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Elie Y. Hajj

Associate Professor, Associate Director of the Western Regional Superpave Center
Elie Hajj

Contact Information

Degrees

  • Ph.D., University of Nevada, Reno, 2005
  • M.S., University of Nevada, Reno, 2003
  • B.S., Lebanese University, Lebanon, 1999

Biography

Dr. Elie Y. Hajj is an assistant professor of civil engineering at the University of Nevada, Reno. He earned his Ph.D. (2005) from the University of Nevada specializing in pavements and materials. Dr. Hajj joined the faculty of the University of Nevada in 2006 as a research assistant and in 2011 as an assistant professor.

Since then, he has worked on several research projects for local agencies (RTC of Washoe County, Carson City County, Douglas County), Nevada DOT, FHWA, NCHRP, and private industries. He has authored over 100 publications in journals, national and international conferences and technical reports.

Dr. Hajj is currently leading two FHWA projects: DTFH61-13-C-00014 "Analysis Procedures for Evaluating Superheavy Load Movement on Flexible Pavements," and DTFH61-14-C-00044 "Enhanced Prediction of Vehicle Fuel Economy and Other Vehicle Operating Costs." He is an active member of the Association of Asphalt Paving Technologists (AAPT), the International Society for Asphalt Pavements (ISAP), and three transportation research boards: Committees AFK30, AFK50 and AFD80.

He has also been chairing the AFK 50 committee on " Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements." Dr. Hajj is an associate editor for the International Journal of Pavement Engineering (IJPE).

Research interests

  • Paving materials design and characterization, including sustainable and engineered materials (recycled asphalt pavement, warm mix asphalt) and oxidative aging of asphalt materials
  • Mechanistic pavement design and analysis, including pavement response to heavy dynamic loads, large-scale pavement testing, and cost-effectiveness of maintenance and rehabilitation techniques
  • Computer applications in civil engineering

Past experience

  • Laboratory manager of the Western Regional Superpave Center
  • Pavement engineering services manager and laboratory supervisor at Terracon Consulting Engineering of Reno, Nevada
  • Laboratory evaluation of asphalt mixtures using state-of-the-art equipment
  • Mechanistic analysis of asphalt mixtures under moving and braking heavy trucks
  • Development of web-based materials and research database
  • Improvement of 3D-Move analysis software
  • Development of TEMPS (Temperature Estimate Model for Pavement Structures) software

Other activities within engineering and teaching professions

  • Chair of the TRB AFK50 Committee: Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements)
  • Member of the TRB Committees AFK00 (Section - Asphalt Materials), AFK 30 (Characteristics of Nonasphalt Components of Asphalt Paving Mixtures), AFK50 (Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements), and AFD80 (Strength and Deformation Characteristics of Pavement Sections)
  • Member of the Association of Asphalt Paving Technologists (AAPT)
  • Member of the International Society for Asphalt Pavements (ISAP)
  • Chair of the International Society for Asphalt Pavements (ISAP) Technical Committee Asphalt Pavements & Environment, Work Group (WG) 1 - Hot Recycling of RAP
  • Honorary member of the Nevada Alliance for Quality Transportation Construction
  • Associate Editor for the International Journal of Pavement Engineering (IJPE)

Courses taught

  • CEE 377 (Undergraduate): Construction Materials
  • CEE 427 (Undergraduate): Capstone Design Project - Pavement Section
  • CEE 431/631 (Undergraduate/Graduate): Pavement Design and Analysis
  • CEE 732 (Graduate): Bituminous Materials and Mixtures
  • CEE 733 (Graduate): Advanced Pavement Design
  • CEE 734 (Graduate): Pavement Reconstruction, Rehabilitation, and Maintenance
  • CEE 735 (Graduate): Pavement Management
  • CEE 771 (Graduate): Advanced Topics in Pavement Engineering

Publications

  1. Alavi, M. Z., Hajj, E. Y., and P. E., Sebaaly. "A Comprehensive Model for Predicting Thermal Cracking Events in Asphalt Pavements," International Journal of Pavement Engineering, IJPE Special Issue. In Press.
  2. Sebaaly, P. E., Hajj, E. Y., Sathanathan, T., and S., "Shivakolunthar. A Comprehensive Evaluation of Moisture Damage of Asphalt Concrete Mixtures," International Journal of Pavement Engineering. In Press.
  3. Alavi, M. Z., Morian, N., Hajj, E. Y., and P. E., Sebaaly. "Influence of Asphalt Binder Oxidative Aging on Critical Thermal Cracking Characteristics of Asphalt Mixtures," International Journal of Road Materials and Pavement Design, RMPD. In Press.
  4. Morian, N., Zhu, C., and E. Y., Hajj. "Rheological Indices: Phenomenological Aspects of Asphalt Binder Aging Evaluations," Transportation Research Record: Journal of the Transportation Research Board, Transportation Research Board of the National Academies, Washington, D.C. In Press.
  5. Sanjeevan, S., Piratheepan, M., Hajj, E. Y., and A., Bush. "Cold-in-place Recycling Technique in Nevada: Field Performance Evaluation for a Decade of In-service Period," Transportation Research Record: Journal of the Transportation Research Board, Transportation Research Board of the National Academies, Washington, D.C. In Press.
  6. Sebaaly, P. E., Hajj, E. Y., and M., Piratheepan. "Evaluation of selected warm mix asphalt technologies," International Journal of Road Materials and Pavement Design, RMPD, Vol. 16, No. S1, 2015, pp. 475-486. DOI:10.1080/14680629.2015.1030825.
  7. Chamoun, Z., Souliman, M., Hajj, E. Y., and P. E., Sebaaly. "Evaluation of Select Warm-Mix Additives with Polymer and Rubber Modified Asphalt Mixtures," Canadian Journal of Civil Engineering, 42(6), 2015, pp. 377-388, DOI: 10.1139/cjce-2013-0512.
  8. Souliman, M., Piratheepan, M., Hajj, E. Y., Sebaaly, P. E., and W., Sequeira. "Impact of Lime on the Mechanical and Mechanistic Performance of Hot Mixed Asphalt Mixtures." International Journal of Road Materials and Pavement Design, RMPD, Vol. 16, Issue No. 2, 2015, pp. 421-444, DOI: 10.1080/14680629.2015.1017520.
  9. Alavi, Z., Pouranian, M. R., and E. Y., Hajj. "Prediction of Asphalt Pavement Temperature Profile with Finite Control Volume Method," Transportation Research Record: Journal of the Transportation Research Board, No. 2456, Transportation Research Board of the National Academies, Washington, D.C., 2014, pp. 96-106, DOI: 10.3141/2456-10, ISSN: 0361-1981.
  10. Morian, N., Alavi, Z. M., Hajj, E. Y., and P. E., Sebaaly. "Evolution of Thermo-viscoelastic Properties of Asphalt Mixtures with Oxidative Aging," Accepted for publication in the Transportation Research Record: Journal of the Transportation Research Board, No. 2447, Vol. 4, Transportation Research Board of the National Academies, Washington, D.C., 2014, pp. 1-12, DOI: 10.3141/2447-01, ISSN: 0361-1981.
  11. Souliman, M., Suwal, R., and E. Y., Hajj. "General Guidelines to Highway Agencies to Enhance their Local Pavement Rating Systems: A Case Study of Nevada's Pavement Rating System," International Journal of Pavement Research and Technology, IJPRT, Vol. 7, No. 5, 2014, pp. 305-316, ISSN 1997-1400.
  12. Souliman, M., Hajj, E. Y., and P. E., Sebaaly. "Impact of Antistrip Additives on the Long-Term Aging Rheological Properties of Asphalt Binders." Journal of Materials in Civil Engineering, ASCE, July 16, 2014, DOI: 10.1061/(ASCE)MT.1943-5533.0001111.
  13. Mensching, D. J., Daniel, J. S., Bennert, T., Medeiros Jr., M.S., Elwardany, M. D., Mogawer, W., Hajj, E. Y., and M. Z. Alavi. "Low Temperature Properties of Plant-Produced RAP Mixtures in the Northeast." International Journal of Road Materials and Pavement Design, RMPD, Vol. 15, Supplement 1, Special Issue: Papers from the 89th AAPT, 2014, pp. 1-27. DOI: 10.1080/14680629.2014.926617.
  14. Hajj, E. Y., Souliman, M. I., and E., Cortez. "Influence of Warm-Mix Additive on Mechanistic, Economical, and Environmental Attributes of a Polymer-Modified Asphalt Mixture." Advances in Civil Engineering Materials, ASTM, Vol. 3, No. 1, 2014, DOI: 10.1520/ACEM20130099.
  15. Ulloa, A., Hajj, E. Y., and P. E., Sebaaly. "Mechanistic-Based Approach to Evaluate Rutting Susceptibility of Hot-Mix Asphalt Mixtures Using Dynamic Triaxial Testing." Transportation Research Record: Journal of the Transportation Research Board, No. 2373, Vol. 4, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 121-133, DOI: 10.3141/2373-13, ISSN: 0361-1981.
  16. Alavi, M. Z., Hajj, E. Y., and N., Morian. "Approach for Quantifying Effect of Binder Oxidative Aging on Viscoelastic Properties of Asphalt Mixtures." Transportation Research Record: Journal of the Transportation Research Board, No. 2373, Vol. 4, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 109-120, DOI: 10.3141/2373-12, ISSN: 0361-1981.
  17. Hajj, E. Y., Souliman, M. I., Alavi, M. Z., and L., Loria. "Influence of BituTech RAP Bioasphalt on Viscoelastic Properties of Reclaimed Asphalt Mixtures." Transportation Research Record: Journal of the Transportation Research Board, No. 2371, Vol. 2, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 13-22, DOI: 10.3141/2371-02, ISSN: 0361-1981.
  18. Morian, N., Hajj, E. Y., and P. E., Sebaaly. "Significance of Mixture Parameters on Binder Aging in Hot-Mix Asphalt Mixtures." Transportation Research Record: Journal of the Transportation Research Board, No. 2370, Transportation Research Board of the National Academies, Washington, D.C., 2013, pp. 116-127, DOI: 10.3141/2370-15, ISSN: 0361-1981.
  19. Hajj, E. Y., Souliman, M. I., Sebaaly, P. E., and M., Barton. "Influence of Laboratory Mixing Procedures on Volumetric and Mechanical Properties of RAP Mixtures." Advances in Civil Engineering Materials, ASTM, Vol. 2, No. 1, September 13, 2013, DOI: 10.1520/ACEM20120049.
  20. Ulloa, A., Hajj, E. Y., Siddharthan, R. V., and P. E., Sebaaly. "Equivalent Loading Frequencies for Dynamic Analysis of Asphalt Pavements." Journal of Materials in Civil Engineering, ASCE, Vol. 25, No. 9, September 1, 2013, pp. 1162-1170, DOI: 10.1061/(ASCE)MT.1943-5533.0000662.
  21. Ahmad, T. A., Hajj, E. Y., Sebaaly, P. E., and N., Majerus. "Influence of Aggregate Source and Warm-Mix Technologies on the Mechanical Properties of Asphalt Mixtures." Advances in Civil Engineering Materials, ASTM, Vol. 2, No. 1, August 15, 2013, pp. , DOI: 10.1520/ACEM20130072.
  22. Hajj, E. Y., Alavi, M. Z., Morian, N. E., and P. E., Sebaaly. "Effect of Select warm-mix Additives on Thermo-Viscoelastic Properties of Asphalt Mixtures," International Journal of Road Materials and Pavement Design, RMPD, Vol. 14, No. S1, 2013, pp. 175-186. DOI:10.1080/14680629.2013.774754.
  23. Farrar, M. J., Hajj, E. Y., Planche, J-P, and M. Z., Alavi. "A Method to Estimate the Thermal Stress Build-up in an Asphalt Mixture from a Single Cooling Event," International Journal of Road Materials and Pavement Design, RMPD, Vol. 14, No. S1, 2013, pp. 201-211. DOI:10.1080/14680629.2013.774756.
  24. Hajj, E. Y., Loria, L. G., Sebaaly, P. E., Cortez, E., and S. Gibson. "Effective Timing for Two Sequential Applications of Slurry Seal on Asphalt Pavement."  Journal of Transportation Engineering, ASCE, Vol. 139, No. 5, May 2013, pp. 476-484, DOI: 10.1061/(ASCE)TE.1943-5436.0000521.
  25. Hajj, E. Y., Sebaaly, P. E., Sathanathan, T., and S. Shivakolunthar. "Impact of Antistrip Additives on Pavement Performance Using Mechanistic-Empirical Pavement Design Guide." Journal of Materials in Civil Engineering, ASCE, Vol. 25, No. 3, March 1, 2013, pp. 308-317, DOI: 10.1061/(ASCE)MT.1943-5533.0000582.
  26. Hajj, E. Y., Thushanthan, P., Sebaaly, P. E., and R. V., Siddharthan. "Influence of Tire-pavement Stress Distribution, Shape and Braking on Asphalt Pavement Performance Predictions." Transportation Research Record: Journal of the Transportation Research Board, No. 2306, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 73-85, DOI: 10.3141/2306-09, ISSN: 0361-1981.
  27. Alavi, M. Z., Hajj, E. Y., Hanz, A., and H., Bahia. "Evaluating Adhesion Properties and Moisture Damage Susceptibility of Warm Mix Asphalts: Bitumen Bond Strength (BBS) and Dynamic Modulus Ratio (ESR) Tests." Transportation Research Record: Journal of the Transportation Research Board, No. 2295, Vol. 3, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 44-53, ISSN: 0361-1981.
  28. Porras, J., Hajj, E. Y., Sebaaly, P. E., Kass, S., and T., Liske. "Performance Evaluation of Field-Produced Warm-Mix Asphalt Mixtures in Manitoba, Canada." Transportation Research Record: Journal of the Transportation Research Board, No. 2294, Vol. 2, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 64-73, ISSN: 0361-1981.
  29. Hajj, E. Y., Loria, L., and P. E., Sebaaly. "Methodologies for Estimating Effective Performance Grade of Asphalt Binders in Mixtures with High Recycled Asphalt Pavement Content: Case Study." Transportation Research Record: Journal of the Transportation Research Board, No. 2294, Vol. 2, Transportation Research Board of the National Academies, Washington, D.C., 2012, pp. 53-63, ISSN: 0361-1981. (Nominated for the K. B. Woods Award).
  30. Sebaaly, P. E., Hajj, E.  Y., Sathanathan, T., and S. Shivakolunthar. "Impact of Lime and Liquid Additives on Life-Cycle Cost of Asphalt Pavements," Lime: Building on the 100-Year Legacy of ASTM Committee C07 on June 28, 2012 in San Diego, CA; STP 1557, M. Thomson and J. Brisch, Guest Editors, pp. 1-21, DOI:10.1520/STP104321, ASTM International, West Conshohocken, PA 2012.
  31. Hajj, E. Y., Sebaaly, P. E., West, R., Morian, N., and L., Loria . "Recommendations for the Characterization of RAP Aggregate Properties Using Traditional Testing and Mixture Volumetrics," International Journal of Road Materials and Pavement Design, RMPD, Vol. 13, Supplement 1: AAPT, 2012, pp. 209-233. DOI:10.1080/14680629.2012.657072.
  32. Kasozi, A., Hajj, E. Y., Sebaaly, P. E., and J. C., Elkins. "Evaluation of Foamed Warm-Mix Asphalt Incorporating Recycled Asphalt Pavement for Volumetric and Mechanical Properties." International Journal of Pavement Research and Technology, IJPRT, Vol. 5, No. 2, 2012, pp. 75-83, ISSN 1997-1400.
  33. Sebaaly, P.E., and E. Y., Hajj. "Comparative Life Cycle Cost Analyses of Asphalt Pavements Treated with Anti-stripping Additives," 2011 Conference and Exhibition of the Transportation Association of Canada - Transportation Successes: Let's Build on Them, Transportation Association of Canada, 2011, 19p.
  34. Hajj, E. Y., Loria, L., Sebaaly, P. E., Borroel, C. M., and P. Leiva. "Optimum Time for Application of Slurry Seal to Asphalt Concrete Pavements," Transportation Research Record: Journal of the Transportation Research Board, No. 2235, Transportation Research Board of the National Academies, Washington, D.C., 2011, pp. 66-81, ISSN: 0361-1981.
  35. Hajj, E. Y., Sebaaly, P. E., Hitti. E., and C. Borroel. "Performance Evaluation of Terminal Blend Tire Rubber Asphalt Mixtures - Case Studies," Journal of the Association of Asphalt Paving Technologists, AAPT, Vol. 80, 2011, pp. 665-696, ISSN: 0270-2932.
  36. Hajj, E. Y., Ullao, A., Sebaaly, P. E., and G. Bazi. "Impact of Rich-Bottom Design in Asphalt Pavements," International Journal of Pavement Research and Technology, IJPRT, Vol. 4, No. 6, 2011, pp. 313-323, ISSN 1997-1400.
  37. Morian, N., Hajj, E. Y., Glover, C. J., and P. E. Sebaaly. "Oxidative Aging of Asphalt Binders in Hot-Mix Asphalt Mixtures," Transportation Research Record: Journal of the Transportation Research Board, No. 2207, Vol. 1, Transportation Research Board of the National Academies, Washington, D.C., 2011, pp. 107-116, ISSN: 0361-1981.
  38. Loria, L., Hajj, E. Y., Sebaaly, P. E., Barton, M., Kass, S., and T. Liske. "Performance Evaluation of Asphalt Mixtures with High Recycled Asphalt Pavement Content," Transportation Research Record: Journal of the Transportation Research Board, No. 2208, Vol. 2, Transportation Research Board of the National Academies, Washington, D.C., 2011, pp. 72-81, ISSN: 0361-1981.
  39. Hajj, E. Y., Tannoury, G., and P. E. Sebaaly. "Evaluation of Rut Resistant Asphalt Mixtures for Intersection," International Journal of Road Materials and Pavements Design, RMPD, Vol. 12, Issue 2, 2011, pp. 263-292, doi: 10.1080/14680629.2011.9695246.
  40. Hajj, E. Y., Morian, N., El Tannoury, G., Manoharan, S., and P. E. Sebaaly. "Impact of Lime Application Method on Raveling and Moisture Sensitivity in HMA Mixtures," International Journal of Pavement Engineering, IJPE, Vol. 12, Issue 2, 2011, pp. 149-160, ISSN 1029-8436.
  41. Kvasnak, A., West, R., Michael, J., Loria. L., Hajj, E. Y., and N. Tram. "Bulk Specific Gravity of Reclaimed Asphalt Pavement Aggregate: Evaluation the Effect on Voids in Mineral Aggregate," Transportation Research Record: Journal of the Transportation Research Board, No. 2180, Vol. 2, TRB, Washington, D.C., 2010, pp. 30-35, ISSN: 0361-1981.
  42. Hajj, E. Y., Ullao, A., Siddharthan, R., and P. E. Sebaaly. "Estimation of Stress Conditions for the Flow Number Simple Performance Test," Transportation Research Record: Journal of the Transportation Research Board, No. 2181, Vol. 3, Transportation Research Board of the National Academies, Washington, D.C., 2010, pp. 67-78, ISSN: 0361-1981.
  43. Hajj, E. Y., Ullao, A., Siddharthan, R., and P. E. Sebaaly. "Characteristics of the Loading Pulse for the Flow Number Performance Test," Journal of the Association of Asphalt Paving Technologists, AAPT, Vol. 79, 2010, pp. 253-294, ISSN: 0270-2932.
  44. Ma, T., Bahia, H., Mahmoud, E., and E. Y., Hajj. "Estimating Allowable RAP in Asphalt Mixes to Meet Target Low Temperature PG Requirements," Journal of the Association of Asphalt Paving Technologists, AAPT, Vol. 79, 2010, pp. 473-496, ISSN: 0270-2932.
  45. Hajj, E. Y., Loria, L., and P. E. Sebaaly. "Performance Evaluation of Asphalt Pavement Preservation Activities," Transportation Research Record: Journal of the Transportation Research Board, No. 2150, Transportation Research Board of the National Academies, Washington, D.C., 2010, pp. 36-46, ISSN: 0361-1981.
  46. Hajj, E. Y., Sebaaly, P. E., and P. Kandiah. "Evaluation of the Use of Reclaimed Asphalt Pavement in Airfields HMA Pavements," Journal of Transportation Engineering, ASCE, Vol. 136, No. 3, March, 2010, pp. 181-189, DOI: 10.1061/(ASCE)TE.1943-5436.0000090.
  47. Hajj, E. Y., Sebaaly, P. E., and R. Shresta. "Laboratory Evaluation of Mixes Containing Recycled Asphalt Pavement (RAP)," International Journal of Road Materials and Pavements Design, RMPD, Vol. 10, Issue 3, 2009, pp. 495-518, ISSN: 1468-0629.
  48. Sebaaly, H. K., Hajj, E. Y., Sebaaly, P. E., Weitzel, D., and E. Hitti. "Laboratory Evaluation of HMA Mixes Using Tire Modified Binders," International Journal of Pavements, Vol. 7, #1-2-3, 2008, pp. 64-75, ISSN: 1676-2797.
  49. Loria, L., Sebaaly, P. E., and E. Y. Hajj. "Long-Term Performance of Reflective Cracking Mitigation Techniques in Nevada." Transportation Research Record: Journal of the Transportation Research Board, No. 2044, Transportation Research Board of the National Academies, Washington, D.C., 2008, pp. 86-95, ISSN: 0361-1981.
  50. Hajj, E. Y., Siddharthan, R. V., Sebaaly, P. E., and D. Weitzel. "Laboratory-based Unified Permanent Deformation Model for Hot-Mix Asphalt Mixtures." Journal of Testing and Evaluation, ASTM, Vol. 35, No. 3, May 2007, pp. 272-280, ISSN: 1945-7553.
  51. Hajj, E. Y., Siddharthan R. V., Sebaaly, P. E., and D. Weitzel. "Hot Mix Asphalt Mixtures for Nevada's Intersections." Transportation Research Record: Journal of the Transportation Research Board, No. 2001, Transportation Research Board of the National Academies, Washington, D.C., 2007, pp. 73-83, ISSN: 0361-1981.
  52. Sebaaly, P. E., Little, D., Hajj, E. Y., and E. Berger. "Impact of Lime and Liquid Antistrip on the Properties of an Idaho Mixture." Transportation Research Record: Journal of the Transportation Research Board, No. 1998, Transportation Research Board of the National Academies, Washington, D.C., 2007, pp. 65-74, ISSN: 0361-1981.
  53. Hajj, E. Y., Sebaaly, P. E., and R. V. Siddharthan. "Response of Asphalt Pavement Mixture Under a Slow Moving Truck." Asphalt Concrete: Simulation, Modeling, and Experimental Characterization, Geotechnical Special Publication No. 146, ASCE, 2006, DOI: 10.1061/40825(185)14.
  54. Bazi, G. M., Hajj, E. Y., and A. M. Itani. "Analysis of R/C decks in multi-cell box girder bridges under rational wheel load distributions." Bridge Structures: Assessment, Design and Construction, Vol. 1, No. 2, June 2005, pp. 69-80, ISSN: 1573-2487.
  55. Hajj, E. Y., Sebaaly, P. E., and D. Weitzel. "Fatigue Characteristics of Superpave and Hveem Mixtures." Journal of Transportation Engineering, ASCE, Vol. 131, March/April, 2005, pp. 302-310, DOI: 10.1061/(ASCE)0733-947X(2005)131:4(302)
  56. Tohme, P., Sebaaly, P. E., Hajj, E. Y., and D. Johnston. "Effectiveness of Antistrip Additives for Bituminous Mixtures." International Journal of Pavements, Vol. 3, #1-2, 2004, pp. 50-62, ISSN: 1676-2797.

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