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Chijiwa Lab
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A lab that builds on concrete and combines it with other fields to design next-generation infrastructure.
AboutAbout the lab
Building a richer future from concrete
Chijiwa Lab focuses on concrete, the basic material of infrastructure.
Building on concrete engineering, the lab actively pursues collaboration and integration with other areas of civil engineering and with other engineering fields.
Its work includes investigating the causes of long-term deformation in structures, evaluating the performance of corroded reinforced concrete (RC) and prestressed concrete (PC) structures, and developing geopolymer, a new material.
Using both experiments and numerical analysis, the lab uncovers how deterioration and damage occur.
Key terms
- Geopolymer
- A new concrete material made without cement, by hardening ash and similar materials with an alkali.
- Coupled material-structure response analysis
- An analysis method that links changes in material properties with how forces are transmitted through the whole structure in a single calculation.
- Sulfuric acid corrosion
- Deterioration in which sulfuric acid, produced in places such as sewers, dissolves concrete and makes it brittle.
NewsLab news
A student received the Civil Engineering Course Outstanding Master's Thesis Award
A paper from the lab received a Best Paper Award at an international symposium
A student received the MIP Award at Work in Progress 2024
A student received the Civil Engineering Course Outstanding Master's Thesis Award
ResearchResearch themes
Science and technology have advanced by dividing real-world phenomena and examining each in depth, but many of the problems now faced lie at the boundaries between fields. Building on concrete engineering, the lab promotes collaboration and integration with other areas of civil engineering and other engineering fields, aiming to create value that has not existed before.
*Illustrative imageLong-Term Deformation of Structures
Cases have been reported in which concrete structures several years to several decades after construction show deformation or damage that was not anticipated in design. Through field surveys and analyses using a coupled material-structure response analysis system, the lab identifies the causes.
*Illustrative imageCorroded RC and PC Structures
Corrosion of RC and PC structures has become a problem. The lab studies the structural performance of corroded structures through both experiments and analysis, aiming to establish accurate performance evaluation methods.
*Illustrative imageGeopolymers
The lab aims to clarify the reaction mechanisms and properties of geopolymers, which are expected to become a new concrete material, while also developing its own mix designs and manufacturing methods.
*Illustrative imageSewer Concrete
Through measurements and analyses in real environments, the lab clarifies how sulfuric acid corrosion degrades sewer concrete. It also works on assessing the risk of damage to sewer pipelines using GIS.
MembersFaculty
Chijiwa Lab consists of faculty, administrative staff, doctoral, master's, and undergraduate students, and visiting members.As of 2026
- ProfessorNobuhiro ChijiwaPublications ↗
- Assistant ProfessorSyll Amadou Sakhir
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
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On a 4-point scale, ● marks where students' answers fall
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ayunose bridge 1” MK Products at Japanese Wikipedia / CC BY-SA 3.0 (cropped)
- Long-Term Deformation of Structures: “Nagata Bridge” っ / CC BY-SA 3.0 (cropped)
- Corroded RC and PC Structures: “Concrete spalling caused by oxide jacking at the Herbst Pavilion, Fort Mason Center, San Francisco” Cullen328 (Jim Heaphy) / CC BY-SA 3.0 (cropped)
- Geopolymers: “SME fly ash based geopolymers” Fouad.belayali / CC BY-SA 4.0 (cropped)
- Sewer Concrete: “1405Pulilan Bulacan Road Constructions 07” Judgefloro / CC0 (cropped)
- Related lab (瀬尾研究室): “Lightrails, A4 motorway in Katowice, Poland, near the exit from Mikołowska Street, 2024” Krzysztof Popławski / CC BY 4.0 (cropped)
- Related lab (花岡研究室): “Container-Terminal Bremerhaven 02” H. Zell / CC BY-SA 3.0 (cropped)
- Related lab (吉村研究室): “Tama River, Japan; August 2016 (02)” 雷太 / CC BY 2.0 (cropped)
- Related lab (松﨑研究室): “022srUSGSCyprusVia” H.G. Wilshire, U.S. Geological Survey / Public domain (cropped)
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