People
Raul E. Marrero Rosa, Ph.D.
Associate
Focus
- Materials Science + Engineering
Biography
Raul Marrero Rosa, Ph.D., is an Associate II within the Materials Consulting group at CTLGroup specializing in advanced cementitious materials and nanomodification techniques. Dr. Marrero’s expertise focuses on the characterization and performance of ultra-high-performance concrete, fiber-reinforced composites, and additive manufacturing applications for structural materials.
Prior to joining CTLGroup, Dr. Marrero was a postdoctoral fellow at Northwestern University for three and a half years, where he advanced the development of Ultra-High-Performance Fiber Reinforced Concrete (UHPFRC) for 3D printed laminates. His doctoral research at Northwestern University focused on the interaction between carbon nanofiber reinforcement and cementitious composites using advanced characterization techniques including Atomic Force Microscopy, nanoindentation, and SEM/EDS. Dr. Marrero has also conducted research on sulfur-concrete, carbon fiber reinforced concrete, and cementitious volume changes at multiple scales.
Education
Postdoctoral Fellowship in Civil Engineering, Northwestern University, 2025
Ph.D. in Civil Engineering, Northwestern University, 2022
M.S. in Civil Engineering, Northwestern University, 2018
B.S. in Civil Engineering, Universidad de Puerto Rico – Mayagüez, 2016
B.S. in Land Surveying and Topography Universidad de Puerto Rico – Mayagüez, 2016
Affiliations
The American Ceramics Society (ACerS)
American Concrete Institute (ACI)
American Society of Civil Engineers (ASCE Member)
Featured Publications
Irizarry, E. M., Gomaa, S., Marrero, R. E., Ahmed, A., Burroughs, J. F., Kreiger, E., & Cusatis, G. (2025). “Influence of surface geometry on the mechanical properties of the 3d printed ultra-high-performance concrete”, Available at SSRN 5369360. (Under Review – Preprint Available)
Rosa, R. E. M., Bhibho, T., Dönmez, A. A., Cusatis, G., & Bažant, Z. P. (2024). “The shard test and nanoporomechanics reverse classical paradigm of cement hydration being contractive”, Proceedings of the National Academy of Sciences, 121(51), e2418448121.
Gomaa, S., Irizarry, E. M., Ahmed, A., Rosa, R. M., Ahmed, H., Burroughs, J., Kreiger, E., Liu, J., Troemner, M., & Cusatis, G. (2024). “3D printing of ultra-high-performance concrete: Shape stability for various printing systems”, Construction and Building Materials, 456, 139039.
Rosa, R. E. M., Corr, D. J., Espinosa, H. D., & Shah, S. P. (2023). “Characterization of adhesion strength between carbon nanotubes and cementitious materials”, Cement and Concrete Composites, 138, 104953.
Troemner, M., Ramyar, E., Marrero, R., Mendu, K., & Cusatis, G. (2021). “Marscrete: A Martian concrete for additive construction applications utilizing in situ resources”, In Earth and Space 2021, (pp. 801-807).
Conference Papers
Marrero-Rosa, R., Irizarry, E., Ahmed, A., Yu, K., Brooks, A., Cusatis, G., & Alnaggar, M. (2026). “Fluid to solid transition characterization of the 3d printed uhpc for offshore wind foundations”, 4th International Interactive Symposium on Ultra-High Performance Concrete (UHPC) 2026. (Accepted conference paper)
Marrero, R. E., Soto, H. L., Benitez, F. R., Medina, C., & Suarez, O. M. (2017). “Study of high-performance concrete reinforced with bamboo fibers”, TechConnect Briefs. Vol. 2, Materials for Energy Efficiency and Sustainability: TechConnect Briefs 2017, 301-304.
