Dr. Ippei Maruyama is a Professor of Graduate School of Engineering at The University of Tokyo (cross-appointment) and a Professor of Graduate School of Environmental Studies at Nagoya University. He earned his B.Eng. in 1998, M.Eng. in 2000 and Dr.Eng. in 2003 from The University of Tokyo. Before he joined Nagoya University, he was visiting researcher at Delft University of Technology and assistant professor at Hiroshima University. He became a professor in 2016 in Nagoya University, then joined the University of Tokyo as a Professor.

He is a past chair of international committee on irradiated concrete, a Bureau member of RILEM, the editor in chief of Journal of Advanced Concrete Technology, and an associate editor of Materials and Structures. He is leading several national projects relating to aging management of concrete structures in nuclear power plants, Fukushima daiichi decommissioning process, and a long-term use of concrete structures.

His current research topics include architectural engineering, building material engineering, design of concrete structures, 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).


Running projects

(UT+NU) Multi-scale research on impact of drying on mechanical performance of cement based materials and their structures.

Funded projects:

  • JSPS-KAKENHI (18H03804) “Mechanism of moisture transport in cement based materials under the first desorption” (FY2018 – 2022)
  • JSPS-KAKENHI (15H04077 ) “Durability mechanics of concrete structure based on nano-atomic scale alteration of C-S-H” (FY2015-2017)
  • JSPS-KAKENHI (26630254) “Control of aging of C-S-H by using nano-scale materials” (FY 2014 – 2015)
  • JSPS-KAKENHI (19H00791) “Structural performance change in RC buildings due to drying” (project head: Prof. Masaomi Teshigawara) (FY2019-2022)
  • Ministry of Land, Infrastructure, Transport and Tourism, Building Standards Law Expanding Research S30, “Study on Evaluation Method of Vibration Damping of Buildings for Improvement of Calculation Accuracy of Response Displacement in Limit Strength Calculation of Reinforced Concrete Structures” (project head: Prof. Masaomi Teshigawara)
  • Collaboration research with Navier, Ecole des Ponts, CNRA and LafargeHolcim (FY2015-2018)

Related papers:

(UT+NU)Natural/Artificial carbonate-concretion formation

Funding projects:

  • NEDO: C4S project (Calcium carbonate concrete system for sustainability), PJ3 technical lead (FY2020-2022)
  • JSPS-KAKENHI (18H03893) Application of natural calcium carbonate concretion for occlusion (Project leader: Prof. H. Yoshida, FY2018 – 2021 )
  • JSPS-KAKENHI (15H04224) Application of natural calcium carbonate concretion for occlusion (Project leader: Prof. H. Yoshida, FY2015 – 2018)
  • JSPS-KAKENHI (15H05227) Applied geo-scientific field study on Fe-concretion and multi-species ion transfer (Project leader: Prof. H. Yoshida, FY2015 – 2017 )
  • JSPS-KAKENHI (26630464) Natural analogue of occlusion of cracking due to carbonate concretion (Project leader: Prof. H. Yoshida, FY2014-2017)

Relevant papers:

(NU) Concrete degradation under neutron and gamma-ray irradiation environments

Funded projects:
– Evaluation of soundness of concrete subjected to irradiation based on mechanism of metamictization of rock-forming minerals,
Funded by METI, collaboration with Mitsubishi Research Institute, Nagaoka University of Technology, Mitsubishi Research Associates, Kajima Corporation, UJV-REZ, and so on. (FY2017-2022)

Relevant papers:

(NU) Enhancement of soundness evaluation for concrete structures and members by using the data harvested from decommissioning nuclear power plants

Funded projects:

  • Soundness evaluation of concrete members phase I, collaboration with Chube electric company (FY2017-2019)
  • Soundness evaluation of concrete members phase II, collaboration with Chube electric company (FY2020-2023)

Relevant papers:

(UT) Estimation of radio-active element contamination in concrete of Fukushima Daiichi plants

Other papers:


Google Scholar


ResearchMap (in Japanese)