Complete recycling of concrete waste

To realize the complete recycling of waste concrete, we are developing a new recycling

technique that produces zero by-products and does not require new materials to recycle

concrete waste. 




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Understanding of deterioration mechanisms of concrete structures

We are trying to understand the deterioration mechanisms of concrete structures due to

freezing and thawing, chloride attack, etc. Model channels in the nano/microscale are utilized

to observe the deterioration process in concrete.




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Observation and analysis of concrete using special devices

To understand and evaluate concrete properties, we used various special devices, such as Focused

Ion beam-Scanning Electron Microscopy (FIB-SEM) to observe the three-dimensional pore structure

of concrete; Scanning Probe Microscopy (SPM) to measure microscopic surface property; and

Magnetic Resonance Imaging (MRI) to observe water permeation into concrete in a non-destructive





Related paper (Scanning probe microscopy on cement paste)

Related paper (3D pore network in concrete observed with FIB-SEM)

Related paper (Observation of water permeation in concrete using MRI)


Evaluation of water and gas permeation into concrete




Related paper (How to calculate air transport in concrete)

Related paper (Relationship between concrete pore size and mass transport)

Related paper (How to estimate water permeation into concrete using W/B and curing condition)


Deformation mechanism of concrete

Hardened cement paste is generally very brittle. However, we observed that it shows large

deformation without macroscopic damage under confining pressure, and we are trying to

understand this mechanism. We are working on this topic with the cooperation of geoscience





Related paper#1


Related paper#2


High-speed impact test

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Mechanism of evaporation reduction by curing agent


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