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Ippei Maruyama

Ippei Maruyama

Position
Visiting Professor
Email
Room Address
Room 546, ES Building
Research Interest
Cement chemistry, Concrete engineering, Structural engineering, Applied geochemistry, Nuclear engineering

Profile

Research themes include the coupling from nanoscale cement hydration behavior to meter-scale structural components. Other research areas encompass the study of fossil formation factors, development of interior and exterior finishing materials, development of inorganic high-durability materials through organic-inorganic interactions, development of materials applicable in extreme environments (radiation, space, marine, etc.), and management of reinforced concrete critical structures. Recipient of numerous awards, including the Young Scientist Award from the Minister of Education, Culture, Sports, Science and Technology; the Architectural Institute of Japan Award (Paper Award); the Concrete Institute of Japan Award (Paper Award) three times; and the Cement Association of Japan Award twice.

Professional affiliations

Architectural Institute of Japan, the Japan Concrete Institute, the Japan Society of Civil Engineers, the American Concrete Institute, the Cement and Concrete Research Association, the Society of Materials Science, Japan, the Atomic Energy Society of Japan, RILEM, and the International Committee on Irradiated Concrete (ICIC)

Biographical sketch

Dr. Ippei Maruyama is a Professor of Graduate School of Environmental Studies at Nagoya University and a Professor of Graduate School of Engineering at The University of Tokyo (cross-appointment). 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).

Honors and Awards

Recent Projects

Leading Projects

  • 2019 – present
    “Enhancement of soundness evaluation methods for concrete members in NPP (Phase 2)”, Collaboration with Chube Electric Power Company. (Technical lead)
  • 2018 – present
    “Moisture transport mechanism in cement-based materials under the first desorption process”, JSPS KAKENHI Grant-in-Aid for Scientific Research (A) 18H03804 )
  • 2017 - 2024 “Evaluation of soundness of concrete subjected to irradiation based on the mechanism of metamictization of rock-forming minerals”, Funded by METI, collaboration with Mitsubishi Research Institute and Kajima Corporation. (Project total: Technical lead)
  • 2017.12 - 2020.3
    ”Evaluation of concrete contamination of radio-active materials in Fukushima-daiichi plants based on a mechanism of their interaction with cement hydrates ”, Funded by MEXT, collaboration with NIES, JAEA, Tohoku University, and Takheiyo consultant.
  • 2017.10 - present
    ”Evaluation of soudness of concrete subjected to irradiation based on mechanism of metamictization of rock-forming minerals”, Funded by METI, collaboration with Mitsubishi Research Institute and Kajima Corporation.
  • 2015.4 - present
    ”Development of TEM observation technique for C-S-H/C-A-S-H”, non-funded collaboration with Prof. Shunsuke Muto, Nagoya University
  • 2014.4 - present
    ”1H-NMR relaxometry application for cement-based materials”, non-funded collaboration with Prof. Takahiro Ohkubo, Chiba University
  • 2015 - 2018.10
    ”Clarification of an action mechanism of SRA in hardened cement paste, ” collaboration with Ecole de Ponts ParisTech and LarfargeHolcim
  • 2015 - 2016
    ”Performance evaluation of RPV-pedestal of Fukushima-daiichi NPP”
  • 2015 - 2018.3
    ”Durability mechanics of concrete structure based on nano-atomic scale alteration of C-S-H”, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2014 - 2016.3
    “Control of alternation of colloidal C-S-H under drying process by nano-particles”, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2012 - 2020
    “Numerical simulation of long-term concrete performance in massive concrete members”, Kajima corporation.
  • 2011 - 2017.3
    “Performance evaluation of reinforced concrete member subjected to long-term neutrons and gamma-rays irradiation”, Nuclear Regulation Authority, Japan.
  • 2012 - 2015
    “Prediction of drying shrinkage of concrete”, Mitsubishi Material Corporation.
  • 2013
    “Movement of radioactive ingredient in building skin and evaluation of gamma-rays shielding performance of building materials”, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2011 - 2012
    “Evaluation of long-term concrete performance”, Kajima corporation.
  • 2009 - 2011
    “Systematically evaluation of hydration, hardening, and volume change of cement paste”, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2009 - 2011
    “Development of new exterior material from clay”, collaboration research with Ishikawa-toki Corp.
  • 2009 - 2010
    “Development of design method for high-durable reinforced concrete column used by ultra high-strength concrete”, collaboration research with Taiheiyo Cement Corp. and ANDO Corp., Grant-in-Aid for Development of Leading Technology related to Housings and Buildings, Ministry of Land, Infrastructure, Transport and Tourism.
  • 2009 - 2010
    “Mechanism of high cracking risk of blast furnace slag cement”, Japan Cement Association0.
  • 2008 - 2010
    “Evaluation of concrete soundness by using numerical model”, Projects on Enhancement of Ageing Management and Maintenance of Nuclear Power Stations, Nuclear and Industrial Safety Agency Japan.
  • 2007 - 2008
    “Evaluation of time-dependent performance of ultra high-strength concrete by using hydration model”, Japan Cement Association.
  • 2007 - 2008
    “Performance prediction of ultra high-strength concrete by using a numerical model”, collaboration research with Taiheiyo Cement Corp, Grant-in-Aid for Development of Leading Technology related to Housings and Buildings, Ministry of Land, Infrastructure, Transport and Tourism.
  • 2006 - 2008
    “Structural performance of full-scale reinforced ultra high-strength concrete members”, KAKEN, JSPS.
  • 2006 - 2007
    “Development of rapid hardening high-strength repair material”, Tokai industrial research promotion association.
  • 2005 - 2006
    “Reduction of autogenous shrinkage of high strength concrete by using saturated recycled aggregate”, Chugoku Construction Assosiation.
  • 2004 - 2005
    “Evaluation of soundness of high-strength concrete under restraint condition”, KAKEN, JSPS.
  • 2004
    “Effect of aggregate interface in recycled concrete aggregate on chloride diffusion”, Japan Cement Association.
  • 2002
    “Mechanism of shrinkage-induced crack reduction due to relaxation/creep behavior of hardened cement paste, Japan Cement Association.

Collaborative Projects

  • 2016 - 2020.3
    ”Development of Preservation/Renovation Techniques for Seismic Performance Improvement and Authenticity of Historical Buildings ”, Leader Prof. Yoshitaka Aoki (Nagoya city university), collaboration with Tokyo University, Tohoku University, Nihon University, Shibaura institute of technology, Nagasaki University, Miyazaki University, Toyohashi University of Technology, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2016 - 2019.3
    ”Development of high-durable composite using geopolymers, basalt fibers, and shape-memory alloies.”, Leader Prof. Yoshikazu Araki (Kyoto University), collaboration with Nihon University, Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2015 - 2018.3
    ”Application of calcite concretion to the engineering field”, Leader Prof. Hidekazu Yoshida (Nagoya University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2015 - 2018.3
    ”Formation of Iron-shell concretion”, Leader Prof. Hidekazu Yoshida (Nagoya University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2014-2017.3
    “Natural analog study on CaCO3 concretion in nature for self-healing process of crack in bedrock”, Leader Prof. Hidekazu Yoshida (Nagoya University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2010-2013
    “Research and investigation on repair, reinforcement, and preservation of cultural architectures damaged by terremoto dell’Aquila.”, Leader Prof. Takayoshi Aoki (Nagoya city University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2011-2013
    “Durability mechanics on shrinkage effect of reinforced concrete beam.” Leader Prof. Ryoichi Sato (Hiroshima University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2009-2011
    “Durability mechanics on reinforced concrete member with large shrinkage concrete.” Leader Prof. Ryoichi Sato (Hiroshima University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).
  • 2003-2004
    “Development of recycling technology of scrapping reinforced concrete members.” Leader Assoc. Prof. Takafumi Noguchi (The University of Tokyo), Grants-in-Aid for Scientific Research, Ministry of the Environment.
  • 2004-2006
    “Development of expansive high-strength concrete and systematization of structural response.” Leader Prof. Ryoichi Sato (Hiroshima University), Grants-in-Aid for Scientific Research (KAKEN), Japan Society for the Promotion of Science (JSPS).

Research Interests

  • Long time peformace evaluation of massive concrete for plant lifecycle management of nuclear power plant

    KEY WORDS: Strength, Young’s modulus, drying effect, heeting effect, C-S-H properties, thermodynamic analysis.

  • Development of non-shrinkage concrete

    KEY WORDS: Mechanism of shrinkage, and its control. Disjoining pressure concept is re-interpreted.

  • Modeling from cement hydration to detrioration of reinforced concrete and fracture of reinforced concrete structure

    KEY WORDS: modeling of hydration of cement and other mineral admixtures, shrinkage behavior, creep behavior, bond behevior around reinforcing bar, cracking behavior, coupled heat and moisture transport, ion tranportation, chemical reaction with carbonic anhydride, cloride ion, acid and so on.

  • Ultra High-Strength Concrete: Autogenous under temperature history, structral effect of Autogenous shrinkage

    KEY WORDS: This topic includes: developement of material for ultra high-sterength concrete and mixture propoertion, controlling autogenous shrinkage and heat of cement hydration, RC design considering concrete volume change and defect at initial stage due to volume change, modeling of RC structure with high-strength concrete.

  • Concrete aggregate problems

    KEY WORDS: Whethering of rocks, clay minerals, silicate minerals, alkali-aggregate reactions, volume change of aggregate.

  • New structural materials for Marine Plants

    KEY WORDS: salt, ultra-violet, cyclic loading, fatigue analysis.

  • Concrete with low environmental load: Recycled aggregate, By-product

    KEY WORDS: properties of recycled aggregate, properties of concrete for recycling material, durability of concrete with recycled aggregate, and behavior of reinforced concrete structure with recycled aggregate, properties of concrete using by-product.

For prospective students

Japanese government scholarship information can be obtained here.
In general, Japanese universities collect school fee, but there are many options to get scholarship and discharge.
Our laboratory often recruitment Post-doc or doctoral coarse student under big projects. Such information will be informed of top of the website or here.

Facilities

  • XRD (Bruker D8 Advance, Phaser)

  • SEM-EDS (Hitachi TM4000)

  • TG-DTA (Bruker)

  • TG-DSC (TA)

  • He pycnometry (Quantachrome)

  • H2O sorption (Quantachrome VSTAR, Microtrack Bel Bel-sorp I, Bel sorp-II)

  • Gas (N2) sorption (Bel-sorp I & II, Bel-mini)

  • DVS (Bruker, Japanese edition. TG + RH producer)

  • RH-TMA (Bruker, Japanese edition, TMA + RH producer)

  • DSC (Natzche)

  • Micro-indentation (Shimazu)

  • X-ray CT (Shimazu)

  • Carbonation chamber (Maruto)

  • Image analyser (Keyence IM-8000)

  • 1H-NMR relaxometry (Bruker biospin minispec, Oxford)

    Faculty engineering (common tool):

  • Solid NMR Bruker Avance-300/MHz spectrometer (Si), JEOL ECA700/MHz spectrometer (Al)

  • TMA

  • Raman (InVia, Renishaw plc)

Recent Published Papers

  1. Jinzewei Nie, Wei Wang, Yamei Zhang, Zedi Zhang, Takafumi Noguchi, Ippei Maruyama (2026) , "Geologically-inspired calcium carbonate-based sustainable cementitious materials" , Cement and Concrete Composites .
  2. Sayuri Tomita, Kazuo Yamada, Go Igarashi, Yoshifumi Hosokawa, Ippei Maruyama (2025) , "Interaction of Cs and Sr with C–A–S–H and Carbonated C–A–S–H phases: Experimental study and thermodynamic modeling" , Journal of Nuclear Materials .
  3. Yipu Guo, Fulin Qu, Wenkui Dong, Yizhe Wang, Doo-Yeol Yoo, Ippei Maruyama, Wengui Li (2025) , "Self-sensing performance of nanoengineered one-part alkali-activated materials-based sensors after exposure to elevated temperature" , Cement and Concrete Composites .
  4. Yuqi Ren, Atsushi Tomoyose, Ippei Maruyama (2025) , "Long-term hydration and pozzolanic reactivity of volcanic glass powder in blended cement systems: Microstructural evolution and compressive strength development" , Construction and Building Materials .
  5. Ippei Maruyama, Abudushalamu Aili, Shohei Sawada, Kazuhiro Yokokura, Yoshito Umeki (2025) , "Long-term use of modern portland cement concrete: change in strength due to reaction between aggregate and cement paste" , Journal of Building Engineering .
  6. Zhenli Yang, Taichiro Arai, Rie Maemoto, Takafumi Noguchi, Ippei Maruyama (2025) , "Wet Carbonation of Recycled Cement Paste Fines: Controlling Vaterite and ACC Precipitation with Ethylenediamine" , ACS Sustainable Chemistry & Engineering .
  7. Takumi Saito, Ippei Maruyama, Yuya Suda, Atsushi Teramoto, Ryoma Kitagaki, Takahiro Ohkubo (2025) , "Unveiling the Formation Pathway of Vaterite from Amorphous Calcium Carbonate Using Metadynamics Simulations" , ACS Omega .
  8. Takayoshi Fujimura, Yuji Hakozaki, Shunsuke Sakuragi, Yuu Nakajima, Kenta Murakami, Kiyoteru Suzuki, Ippei Maruyama, Takahiro Ohkubo (2025) , "The mechanical properties of irradiated concrete aggregates: Insights from molecular dynamics simulations" , Journal of the American Ceramic Society .
  9. Ryo Kurihara, Takahiro Ohkubo, Ippei Maruyama (2025) , "Emergence of an Isolated Pore within Calcium-Silicate-Hydrate Gel after Primary Desorption: Detection by 2D 1H NMR T1–T2 Correlation Relaxometry" , Langmuir .
  10. Naohiko Saeki, Ryo Kurihara, Takahiro Ohkubo, Atsushi Teramoto, Yuya Suda, Ryoma Kitagaki, Ippei Maruyama (2025) , "Semi-dry natural carbonation at different relative humidities: Degree of carbonation and reaction kinetics of calcium hydrates in cement paste" , Cement and Concrete Research , 189, 107777-107777 .
Professor Teshigawara's Final Undergraduate Class

Professor Teshigawara's Final Undergraduate Class

Professor Teshigawara, who taught for many years in the Concrete Engineering Laboratory and retired

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