Development of Preliminary Balanced Mix Design Method for Stone Matrix Asphalt
Since the volumetric-based Superpave mix design methods were implemented in the early 2000s, many roads have been reported to suffer from surface cracking due to insufficient binder or rutting because of excessive binder oil. To improve the mix durability and performance, the balanced mix design (BMD) methods for hot mix asphalt (HMA) have been adopted by state highway agencies. However, most of the research studies related to BMD focused on the dense-graded HMAs, and unconventional and innovative paving materials, such as the stone matrix asphalt (SMA) were not sufficiently investigated during the development of the BMD methods. SMA is a gap-graded HMA that is designed to maximize deformation resistance and durability by using a structural basis of stone-on-stone contacts. Due to the structural and ingredient difference in SMA and conventional HMA, the design concepts for the two types of mixtures are different, and additional tests are needed in the SMA mix design. Therefore, it is necessary to incorporate the design concept in the balanced mix design methods. In this proposed study, the investigators aim to develop a preliminary BMD method for SMA mixes through systematic laboratory testing. The performance of SMA with different designs will be evaluated and compared with the counterpart conventional HMA. The performance testing methods and their performance threshold limits that are suitable for SMA mix design will also be identified in this research.
- Record URL:
Language
- English
Project
- Status: Active
- Funding: $89970
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Contract Numbers:
69A3551947137
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Sponsor Organizations:
Transportation Infrastructure Durability & Life Extension
Washington State University
Civil & Environmental Engineering
Pullman, Washington United States 99164Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590Missouri Department of Transportation
1617 Missouri Boulevard
P.O. Box 270
Jefferson City, MO United States 65102 -
Managing Organizations:
Transportation Infrastructure Durability & Life Extension
Washington State University
Civil & Environmental Engineering
Pullman, Washington United States 99164 -
Project Managers:
Kline, Robin
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Performing Organizations:
Missouri University of Science & Technology, Rolla
Department of Engineering
202 University Center
Rolla, MO 65409 -
Principal Investigators:
Liu, Jenny
- Start Date: 20230324
- Expected Completion Date: 20240401
- Actual Completion Date: 0
- USDOT Program: University Transportation Centers
- Subprogram: Transportation Infrastructure Durability and Life Extension
Subject/Index Terms
- TRT Terms: Mix design; Pavement performance; Performance tests; Stone matrix asphalt
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01890847
- Record Type: Research project
- Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
- Contract Numbers: 69A3551947137
- Files: UTC, RIP
- Created Date: Aug 23 2023 8:54PM