Research

Research Interests

  • Fatigue and fracture behavior of asphalt materials
  • Asphalt binder rheology and chemistry
  • Mechanical behavior of viscoelastic materials
  • Computational modeling of flexible pavements and materials
  • Sustainable solutions to pavement construction problems
  • Design and construction practices for flexible pavements

Peer-Reviewed Journal Articles

  1. Hajj, Ramez and Scott Young. “An analysis of theoretical and empirical relationships between two asphalt binder cracking parameters.” Road Materials and Pavement Design. (2021). https://doi.org/10.1080/14680629.2021.1906734
  2. Ahmed, Rayhan Bin, Kamal Hossain, and Ramez Hajj. “Chemical, Morphological, and Fundamental Properties of Rejuvenated Asphalt Binders.” Journal of Materials in Civil Engineering. 33(2) (2021). https://doi.org/10.1061/(ASCE)MT.1943-5533.0003564
  3. Sreeram, Anand, Zhen Leng, Ramez Hajj, Wellington L.G. Ferreira, Zhifei Tan, and Amit Bhasin. “Fundamental investigation of the interaction mechanism between new and aged binders in binder blends.” International Journal of Pavement Engineering (2020). https://doi.org/10.1080/10298436.2020.1799208
  4. Filonzi, Angelo, Sang Ki Lee, Wellington Ferreira, Ramez Hajj, and Amit Bhasin. “A micro-extraction method for use with 4 mm plate geometry in the Dynamic Shear Rheometer to evaluate asphalt binder rheology.” Construction and Building Materials (2020). https://doi.org/10.1016/j.conbuildmat.2020.119024
  5. Filonzi, Angelo, Ramez Hajj, Andre de Fortier Smit, and Amit Bhasin. “Validation of inverse stereology generation of two-dimensional area gradations for computational modeling of asphalt mixtures.” Road Materials and Pavement Design (2020). https://doi.org/10.1080/14680629.2020.1742194
  6. Sakib, Nazmus, Ramez Hajj, Rachel Hure, Ayah Alomari, and Amit Bhasin. ”Examining the relationship between bitumen polar fractions, rheological performance benchmarks, and tensile strength.” Journal of Materials in Civil Engineering (2020). https://doi.org/10.1061/(ASCE)MT.1943-5533.0003197
  7. Hajj, Ramez, Adam Ramm, Amit Bhasin, and Michael Downer. “Real-time microscopic and rheometric observations of strain-driven cavitation instability underlying micro-crack formation in asphalt binders.” International Journal of Pavement Engineering. (2020). https://doi.org/10.1080/10298436.2019.1652742
  8. Hajj, Ramez, Angelo Filonzi, Syeda Rahman, and Amit Bhasin. “Considerations for using the 4 mm plate geometry in the Dynamic Shear Rheometer for low temperature evaluation of asphalt binders.” Transportation Research Record: Journal of the Transportation Research Board. 2673 (11) (2019). https://doi.org/10.1177/0361198119855332
  9. Sreeram, Anand, Zhen Leng, Ramez Hajj, and Amit Bhasin. ”Compatibility between aged and unaged binders in bituminous mixtures.” Fuel. 254 (2019). https://doi.org/10.1016/j.fuel.2019.05.161
  10. Hajj, Ramez, Angelo Filonzi, Andre Smit, and Amit Bhasin. “Design and performance of mixes for use as an ultra thin overlay.” Journal of Transportation Engineering Part B: Pavements. 145(3) (2019). https://doi.org/10.1061/JPEODX.0000130
  11. Sabaraya, Indu Venu, Angelo Filonzi, Ramez Hajj, Dipesh Das, Navid Saleh, and Amit Bhasin. “Investigating the ability of nanomaterials to effectively disperse in asphalt binders for use as a modifier.” Journal of Materials in Civil Engineering. 30(8) (2018). https://doi.org/10.1061/(ASCE)MT.1943-5533.0002315
  12. Hajj, Ramez and Amit Bhasin. “The search for a measure of fatigue cracking in asphalt binders- a review of different approaches.” International Journal of Pavement Engineering. 19(3) (2018): 205-219. https://doi.org/10.1080/10298436.2017.1279490
  13. Hajj, Ramez, Rachel Hure, and Amit Bhasin. “Evaluation of stiffness, strength, and ductility of asphalt binders at an intermediate temperature.” Transportation Research Record: Journal of the Transportation Research Board 2632 (2017): 44-51. https://doi.org/10.3141/2632-05

Technical Reports

  1. Hajj, Ramez and Yujia Lu. Current and Future Best Practices for Pothole Repair in Illinois. No. FHWA-ICT-21-003. February 2021. https://doi.org/10.36501/0197-9191/21-003
  2. Filonzi, Angelo, Sang Ki Lee, Ramez Hajj, Darren Hazlett, and Amit Bhasin. Implementing Revisions to the Allowable Maximum Recycled Binder Ratio (RBR) Specification. No. FHWA/TX-20/0-6947-1. September 2020.
  3. Hajj, Ramez, Angelo Filonzi, and Amit Bhasin. “Improving the Performance Graded asphalt binder specification.” Technical Report No. FHWA/TX-18/0-6925-1. May 2019.
  4. Filonzi, Angelo, Indu Venu Sabaraya, Ramez Hajj, Dipesh Das, Navid B. Saleh, Amit Bhasin, and Enad Mahmoud. “Evaluating the use of nanomaterials to enhance properties of asphalt binders and mixtures.” No. FHWA/TX-17/0-6854-1. September 2018.
  5. Hajj, Ramez, Angelo Filonzi, Aliasghar Dormohammadi, Cheng Zhu, Vivek Tandon, and Amit Bhasin. “Design and construction of ultra thin overlays as an alternative to seal coats.” Technical Report No. FHWA/TX-18/0-6857-1. March 2018.

Conference Proceedings

  1. Hajj, Ramez, Kiran Mohanraj, Amit Bhasin, Adam Ramm, and Michael Downer. “Micro-scale observations of fatigue damage mechanism in asphalt binder.” In Advances in Materials and Pavement Performance Prediction II: Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction (AM3P 2020), 27-29 May, 2020, San Antonio, TX, USA, p. 449. 2020.
  2. Hajj, Ramez, and Amit Bhasin. “Importance of triaxial stress state on asphalt binder tensile failure.” In Advances in Materials and Pavement Performance Prediction II: Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction (AM3P 2020), 27-29 May, 2020, San Antonio, TX, USA, p. 445. 2020.
  3. Hajj, Ramez, Adam Ramm, Nazmus Sakib, Amit Bhasin, and Michael Downer. “Relation of modified bitumen microstructure to cracking indicators.” Proceedings of AM3P 2018: Advances in Materials, Pavement Performance, and Prediction. Accepted for publication and presentation. Doha, Qatar, 2018.
  4. Komaragiri, Satyavati, Angelo Filonzi, Ramez Hajj, Arash Motamed, and Amit Bhasin. “Three-dimensional profiler for performance evaluation of chip seals.” Proceedings of AM3P 2018: Advances in Materials, Pavement Performance, and Prediction. Accepted for publication and presentation. Doha, Qatar, 2018.
  5. Sakib, Nazmus, Adam Ramm, Ramez Hajj, Amit Bhasin, and Michael Downer. “Bulk microstructures in bitumen and its influence on rheology.” Proceedings of AM3P 2018: Advances in Materials, Pavement Performance, and Prediction. Accepted for publication and presentation. Doha, Qatar, 2018.
  6. Tehrani, Mehran, Ayoub Y. Boroujeni, Ramez Hajj, and Marwan Al-Haik. “Mechanical characterization of a hybrid carbon nanotube/carbon fiber reinforced composite.” Proceedings of the ASME 2013 International Mechanical Engineering Congress and Exposition: 1-5. San Diego, CA, 2013.
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