Dr. Erol Tutumluer is a Professor specializing in Transportation Geotechnics in the Department of Civil and Environmental Engineering (CEE) at the University of Illinois at Urbana-Champaign (UIUC). He has been active in transportation geotechnics and pavement engineering research, education, and practice for more than 20 years with research interests and expertise in characterization of pavement and railroad track geomaterials, i.e., subgrade soils and base/ballast unbound aggregates and mechanistic-empirical pavement design. Dr. Tutumluer has served as an investigator on over 60 research projects with grants received from Federal agencies including FHWA, FAA, FRA, US Army Corps of Engineers, NCHRP, NEXTRANS University Transportation Center, and NSF; state agencies including numerous single grants from Illinois, Indiana, North Carolina and Minnesota DOTs and pool-funded research contributions from 5 other state DOTs; and private/industry. These projects have dealt with structural considerations of unbound aggregate pavement layers and development of aggregate models for the resilient and permanent deformation behavior from laboratory and full-scale pavement testing, which demonstrated the importance of nonlinear and anisotropic aggregate behavior and how it is linked to various qualities of unbound materials (including particle shape, texture and angularity and type and amount of fines), field compaction and construction practices, and pavement designs. He served as a co-PI on NCHRP 4-30 and 4-34 projects focused on aggregate size and shape characterization and he was the consultant working on the 2013 NCHRP Synthesis 445: Practices for Unbound Aggregate Pavement Layers which consolidated information on the state-of-the-art and state-of-the-practice of designing and constructing unbound aggregate pavement layers to potentially improve pavement performance and longevity. Dr. Tutumluer has authored and co-authored over 200 peer reviewed publications from his research projects.
Dr. Tutumluer’s recent projects have directly focused on pavement geotechnics, mechanistic empirical pavement design  and sustainability issues, such as the Illinois Center for Transportation (ICT) projects sponsored by IDOT on investigating effects of aggregate type and quality including recycled asphalt product (RAP) used as aggregate in pavement base layers and on characterization of Illinois aggregates for subgrade replacement and subbase. The current ICT R27-124 project is focused on evaluating large top-sized subgrade aggregate applications through full-scale performance testing for both unsurfaced and surfaced pavements. The most recent ICT R27-125 project investigates sustainable aggregates production and green applications for aggregate by-products such as quarry fines. In addition, two recent Minnesota DOT projects have focused on best value unbound aggregate materials selection and use for improved asphalt and concrete pavement performances in Minnesota. Dr. Tutumluer is currently leading a research effort titled “Base Course Aggregate Testing and Rutting Model Calibration” to develop improved rutting models for unbound aggregate materials commonly used in the state of North Carolina for pavement base and subbase applications. Preliminary results from this research study have helped establish the research plan framework in this proposal.
Dr. Tutumluer is the Editor-in-Chief of the new Transportation Geotechnics Elsevier journal and he is the Chair of the ISSMGE Technical Committee 202 on Transportation Geotechnics. Dr. Tutumluer served as the Chair of the ASCE Geo-Institute’s Pavements Committee in 2006-2012. As an active affiliate of Transportation Research Board (TRB), Dr. Tutumluer is currently the Chair of the AFP70 Mineral Aggregates TRB Committee. Dr. Tutumluer was the 2000 recipient of the TRB’s Fred Burgraff award for Excellence in Transportation Research; he also received TRB’s Geology and Earth Materials Section Best Paper Awards in 2009 and 2012.