns about conditions in PT bridges in Texas. A recent inspection of tendons in PT bridges in Texas identified voids. However, all environments in Texas may not be classified as aggressive. Research was needed to assess how the environmental and other conditions, especially the conditions inside the voids in tendons, affect the corrosion of strands and how this corrosion influences the structural reliability of PT bridges. In addition, economical and high-performance grout materials and effi cient inspection and repair methods needed to be defined.
  note: Title from PDF title screen (November 2, 2009).
  note: Electronic resource.
  note: Mode of access: World Wide Web.
  note: PowerPoint training materials
  note: Seminar slides; Feb. 26, 2009.
  note: Project performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration 0-4588
  subject:
    geographic code: n-us-tx
  subject:
    topic: Traffic signs and signals
    geographic: Texas
    genre: Handbooks, manuals, etc
  subject:
    topic: Highway communications
    genre: Handbooks, manuals, etc
  subject:
    topic: Intelligent transportation systems
    genre: Handbooks, manuals, etc
  subject:
    topic: Traffic control devices
  subject:
    topic: variable message signs
  subject:
    topic: Driver information systems
  subject:
    topic: intelligent transportation systems
  related item:
    title info:
      title: Seminar (Texas Transportation Institute) ; 0-4588-P2
  identifier: 31320 NTL
  identifier: http://tti.tamu.edu/documents/0-4588-P2.pdf
  identifier: http://ntl.bts.gov/lib/31000/31300/31320/0-4588-P2.pdf
  record info:
    record content source: TRL
    record creation date: 091102
    record change date: 20151113121718.0
    record identifier: in00002529409