UTC 2022 Funding - Cycle 2 Research Projects

Project No.: CY3-LSU-UARK-06
Title: Advanced Characterization and Performance-Based Test Methods for Emulsified Asphalt in South-Central United States
Performing Institution: Louisiana State University and University of Arkansas
Principal Investigator: Mostafa Elseifi, Louisiana State University; Andrew F. Braham, University of Arkansas
Start and Anticipated Completion Dates: 01/01/2026 to 01/15/2027
Abstract: Asphalt emulsions are increasingly used in pavement maintenance and rehabilitation due to their low cost, reduced environmental impact, and ease of application. However, the growing use of more complex emulsion formulations—incorporating additives such as polymers, ground tire rubber, compatibilizers, asphalt extenders, polyphosphoric acid, rejuvenators, anti-stripping agents, and recycling agents—has made it difficult to characterize these materials and predict their field performance using conventional tests like viscosity and penetration. This project aims to introduce a new generation of laboratory characterization methods capable of predicting the performance of asphalt emulsions in the field. A diverse set of emulsions will be tested using advanced test methods, including Fourier Transform Infrared Spectroscopy, SARA (saturates, asphaltenes, resins, and aromatics) fractionation, High-Pressure Gel Permeation Chromatography, and the Sessile Drop method. Results will be analyzed in conjunction with laboratory performance testing and field data from the Long-Term Pavement Performance program and other performance sources within Region 6. The outcome of this study will be a set of recommended laboratory test methods that demonstrate strong correlation with both laboratory and field performance, thereby improving emulsion selection and quality control practices.
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