New Generation HMA Mix-Design Procedures and Specifications for Texas

The Texas Department of Transportation (TxDOT) has introduced the Hamburg wheel tracking test into routine hot-mix asphalt (HMA) mix designs in order to minimize the risk of designing mixes with either rutting or stripping problems. This shift has prompted designers to move to stiffer asphalt-binder grades (e.g., PG 70-22S and PG 76-2). In addition, the increasing use of recycled materials has raised concerns that the typical mixes are now drier, more difficult to compact, and more susceptible to premature cracking. This project developed alternative mix-design approaches that will optimize HMA field performance, particularly with respect to cracking.

• Summary URL:
  https://library.ctr.utexas.edu/dbtw-wpd/exec/dbtwpub.dll?AC=QUERY&TN=catalog&RL=1&RF=.Detail&BU=http%3A%2F%2Flibrary.ctr.utexas.edu%2Fdbtw-wpd%2Ftextbase%2Fbrowsenew.htm&QY=find+ID+%3D+30777&utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+NewestTxdotResearch+%28New+TxDOT+Research+Publications+%28Feed%29%29
• Summary URL:
  https://library.ctr.utexas.edu/hostedPDFs/txdot/psr/6132.pdf
• Corporate Authors:

  Texas A&M University, College Station

  Texas Transportation Institute
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Scullion, Tom
  • Walubita, Lubinda F
  • Das, Gautam
  • Tanvir, Hossain
• Publication Date: 2012-8-31

Language

• English

Media Info

• Media Type: Web
• Features: Photos;
• Pagination: 2p

Subject/Index Terms

• TRT Terms: Asphalt pavements; Cracking; Dense graded aggregates; Hot mix asphalt; Mix design; Pavement performance; Recycled materials
• Identifier Terms: Hamburg Wheel Tracking Device
• Geographic Terms: Texas
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01470549
• Record Type: Publication
• Report/Paper Numbers: 0-6132
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Jan 24 2013 9:08AM