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Social Infrastructure Design Lab
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A lab studying nondestructive testing to investigate internal deterioration of concrete structures without damaging them.
AboutAbout the lab
Scientifically uncovering the health of social infrastructure
The Social Infrastructure Design Lab (Kamada Lab) conducts research to improve maintenance technologies for social infrastructure structures.
The lab works on nondestructive testing to examine internal defects and rebar corrosion in concrete structures without damaging them, and on clarifying the mechanisms by which deterioration occurs.
For steel structures, the lab also studies how to evaluate fatigue performance under repeated loading.
The lab's philosophy is to scientifically clarify the health of social infrastructure and open up next-generation diagnostic technologies.
Key terms
- Nondestructive testing
- Inspection that examines internal defects and the state of deterioration of an object without damaging it
- PC grout
- A filling material that protects PC steel from corrosion. Insufficient filling can lead to rupture of the steel
- Post-installed anchor
- An anchor attached to concrete after it has been built in order to fix things in place. Widely used for seismic retrofitting of civil engineering structures
ResearchResearch themes
To improve maintenance technologies for social infrastructure structures, the lab studies nondestructive testing of concrete structures, the mechanisms of deterioration, and the evaluation of fatigue performance in steel structures. It works toward establishing methods to examine the internal condition of structures, such as deck slabs and rebar, without destroying them.
*Illustrative imageDefect Detection in RC Deck Slabs
In road bridge deck slabs, loss of load-bearing capacity due to damage such as cracking is becoming serious. The lab is working to establish methods for detecting defects inside deck slabs without destroying them, so that they can be used from evaluating current performance to evaluating the quality of construction after repair.
*Illustrative imageInspection of PC Grout Filling
PC grout protects PC steel from corrosion, but insufficient filling can lead to rupture of the PC steel and reduce the load-bearing capacity of the whole structure. The lab studies nondestructive methods to inspect the filling condition, which is hard to confirm visually.
*Illustrative imageEvaluating the Anchorage Condition of Post-Installed Anchors
Post-installed anchors are widely used in applications such as seismic retrofitting of civil engineering structures. Aiming at evaluation of anchorage condition that works regardless of anchor type or size, the lab seeks to advance evaluation techniques using a variety of nondestructive methods.
*Illustrative imageDetection and Evaluation of Rebar Corrosion
As corrosion of rebar inside concrete progresses, the strength of the structure may decline. The lab works toward establishing nondestructive methods to detect and evaluate the corrosion state of internal rebar.
MembersFaculty
The members of Kamada Lab consist of faculty, project researchers, visiting professors, visiting associate professors, and visiting researchers, secretaries, and master's and undergraduate students.As of 2026
- ProfessorToshiro Kamada
- ProfessorSeiichiro Tsutsumi
- Project ProfessorMasaru Nagayama
- Project Associate ProfessorNatsuki Yoshida
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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: “Whittier Bridge- Arch span deck is ready for concrete ( )” MassDOT / Public domain (cropped)
- Defect Detection in RC Deck Slabs: “Bridge deck - punching failure bottom cracking” Slabarcher / CC BY-SA 3.0 (cropped)
- Inspection of PC Grout Filling: “Maats Ashdod Prestressed Concrete” photographers unknown, PD in Israel after 50 years. / Public domain (cropped)
- Evaluating the Anchorage Condition of Post-Installed Anchors: “Ancor bolt for concrete” Dmitry G / CC BY-SA 3.0 (cropped)
- Detection and Evaluation of Rebar Corrosion: “Concrete wall cracking as steel reinforcing corrodes and swells 9058” JonRichfield / CC BY-SA 3.0 (cropped)
- Related lab (Structural Engineering Lab): “Fledborough viaduct welded steel bridge girders - geograph.org.uk - 4728457” Steve Fareham / CC BY-SA 2.0 (cropped)
- Related lab (Social Infrastructure Management Lab): “Singlewell Infrastructure Maintenance Depot - geograph.org.uk - 2084061” screen42 / CC BY-SA 2.0 (cropped)
- Related lab (Concrete Structures Lab): “Haitian national palace earthquake” Logan Abassi / UNDP Global / CC BY 2.0 (cropped)
- Related lab (Marine Materials and Production Engineering Lab): “Shipbuilding, Liverpool 1944” 作者不詳 / Public domain (cropped)
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