Evaluation of Hybrid Binder Use in Asphalt Mixtures in Louisiana

Currently, the Louisiana Department of Transportation and Development (LaDOTD) primarily relies on Styrene-Butadiene-Styrene (SBS) modified asphalt binders to produce and place asphalt mixtures that resist climate- and load-induced distresses on relatively higher-volume roads and facilities. Yet, recent studies indicated supply shortage of styrene-butadiene polymers for the asphalt industry and recommended that alternate asphalt modifiers be considered during supply shortages, including a very interesting alternative: hybrid binders. This study aims to identify and evaluate whether different hybrid binders can perform competitively versus other modified asphalts currently used in Louisiana’s highway applications. This study will also assess the feasibility of using Hybrid Rubber Modified Asphalt (HRMA) mixtures in Louisiana through laboratory testing and structural analysis to predict the field performance of these mixtures. The implementation of this research will reduce the fatigue and rutting distresses in asphalt pavements, which are common problems in South-Central United States. The results of this research will be used to implement and optimize the use of HRMA mix in asphalt pavements in South-Central United States, and to reduce costs. This research will impact state DOTs, highway contractors, transportation, and the public at large.

• Supplemental Notes:
  • 22BLSU04

Language

• English

Project

• Status: Active
• Funding: $58832
• Contract Numbers:

  69A3551747106

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Managing Organizations:

  Transportation Consortium of South-Central States (Tran-SET)

  Louisiana State University
  Baton Rouge, LA  United States  70803
• Project Managers:

  Dhasmana, Heena

• Performing Organizations:

  Louisiana State University, Baton Rouge

  P.O. Box 94245, Capitol Station
  Baton Rouge, LA  United States  70803
• Principal Investigators:

  Dhasmana, Heena

• Start Date: 20220401
• Expected Completion Date: 0
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt pavements; Bituminous binders; Composite materials; High volume roads; Materials tests; Pavement performance; Rubberized bitumen; Traffic loads
• Geographic Terms: Louisiana
• Subject Areas: Maintenance and Preservation; Materials; Pavements; Planning and Forecasting;

Filing Info

• Accession Number: 01844774
• Record Type: Research project
• Source Agency: Transportation Consortium of South-Central States (Tran-SET)
• Contract Numbers: 69A3551747106
• Files: UTC, RIP
• Created Date: May 6 2022 11:45AM