Characterization of Asphalt Binders Exposed to Extreme Temperatures Through Simple and Effective Test Methods
Temperatures in the lower 48 states are projected to increase about 2.3C (4.1F) by 2050 relative to 2010 according to the NCHRP Report, "Climate Change, Extreme Weather Events and the Highway System: A Practitioner's Guide". As average temperatures increase, so will extremes. Consequently, the extreme climate/temperature-based performance grading (PG) of polymer modified asphalt binders will be affected. The polymer characterization in a modified asphalt binder is currently performed by PG Plus tests (e.g., force ductility test, AASHTO T300). However, force ductility, elastic recovery and some other PG Plus tests are time and material consuming processes. The results are subject to reproducibility difficulties and methods are mostly empirical. Therefore, there is a need for better methods. The main objective of this research is to develop a simple and dynamic shear rheometer based test method that can be used as an alternative to PG Plus tests (elastic recovery and force ductility) to accurately determine high temperature performance of asphalt materials. Toward meeting the objective of this study, asphalt binders from different sources in the southern plains region will be collected for mechanistic evaluation. Further, binders will be recovered from reclaimed asphalt pavement and tested in the laboratory. In particular, multiple stress creep recovery (MSCR) and extensional rheometer tests will be conducted on asphalt binder samples. Research outcomes will include MSCR guidelines for the southern plains states and a new laboratory test method for polymer network characterization in extreme temperature asphaltic materials. The guidelines will provide guidance regarding the use of combined shear and extensional rheology platform to replace the ductilometer based force ductility test (AASHTO T300). This new method is expected to save cost by significantly reducing test time and sample size. Implementable specifications for commonly used extreme temperature asphaltic materials will be developed for immediate implementation or DOT's internal pilot projects.
Language
- English
Project
- Status: Active
- Funding: $460393.00
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Contract Numbers:
DTRT13-G-UTC36
SPTC 14.1-80
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Sponsor Organizations:
Silver Star Construction Company
2401 S. Broadway Street
Moore, Oklahoma United States 73160Oklahoma Department of Transportation
200 NE 21st Street
Oklahoma City, OK United States 73105Haskell-Lemon Construction
3800 S.W. 10th
Oklahoma City, OK United States 73108Arkansas State Highway and Transportation Department
Planning and Research Division
10324 Interstate 30
Little Rock, Arkansas United States 72209Louisiana Transportation Research Center
4101 Gourrier Avenue
Baton Rouge, LA United States 70808Research and Innovative Technology Administration
University Transportation Centers Program
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Performing Organizations:
Louisiana State University, Baton Rouge
Civil & Environmental Engineering Department
3418A Patrick Taylor Hall
Baton Rouge, Louisiana United States 70803University of Oklahoma, Norman
School of Civil Engineering and Environmental Science
202 West Boyd Street, Room 334
Norman, OK United States 73019Arkansas State University, State University
Department of Engineering, P.O. Drawer 1740
State University, AR United States 72467-1740Louisiana Tech University, Ruston
P.O. Box 10348
600 Dan Reneau Drive
Ruston, Louisiana United States 71272-0046 -
Principal Investigators:
Mohammad, Louay
Ghabchi, Rouzbeh
Hossain, Zahid
Wasiuddin, Nazimuddin
- Start Date: 20141001
- Expected Completion Date: 0
- Actual Completion Date: 20160930
- Source Data: RiP Project 38045
Subject/Index Terms
- TRT Terms: Asphalt pavements; Binders; Climate change; Creep; Polymer asphalt; Temperature; Test procedures
- Uncontrolled Terms: Performance grade
- Subject Areas: Highways; Maintenance and Preservation; Pavements; I30: Materials;
Filing Info
- Accession Number: 01543446
- Record Type: Research project
- Source Agency: Southern Plains Transportation Center
- Contract Numbers: DTRT13-G-UTC36, SPTC 14.1-80
- Files: UTC, RIP
- Created Date: Nov 15 2014 1:00AM