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Asphalt Sustainability Issues: Evaluation of Long-Term Performance of Recycled Additives, Including Recycled Motor Oil, Reclaimed Asphalt Pavements, Reclaimed Asphalt Shingles, and Bioasphalts

Project Information

Project ID: 
Project Status: 
Start Date: 
Tuesday, September 15, 2009
End Date: 
Monday, December 31, 2012
FHWA Program: 
FHWA Subprogram: 
Long-Term Infrastructure Performance
FHWA Activity: 
Long-Term Pavement Performance
FHWA Topics: 
Research/Technologies--Turner-Fairbank Highway Research Center (TFHRC)
TRT Terms: 
Infrastructure; Research; Materials; Asphalt; Asphalt Additives; Reclaimed Asphalt; Pavements; Solubility
FHWA Discipline: 
Pavement and Materials
TRB Subject Area: 
Maintenance and Preservation, Materials, Research

Contact Information

First Name: 
Last Name: 
(202) 493-3232
Email Address: 
Infrastructure Materials Team
Office of Infrastructure Research and Development
Office Code: 

Project Details

Project Description: 

The computer program for calculating solubility parameters is based on (a) elemental composition and aromaticity and (b) group (chemical functional groups) contributions. Solubility parameters for blended material are needed to generate phase behavior diagrams.


The key project objectives are:

(1) Develop a computer program for calculating solubility parameters of asphalts, asphalt components, and additives.

(2) Use solubility parameters to predict phase behavior tendency of asphalt and asphalt-additive blends.

Project Findings: 

The Solubility Calculator provides a good estimate of solubility parameters for binders and polymers; however, the values for most asphalt binders are nearly the same. The application will be much more useful when applied to asphalt components, such as maltenes (and their subfractions) and asphaltenes.


Deliverable Name: 
Solubility parameter calculator
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
Tools for assessing the tendency of asphalt and asphalt additive blends to phase separate.
Deliverable Name: 
Miscibility guide
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
Guidelines for blending asphalts and asphalt additives.