Board of Directors

The ISAP Board of Directors governs the Society and is composed of elected Directors, Directors appointed by Patron members, Directors appointed by Association Members, and the immediate Past-Chair. The Board also consists of ex-officio members represented by the Chairs of the ISAP Technical Committees (TC). The Board appoints the Executive Committee with powers as it shall see fit, subject to regulation of the By-Laws. The Executive Committee members include four elected officials of the Board – Chair, Vice-Chair, Secretary, and Treasurer – plus the immediate Past-Chair and Executive Administrator.


Executive Committee Members


Luis Loría Salazar
LANAMME University of Costa Rica
Costa Rica

Luis Guillermo Loría-Salazar earned his degree in Civil Engineering at the University of Costa Rica in 1998. In 2007 he obtained his master’s degree at the University of Nevada, in Reno, United States of America. He continued his work at the same university, and in 2011 he earned his PhD. In 2014 he was conferred the rank of professor at the University of Costa Rica. Dr. Loria-Salazar has been acknowledged as a consultant in the field of design and analysis of materials, teaching courses in several countries in the region.

Much of his professional career has been devoted to teaching at the University of Nevada in Reno and at the Civil Engineering Department of the University of Costa Rica, both at the undergraduate and graduate levels.

In addition to his teaching duties, he conducts research at the National Laboratory of Testing Materials and Structural Models (LanammeUCR) on Pavement Design, Science of Materials, Technical Specifications and Quality Control Methods for road projects. From this research about 152 publications have been derived, many of which have been presented at various renown international conferences and journals.

He was recently appointed as member of the Committee AFK20 (Characteristics of Asphalt Materials) and the Scientific Committee AFD40 (Full-Scale Accelerated Pavement Testing), both from the Transportation Research Board (TRB) of the National Academy of Sciences (NAS) of the United States.


Vice Chair

Alan Carter
École de technologie supérieure



Past Chair

Gaylon Baumgardner
Paragon Technical Services

Gaylon L. Baumgardner is Senior Vice President, Ergon Asphalt and Emulsions, Inc., a subsidiary of Ergon, Inc. of Jackson, MS, with thirty (30) plus years of experience in the petroleum and petroleum-related products industry.  Baumgardner holds a BS in Chemistry from Henderson State University and a Ph.D. in Civil Engineering from Mississippi State University.

Prior to employment by Ergon, Inc. in 1988, Baumgardner served as Manager of Technical Development for Siplast, Inc., a producer of commercial modified bitumen roofing systems, formerly a division of Elf Aquitaine, currently owned by the ICOPAL group.  Under his direction, Paragon Technical Services, Inc., (PTSi), a division of Ergon Asphalt and Emulsions, Inc., is responsible for research and development services for Ergon Asphalt and Emulsions, Inc. and Ergon Armor, Inc. with primary focus in paving and related products, which include asphalt, polymer modified asphalt, asphalt emulsions, and polymer modified asphalt emulsions as well as specialty coatings.  He also oversees full-service third party testing and development capabilities offered by PTSi to the petroleum refining, roofing, waterproofing, protective coatings, specialty asphalts and asphalt paving industries.

Baumgardner is an active member of the Association of Asphalt Paving Technologists (AAPT), the Association of Modified Asphalt Producers (AMAP) (past president), the Canadian Technical Asphalt Association (CTAA) and the International Society for Asphalt Pavements (ISAP).  He presently serves on various task groups for ASTM International Committees D04 and D08. Gaylon has served as Chairman for the International Technical Committee of the Asphalt Emulsion Manufacturers Association (AEMA) and the organizing committee for the International Symposium of Asphalt Emulsion Technology (ISAET), and Chairman of the Asphalt Institute Technical Advisory Committee (TAC). He currently serves as Chairman of the Asphalt Institute Roofing Technical Advisory Committee (RTAC), and as Co-Chairman of Binder Expert Task Group. Gaylon serves on the board of directors of the  International Bitumen Emulsion Federation (IBEF), as a friend of the National Center for Asphalt Technology (NCAT) Applications Steering Committee, as a member of the Pacific Coast Conference on Asphalt Specifications (PCCAS), as a member and board member of the Southeastern Asphalt User/Producer Group (SEAUPG), and as an active member of the American Chemical Society (ACS) as well as other technical committees in the asphalt and petroleum products industries.

Jean-Pascal Planche
Western Research Institute

Jean-Pascal is the current Vice President of Transportation Technology for Western Research Institute in Laramie, Wyoming.  Before this, he was employed at Total Bitumen as a Technical Expert in charge of defining the technical strategy with the Research, Marketing and Refining directions in Paris France.  He has also the Chairman of the the French bitumen standardization group BNPé/P04/GE1, representing France standardization body at the European CEN/TC336/WG1 on bituminous binders.  Prior to that, he worked for Elf Asphalt in both Solaize France and Terre Haute, Indiana.  He received his ENSCMu at the Engineer School in Chemistry and his PhD in Macromolecular Chemistry Science at the University of Lyon, France.  He is author or coauthor of more than 70 papers and articles in various international scientific events such as AAPT, AMAP, TRB, PIARC, RILEM, ISAP, ACS, Petersen Asphalt Research Conference & P3 symposium, E&E congress, IRC…, and in journals such as Thermo Chimica Acta, Journal of Rheology, Materials and Structures, Fuel, Energy and Fuel, Nature. He is also the inventor or co-inventors of more than 20 international delivered patents, mainly in the Polymer Modified Asphalt field.  He is a Member of ISAP, RILEM, TRB and AAPT. In 2011 he was inducted into the AMAP Hall of Fame – Association of Modified Asphalt Producers (USA) for life time achievement in the field of the development of polymer modified asphalts.


Gerald (Gerry) Huber
Heritage Research Group

Gerry Huber is originally from Saskatchewan. Mr Huber obtained a Bachelor degree in Civil Engineering and worked at Saskatchewan Highways and Transportation for 10 years in construction supervision, project design and finally as bituminous engineer. He obtained a Master’s degree from the University of Texas specializing in asphalt mixture properties then joined the Asphalt Institute for five years where he helped advance mix design technology including changes to MS-2, the manual of “Mix Design Methods for Asphalt Concrete” and was involved in the Strategic Highway Research Program working on the technical coordination team responsible for developing Superpave.

Since 1992 he works for the Heritage Research Group, a private asphalt research office based in Indianapolis, Indiana. He has been actively involved in implementation activities of Superpave and other new asphalt technologies including Stone Matrix Asphalt, Porous Asphalt and hot mix asphalt warranties.




Executive Administrator


R. Michael (Mike) Anderson
International Society for Asphalt Pavements

R. Michael (Mike) Anderson was chosen to succeed Gene Skok as the Executive Administrator of ISAP in January 2014. Mike started his career in 1987 with the Kentucky Department of Highways as asphalt mix design engineer, following that assignment by working for HG Mays Corporation – an asphalt mix production/construction company. Since 1991 he has worked for the Asphalt Institute –  currently serving as the Director of Research and Laboratory Services.

In addition to ISAP, Mike is involved in several professional organizations with an interest in asphalt technology. He is a member of the Association of Asphalt Paving Technologists (AAPT) – serving as the Association’s President in 2009 and as Executive Director since July 2013. He is a member of the Association of Modified Asphalt Producers (AMAP), Asphalt Emulsion Manufacturers Association (AEMA), Canadian Technical Asphalt Association (CTAA), and ASTM International. Mike participates in several Transportation Research Board (TRB) Standing Committee as a “Friend”, and serves as co-Chair of the Asphalt Binder Expert Task Group (ETG) and liaison to the Asphalt Mixture ETG.

He is registered as a professional engineer in Kentucky.

Executive Administrator – Emeritus

Eugene Skok
Eugene Skok received a Bachelors, Masters and PhD in Civil Engineering at the University of Minnesota in 1957, 1959 and 1969, respectively. He has worked and taught in the areas of Pavement Design, Evaluation and Engineering Materials and as a researcher. He worked at the AASHO Road Test during the construction and analysis periods in 1958-1960. He then worked for the Asphalt Institute in College Park, Maryland.

From 1963 through 1971, while at the University of Minnesota he worked on various research projects including the research used for the current Minnesota Highway Department pavement design procedure. He also did research for U.S. Forest Service, NCHRP and the Minnesota Local Road Research Board in pavement design, analysis and quality control.

In 1972 he started teaching at St. Paul Technical College where he was Head of the Civil Technology Department. He also helped start a pavement consulting firm (Midwest Pavement Management) in 1980 which was bought out by Braun Intertec in 1987.
In 1988 he became the Principle Investigator for the North Central Regional Coordination Office of the Strategic Highway Research Program (SHRP). The North Central Region covers 13 states and 2 provinces. The Office was responsible for the setting up, evaluation and analysis of over 300 test sections in the region.

Since 1998 he has been a Research Associate and Adjunct Professor in the Civil Engineering Department back at the University of Minnesota. He has taught pavement and materials courses and worked on research projects including the work described in this presentation.

Dr. Skok is a Life Member of ASCE (President of the MN Section 1978-79), Association of Asphalt Paving Technologists (Secretary-Treasurer since 1969), International Society for Asphalt Pavements (Executive Administrator since 1996) MnAAPT, ASTM, TRB, MSES, Chi Epsilon. Tau Beta Pi and Plumb Bob. He was elected to the Asphalt Institute Roll of Honor in 1995.

Directors At-Large

Maria Carmen Rubio Gámez
University of Granada

Tom Scarpas
Delft University

Gabriele Tebaldi
University of Parma

Gabriele Tebaldi graduated at University of Parma in 1996 and got his PhD in Civil Engineering Construction of Road, Railway and Airport Program at University of Ancona (now Marche Polytechnic University) in 2000. He joined at University of Parma Road Materials Research group in 2000 and had the tenure track position in 2007. Dr. Tebaldi is Secretary of ISAP TC on Asphalt Pavement and Environment and serve as a Task Group leader on Rilem Committees on Testing and Characterization of Sustainable Innovative Bituminous Materials and Systems and Mechanisms of Cracking and Debonding in Asphalt and Composite Pavements. He is involved in the activities of TRB Committee on Pavement Maintenance and Sub-Committee on Interlayer Systems to Control Reflective Cracking. He served as reviewer for several scientific journals like International Journal Road Materials and Pavement Design, International Journal of Pavement Engineering, Materials and Structures, Journal of Materials in Civil Engineering; he was also Guest Editor of two Special Issue of International Journal Road Materials and Pavement Design. Dr. Tebaldi research interest are: recycling and re-use on road materials, advanced testing on bituminous materials, bituminous materials performances, cracking mechanics on asphalt mixes, reinforced pavement, stabilization of soils. He published several papers on peer review journals and international conferences on those topics. Dr. Tebaldi has scientific collaborations with University of Illinois, University of Minnesota, University of Florida, EMPA – Swiss Federal Laboratories for Material Testing and Research, IBDM – Road and Bridge Research Center and University of Stellenbosch.

Elie Hajj

Dr. Elie Hajj is a Professor in the Civil and Environmental Engineering Department and an Associate Director of the Western Regional Superpave Center (WRSC) at University of Nevada, Reno. He has over 18 years of experience in academia and industry with an emphasis on sustainability of pavement systems, dynamic response of pavement structures, and full-scale testing of pavement systems. Dr. Hajj authored over 100 publications in journals, national and international conferences, and technical reports. He made more than 100 presentations in professional meetings, conferences, seminars, and workshops. He served as a principal investigator on multiple projects for FHWA, FAA, State DOTs, local governments, and private industry.

Dr. Hajj is a member of the Association of Asphalt Paving Technologists (AAPT), American Society for Civil Engineers (ASCE), International Society for Asphalt Pavements (ISAP), and Transportation Research Board (TRB) Committees. He is a founding member and an elected officer for the Academy of Pavement Science & Engineering (APSE). Dr. Hajj is also an associate editor for the International Journal of Pavement Engineering (IJPE).

Navneet Garg

Dr. Navneet Garg is a Program Manager in Federal Aviation Administration’s Airport Technology R&D Branch at the William J. Hughes Technical Center in Atlantic City, New Jersey, and manages projects on Full-Scale Accelerated Pavement Tests, Pavement Materials, and Field Instrumentation and Testing. He earned his Ph.D. from the University of Illinois at Urbana-Champaign in 1997, M.S. from Illinois Institute of Technology at Chicago in 1993, and B.E from Karnataka Regional Engineering College (now National Institute of Technology) at Suratkal (India) in 1990, all in Civil Engineering. He has been actively involved in airport pavement research at the FAA’s National Airport Pavement Test Facility since 1998, and has authored several FAA technical reports, and over 100 research papers for various peer-reviewed journals and conference proceedings. He has taught in airport pavement design and evaluation workshops for International Civil Aviation Organization (ICAO), Asphalt Institute (AI), Airport Consultants Council (ACC), International Society for Asphalt Pavements (ISAP), American Society of Civil Engineers (ASCE), and other international organizations. He is a member of the TRB Committees on Geotechnical Instrumentation & Modelling (AKG60), and Aggregates (AKM80), ASCE, ASTM, ISAP, and APSE. He is the current Chair of ASCE T&DI Airfield Pavement Committee, and Vice-Chair of ISAP Technical Committee on Pavement Field Evaluation. He is an Associate Editor of International Journal of Pavement Engineering.

James Grenfell
Australian Road Research Board

Dr. Grenfell is a Senior Pavement Engineer at ARRB (Australian Road Research Board). Since joining the pavement team in February 2017, his work has focused on current Austroads projects looking at the improving knowledge of foamed bitumen stabilised pavements and the use of lightly cemented materials in pavement construction. Prior to this Dr Grenfell spent 13 years as a researcher at NTEC (Nottingham Transportation Engineering Centre) at the University of Nottingham in the UK. During this time he worked on and managed various projects related to pavement materials. These projects involved permanent deformation and fatigue properties of asphaltic materials, moisture damage in asphalt pavements, adhesion of bitumen to aggregate, warm mix asphalt technologies, the use of crumb rubber and recycled asphalt and alternative binders. His main research interests are the fundamentals of adhesion, moisture damage of asphaltic materials, recycling and the use of secondary materials.

Prior to working at NTEC James undertook a PhD in Metallurgy and Materials. The title of his PhD was The Effect of Macroalloying on the Microstructure and Mechanical Properties of γ-based Titanium Aluminides. This piece of work focused on the relationships between microstructure and mechanical properties, the application being the replacement of heavier steel parts in aero-engines.

Christiane Raab

Christiane Raab’s professional experience includes: Consulting Engineer at the Consulting Company Mann & Bernhardt, Darmstadt, Germany;  Senior scientist in the section road engineering/sealing components;  EMPA at Duebendorf, Switzerland.

Group leader Road Materials and Pavements, EMPA Laboratory for Road Engineering/Sealing Components; Consultant for the Swiss Road Authority ASTRA, Bern, Switzerland and EMPA representative notification and certification for construction materials.

Professional Activities:

Activities focus is on project management in connection with research and development assignments, damage investigation and consulting work, particularly in the field of mechanical behaviour and road design as well as administrative work.

Coordinator of the strategic priority field “Roads” Responsibility to ensure that the various activities and orders are dealt with uniformly at the project level and for overall knowledge management in this specialist area.

Key research fields:

Work associated with investigations into the interlayer bonding of asphalt surfaces, the investigation of thin layer behaviour in paving and the long-term behaviour of surfaces and the long term performance study and evaluation of asphalt pavement constructions. Further, material and test development work in such areas as foamed bitumen and model mobile load simulator. Work on binders, sealing materials and non-destructive testing, including research work in connection with infrared thermography and polymer-modified binders.

Author of comprehensive research and expert reports as well as nationally and internationally recognised articles in German and English for specialist journals. Speaker at national and international conferences (in German and English), see list of publication and talks).

Shigeki Takahashi

Shigeki Takahashi is a Chief Researcher for Pavement at Research Institute of NEXCO (Nippon Expressway Co. Ltd.) which is an authority for most of the expressway network in Japan ( He obtained a Master degree in Civil Engineering at Leeds University, UK in 1998, and PhD in Civil Engineering at Hokkaido University, JPN in 2013. Additional research for Porous Asphalt extended to study in EMPA 1999, as a guest researcher under Dr. Manfred Partl. Dr. Takahashi has nearly 30 year’s experience of expressway work including 6 years site engineer/supervisor and 16 years R&D in NEXCO. His main research is field study on pavement deterioration, bituminous materials and mixture, waterproofing on bridge decks, and so on. He worked for 4th APE ISAP Symposium 2017 in Tokyo, as a national supporting member. Currently, he is a member of Technical Committee of PIARC (representative of Japan for TC4.1 pavement).

Kamilla Vasconcelos

Kamilla Vasconcelos is originally from Fortaleza, Brazil. She graduated in Civil Engineering in 2002 from Federal University of Ceará (UFC), Brazil, and spend Spring and Fall semesters of 2000 at Technische Universitat Karslruhe, Germany, in an exchange program.  In 2004, she finished her Masters in Transportation Engineering at UFC, and in 2009 her PhD in Civil Engineering at Texas A&M University (TAMU), USA. In 2010 she did a Pos doc at the Polytechnic School of the University of São Paulo (USP), Brazil.

She is Associate Professor at the Polytechnic School of the University of São Paulo in the Department of Transportation Engineering and has published more than 100 technical papers in journals and conferences. She is peer reviewer in several international journals and part of the Editorial Board of Road Materials and Pavement Design (RMPD), International Journal of Pavement Engineering (IJPE), and Transportes. Kamilla is Director-at-Large of ISAP, member of TRB AKM20 Standing Committee (Binders for Flexible Pavement), and member of the AM3P Standing International Advisory Committee. Kamilla is involved in different research projects related to Transportation Infrastructure with focus on sustainability and biomaterials for pavement applications in the past years.


Association Members

Richard Willis

Saied Solomons
Sabita (Southern African Bitumen Association)
South Africa

Joined Sabita in his current position during April 2009. He spent 30 years in the oil industry with an international organisation in various functions covering engineering, distribution, sales and marketing across all product lines.  He later joined the executive board as the Director for HSEQ where after he moved on to take on the role of Sales & Marketing Director.  He holds a BComm degree and a Civil Engineering Certificate.

Hiroyuki Masuda
Japan Road Contractors Association (JRCA)


Technical Committee Leadership (ex-Officio)

Tom Scarpas, Chair (Amit Bhasin, Vice Chair)
TC on Constitutive Modelling of Asphaltic Materials

Gabriele Tebaldi, co-Chair
TC on Asphalt Pavement and Environment

Dave Eshan, Chair (Navneet Garg, Vice Chair)
TC on Pavement Field Evaluation