Dr. Ippei Maruyama is a professor of The University of Tokyo and a professor of Graduate School of Environmental Studies at Nagoya University. He is also visiting Professor of Tohoku university relating to Nanoterasu synchrotron facility.
He earned his B.Eng. in 1998, M.Eng. in 2000 and Dr.Eng. in 2003 from The University of Tokyo. Before he joined The University of Tokyo, he was visiting researcher at Delft University of Technology and assistant professor at Hiroshima University. His current research topics include architectural engineering, building material engineering, design of concrete structures, cement chemistry and concrete engineering, aging management of concrete structures, preservation of historical buildings and civil structures, radiation physics and chemistry for concrete, cement chemistry, applied geochemistry (mainly calcite and ferrite concretion phenomena, and geo-material applications).

Major awards:
2007 AIJ (Architectural Institute of Japan) Young Researcher Award
2009 37th Paper award of Japan Cement Association
　　　”Analysis of Moisture Transport in Concrete Including Cracks by Neutron Radiography”
2010 38th Paper award of Japan Cement Association
　　　”Volume Change of Hardened Cement Paste at Early Age”
2012 AIJ Prize (Research Paper Division)
　　　”A series of studies on reaction, movement, and volume change related to water in concrete”
2013 The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology Award for Young Scientists
　　　”Water-related volume changes in cementitious materials”
2014 RILEM Materials and Structures: Best Reviewer Award
2015 Outstanding paper of the year, Journal of Advanced Concrete Technology
2016 Japan Concrete Institute Award (Paper Award)
　　　”Numerical Approach towards Aging Management of Concrete Structures”
2016 Outstanding paper of the year, Journal of Advanced Concrete Technology
2017 Japan Concrete Institute Award (Paper Award)
　　　”Action Mechanisms of Shrinkage Reducing Admixture in Hardened Cement Paste”
2017 Japan Concrete Institute Award (Paper Award)
　　　”A Numerical Model for Concrete Strength Change under Neutron and Gamma-ray Irradiation”
2017 Outstanding paper of the year, Journal of Advanced Concrete Technology
2018 Japan Concrete Institute Award (Paper Award)
　　　”Development of Soundness Assessment Procedure for Concrete Members Affected by Neutron and Gamma-Ray Irradiation”
2018 Outstanding paper of the year, Journal of Advanced Concrete Technology
2019 Japan Concrete Institute Award (Paper Award)
　　　”Impact of Drying on Structural Performance of Reinforced Concrete Shear Walls”
2020 Outstanding paper of the year, Journal of Advanced Concrete Technology
2021 Japan Concrete Institute Award (Paper Award)
　　　”Hydrogen production and the stability of hardened cement paste under gamma irradiation”
2021 Outstanding paper of the year, Journal of Advanced Concrete Technology
2022 Japan Concrete Institute Award (Paper Award)
　　　”Meso-Scale Modelling of the Mechanical Properties of Concrete Affected by Radiation-Induced Aggregate Expansion”
2022 Outstanding paper of the year, Journal of Advanced Concrete Technology
2023 Japan Concrete Institute Award (Paper Award)
　　　”A New Concept of Calcium Carbonate Concrete using Demolished Concrete and CO2″
2023 51st Paper award of Japan Cement Association
　　　”Effect of RH on Carbonation of hardened cement paste particles under general atmospheric CO2 concentration studied by FTIR spectroscopy”
2023 Cement and Concrete Research “Le Châtelier Distinguished Paper Award 2021″
　　　”Mechanism of drying-induced change in the physical properties of concrete: A mesoscale simulation study”