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Kishi Lab
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The lab studies cracking and deterioration in concrete by examining the mechanisms inside the material.
AboutAbout the lab
Uncovering the essence of phenomena and giving the results back to society.
The Kishi Lab studies the properties and performance evaluation of cement-based materials, as well as the development and practical application of new materials.
The lab also works on quality inspection and maintenance of concrete structures, and in recent years has focused on putting crack self-healing technology to practical use.
Research is conducted at the Komaba Research Campus, and at the Chiba Experiment Station in Kashiwa, the lab also carries out outdoor exposure tests on its large site.
The lab holds regular meetings and a summer retreat jointly with the Sakai (Yu) Lab.
Key terms
- Self-healing
- A phenomenon in which cracks that form in concrete close naturally, for example through reactions between water and the materials
- Chloride ions
- The salt component contained in seawater and similar sources. When they penetrate concrete, they can damage the steel reinforcement inside
- Pores
- Tiny gaps inside a material, too small to see. They serve as pathways for water and salts
NewsLab news
View More ↗ResearchResearch themes
With the aim of uncovering the essence of phenomena from a scientific perspective and giving the results back to society, the lab studies the physical properties of cement-based materials, their performance evaluation, the development and practical application of new materials, and quality inspection and maintenance of concrete structures. In recent years, it has been working on putting crack self-healing technology to practical use, evaluating the quality of structures, and the phenomenon in which chloride ion penetration stops.
*Illustrative imageConcrete whose cracks close on their own
The lab studies self-healing technology, in which cracks in concrete close by themselves, and its practical application. Through experiments, it has investigated how self-healing works with expansive additives and geomaterials, as well as watertightness and performance under cyclic loading.
*Illustrative imageChecking surface-layer quality and durability
The lab studies methods for checking the quality and durability of the near-surface zone of concrete structures. It has worked on developing a simple non-destructive test that assesses surface-layer quality by running water over the surface, and on examining how quality changes over time depending on mix proportions and curing.
*Illustrative imagePenetration of water and salt into concrete
The lab investigates how liquid water and salts penetrate into concrete. It has studied the mechanism of the stagnation phenomenon, in which chloride penetration stops partway, using methods that include optical experiments in nanoscale spaces.
*Illustrative imageFine pores and the transport of substances
The lab studies the relationship between the structure of the fine pores in hardened cement paste and how difficult it is for water and other substances to move through it. It also examines how the pore structure changes through repeated drying and wetting.
MembersFaculty
The members of the Kishi Lab consist of faculty, secretaries, technical specialists, senior collaborators, project researchers and commissioned researchers, and doctoral and master's students.As of 2026
- ProfessorToshiharu KishiPublications ↗
- Assistant ProfessorAkira HekizonoPublications ↗
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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: “Detail of vertical crack in concrete retaining wall at Medway Park Sports Centre, Gillingham, Kent, England” Sunolafjagtenben-hur / CC0 (cropped)
- Concrete whose cracks close on their own: “EMC RILEM Beam” Dr. Vladimir Ronin / EMC Cement / CC BY-SA 3.0 (cropped)
- Checking surface-layer quality and durability: “Grey speckled moderately cracked grubby grungy seamless concrete building wall texture” Sisters.seamless / CC0 (cropped)
- Penetration of water and salt into concrete: “Eroding Sea Wall - geograph.org.uk - 1262050” Simon Carey / CC BY-SA 2.0 (cropped)
- Fine pores and the transport of substances: “Little magic bubble inside autoclaved aerated concrete (AAC)” Tarmo Tamm (project manager), Markus Otsus, Artur Kaljo / CC BY 4.0 (cropped)
- Related lab (Concrete Lab): “Dogawa Dam” 河川一等兵 / CC BY-SA 4.0 (cropped)
- Related lab (Sakai Lab): “20mm-aggregate” Billbeee at English Wikipedia / CC BY 3.0 (cropped)
- Related lab (Mizutani Lab): “Ouster OS1-64 lidar point cloud of intersection of Folsom and Dore St, San Francisco” Daniel L. Lu / CC BY 4.0 (cropped)
- Related lab (Construction Management / Development Systems Lab): “Tsurumi-tsubasa-bridge” LERK / CC BY 2.5 (cropped)
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