Following his internationally recognized contributions on asphalt binder technologies for Superpave, Dr. Bahia emerged as a pioneer and leading expert in studying and evaluation of modified asphalts. Recognizing the limits of traditional asphalts, Dr. Bahia focuses on several aspects of asphalts modified with polymer additives: performance testing and improvement, design-to-application requirements, and marreduction of energy consumption through low-temperature compaction and extended pavement life.

In his current role as Professor of Civil and Environmental Engineering at UW-Madison, he has taught several graduate courses and was instrumental in the development of the university's asphalt research program. To learn more about Dr. Bahia's background and professional affiliations, as well as the courses he teaches at UW-Madison, please see his profile page at the CEE Department's Web site.

Selected Research

Velasquez, R., Tabatabaee, H. A. and Bahia. H.U., Low Temperature Cracking Characterization of Asphalt Binders by Means of the Single-Edge Notch Bending (SENB) Test, Journal of the Association of Asphalt Paving Technologists, Vol. 80, 2011, pp. 583-614.

Hanz, A., Mahmoud, E. and H. Bahia. Impacts of WMA Production Temperatures on Binder Aging and Mixture Flow Number.Journal of the Association of Asphalt Paving Technologists, Vol. 80, 2011, pp. 459-490.

Hintz, C., Velasquez, R., Li, Z., and H. Bahia. Effect of Oxidative Aging on Binder Fatigue Performance, Journal of the Association of Asphalt Paving Technologists, Vol. 80, 2011, pp. 527-548.

Moraes, R., Velasquez, R., and Bahia, H.U. Measuring Effect of Moisture on Asphalt-Aggregate Bond with the Bitumen Bond Strength Test, In Transportation Research Record: Journal of the Transportation Research Board, Washington, D.C., Vol. 2209, 2011, pp. 70-81.

Hintz, C., Velasquez, R., Johnson, C., and Bahia, H., Modification and Validation of the Linear Amplitude Sweep Test for Binder Fatigue Specification, In Transportation Research Record: Journal of the Transportation Research Board, Washington, D.C., Vol. 2207, 2011, pp. 99-106.

Johannes, P., Mahmoud, E., and Bahia, H., The Sensitivity of the ASTM D7000 “Sweep Test” to Emulsion Application Rate and Aggregate Gradation, In Transportation Research Record: Journal of the Transportation Research Board, Washington, D.C., Vol. 2235, 2011, pp. 95-102.

Swiertz, D., Mahmoud, E., Bahia, H. Estimating the Effect of RAP and RAS on Fresh Binder Low Temperature Properties without Extraction and Recovery. In Transportation Research Record: Journal of the Transportation Research Board, Vol. 2208, Washington, D.C., 2011, pp. 48-55.

Delgadillo, R., Bahia, H., and Lakes, R., A Nonlinear Constitutive Relationship for Asphalt Binders, Materials and Structures, Vol. 45, 2011, pp. 457-473.

Mutamad, A., and Bahia, H., Influence of Test Geometry, Temperature, Stress Level, and Loading Duration on Binder Properties Measured Using DSR, Journal of Materials in Civil Engineering, ASCE, Vol.23, No. 10, 2011, pp. 1422-1432.

Bahia, H., Meruva, A., Velasquez, R., Modification of the Penetration Test to Measure Rheological Properties of Bitumen, Asfaltos y Pavimentos, 2011.

Bahia, H., Tabatabaee, N., Clopotel, C., and Golalipour, A., Evaluation of Using the MSCR Test for Modified Binder Specification, In Canadian Technical Asphalt Association (CTAA) Proceedings, Vol. LVI, Quebec City, Quebec, 2011, pp. 203-222.

Swiertz, D., Bahia, H. Test Method to Quantify the Effect of RAP and RAS on Blended Binder Properties without Binder Extraction, In Canadian Technical Asphalt Association (CTAA) Proceedings, Vol. LVI, Quebec City, Quebec, 2011, pp. 43-60.

Faheem, A. F., Bahia, H. U., Yang, S.-H, and Al-Qadi, I. Evaluation of Rigden Fractional Voids Test Method and the Relation to Mastic Viscosity, Journal of the Association of Asphalt Paving Technologists, Vol. 79, 2010, pp. 1–34. Abstract

Ma, T., Bahia, H. U., Mahmoud, E., Hajj, E. Y.. Estimating Allowable RAP in Asphalt Mixes to Meet Target Low Temperature PG Requirements, Journal of the Association of Asphalt Paving Technologists, Vol. 79, 2010, pp. 473–496. Abstract

Hanz, A., Z. Arega, and H. Bahia. Rheological Behavior of Emulsion Residues Produced by Evaporative Recovery Method. In Transportation Research Record: Journal of the Transportation Research Board, No. 2179, Transportation Research Board of the National Academies, Washington, D.C., 2010, pp. 102–108. Abstract

Hanz, A., A. Faheem, E. Mahmoud, and H. U. Bahia. Measuring the Effects of Warm Mix Additives Using a Newly Developed Asphalt Binder Lubricity Test for the DSR. In Transportation Research Record: Journal of the Transportation Research Board, No. 2180, Transportation Research Board of the National Academies, Washington, D.C., 2010, pp. 85–92. Abstract

Miller, T., Z. Arega, and H. Bahia. Correlating Rheological Properties of Emulsion Residue to Early Chip Seal Performance. In Transportation Research Record: Journal of the Transportation Research Board, No. 2179, Transportation Research Board of the National Academies, Washington, D.C., 2010, pp. 66–74. Abstract

Greyling, G., T. Miller, K. Jenkins and H. Bahia. Development of a Standard Test Method for Determining Emulsion Bond Strength Using the Bitumen Bond Strength (BBS) Test – A South African Perspective. Proceedings of the 2nd International Sprayed Sealing Conference, Melbourne, Australia, 2010. Abstract

Cho, D.-W., and H. U. Bahia. New Parameter to Evaluate Moisture Damage of Asphalt-Aggregate Bond in Using Dynamic Shear Rheometer. Journal of Materials in Civil Engineering, Vol. 22, No. 3, 2010, pp. 267–276. Abstract

Miller, T. D., and H. U. Bahia. Establishing a Framework for Analyzing Asphalt Pavement Sustainability. International Journal of Pavement Research and Technology, Vol. 3, No. 3, 2010, pp. 149–155. Abstract

Johnson, C. M., H. U. Bahia, and H. Wen, “Practical Application of Viscoelastic Continuum Damage Theory to Asphalt Binder Fatigue Characterization.” Accepted for publication by the Association of Asphalt Paving Technologists, 2009.

Schmitt, R. L., C. M. Johnson, H. U. Bahia, and A. J. Hanz, “Effects of Temperature and Compaction Effort on Field and Lab Densification of HMA.” Accepted for publication by the Association of Asphalt Paving Technologists, 2009.

Delgadillo, R., and H. U. Bahia, “Effects of temperature and pressure on hot mixed asphalt compaction: Field and laboratory study.” Journal of Materials in Civil Engineering, v20, no. 6, p. 440-448, 2008.

Faheem, A. F., H. Wen, L. Stephenson, and H. U. Bahia, “Effect of Mineral Filler on Damage Resistance Characteristics of Asphalt Binders.” J. Assn. Asphalt Paving Technologists, v78, 2008.

Ojo, J. O., D. O. Fratta, H. U. Bahia, C. Daranga, and M. Marasteanu, “Thermo-Volumetric Properties of Asphalt Binders and Mixtures.” Proc. of the 6th RILEM International Conference on Cracking in Pavements, 2008.

Bahia, H. U., and C. Daranga, “Advancements in the Characterization of Polymer Modified Asphalts.” 5th Mexican Asphalt Congress, 2007.

Bahia, H. U., and A. F. Faheem, “Using the Superpave Gyratory Compactor to Estimate Rutting Resistance of Hot-Mix Asphalt.” Transportation Research E-Circular, no. E-C124, p. 45-61, 2007.

Bahia, H., A. Hanz, K. Kanitpong, and H. Wen. “Test Method to Determine Aggregate/Asphalt Adhesion Properties and Potential Moisture Damage.” Report WHRP 07-02. Wisconsin Highway Research Program, 2007.

Cho , D.-W., and H. U. Bahia, “Effects of Aggregates' Surface and Water on Rheology of Asphalt Films.” Proceedings from the 86th Annual Meeting of the Transportation Research Board, 2007.

Christensen, D. W., R. McQueen, and H. U. Bahia, “Selection of High-Temperature Binder PG Grades for Airfield Pavements.” FAA Worldwide Airport Technology Transfer Conference, 2007.

Delgadillo, R., A. Motamed, and H. Bahia. “Field Validation of Wisconsin Modified Binder Selection Guidelines.” Report 0092-03-13. Wisconsin Highway Research Program, 2007.

Faheem, A. F., and H. U. Bahia, “Compaction and Tenderness of HMA Mixtures: A Laboratory Study.” Proceedings from the 86th Annual Meeting of the Transportation Research Board, 2007.

Johnson, C. M., H. U. Bahia, and H. Wen. Evaluation of Strain-Controlled Asphalt Binder Fatigue Testing in the Dynamic Shear Rheomete (PDF, 188kB). Proc., 4th International SIIV Congress, 2007.

Kanitpong, K., S. Sonthong, K. Nam, W. Martono, and H. U. Bahia, “Laboratory Study on Warm-Mix Asphalt Additives.” Proceedings from the 86th Annual Meeting of the Transportation Research Board, 2007.

Martono ,W., H. U. Bahia, and J. D'Angelo, “Effect of testing geometry on measuring fatigue of asphalt binders and mastics.” Journal of Materials in Civil Engineering, v19, no. 9, p. 746-752, 2007.

Mahmoud, A. F. F., and H. Bahia. “Using the Gyratory Compactor to Measure Mechanical Stability of Asphalt Mixtures.” Report WHRP 05-02. Wisconsin Highway Research Program, 2004.

Bahia, H. U., D. I. Hanson, M. Zeng, H. Zhai, M. A. Khatri, and R. M. Anderson. NCHRP Report 459: Characterization of Modified Asphalt Binders in Superpave Mix Design (PDF, 1.6 MB). TRB, National Research Council, Washington, D.C., 2001.