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Structural Material and Concrete Structures Lab has been working on construction material and its structural properties under research themes which can revolutionize the conventional technologies. Our goal is to create a new concept or idea for the concrete technology by researching cement chemistry, concrete engineering, reinforced concrete structures, prestressed concrete structures and cement concrete pavement.

Research is based on experimental facts or engineering events and theory is developed based on the facts. On the clarification of the experimental facts, we attempt to find out useful information from an engineering perspective as well as interpret the phenomenon in physically, chemically or physicochemically correct way. In case of necessity, we carry out an experiment in boundary area or different field are carried out and advice or cooperation from researchers in the field are actively received. We always try to not only observe macroscopically but also pursue unit process microscopically. 

Our research topics are the tasks which require an immediate resolution in the standpoints of construction, maintenance and repair of concrete structures, and they can meet the social requirement in aspect of not only academic but also practical aspect. 
Extramural research and joint research with the government or companies are conducted and researches are promoted under cooperative framework. 
This can not only prevent the selection of the research topics from being self-approving with supported by the practicalities, but the results of our study can be returned to society sooner through the state measures or companies




Development, Structural Analysis and Design of
Ultra-High-Strength and Ultra-Long-Lifetime Concrete:
Lighter, Thinner, Longer, Higher and More Durable Concrete



Improvement of Properties of Fly Ash Concrete.

Improvement of properties of concrete containing fly ash has been investigated with an aim of effective utilization of fly ash obtained as a byproduct from coal power plants. We investigate on several mix proportions with different amounts of fly ash, and evaluate its contribution to strength and durability of concrete. In addition, to improve the properties at the early age and in long term, mix proportions and curing conditions that incorporate an internal curing method are also investigated. Based on the above investigations, a comprehensive evaluation of properties of fly ash itself as well as concrete containing fly ash is carried out in order to realize high performance fly ash concrete.



Impact of Volume Change and Temperature Change
on Shear Strength of RC Beams.

 Cracks on a bridge due to aggregate shrinkage have been reported and become a serious problem. For this reason, the effects of shrinkage as well as expansion resulting from materials, cement hydration, drying as well as heat on the shear strength of RC beams are investigated with an aim of establishing a design method that considers their effects.





Construction of Recycle System for Concrete
and Realization of Environmental Impact Reduction
for Building More Livable Social Environment



Internal curing with porous ceramic aggregate
and its effects on crack mitigation.

Cracking as a result of autogenous shrinkage in ultra-high strength concrete (UHSC) and late strength development of concretes containing waste resources such as blast furnace slag and fly ash has become a significant problem. We has investigated the effect of internal curing with porous ceramic roof tile aggregate on crack mitigation, focusing on fact that the porous ceramic roof tile aggregate has a comparatively high water absorption.



Environmental impact evaluation of concrete structures.

 In the life cycle of a concrete structure, the factors that burden the environment as well as those that contribute to its reduction are evaluated in this study with an aim of realizing a quantitative evaluation method of environmental impact related to concrete structures.




Development of Deterioration Prediction and
Safety Evaluation of Deteriorated and Aging Concrete Structures
for Placing Safer and More Durable in Service



Mechanism of chemical degradation of concrete

In order to contribute to future prediction of degradation in concrete, the degradation mechanisms in concrete from a chemical point of view due to factors such as carbonation, salt damage, sulfuric acid degradation among others are investigated in detail and the degradation models are built.






Transport mechanisms inside concrete

The understanding of the behavior of radioactive cesium infiltrated in concrete structures together with rain water as well as the long term behavior of heavy metals contained in concrete from industrial byproducts and wastes is important for effective utilization. In this study, the behaviors of water and moisture inside concrete as well as water together with the above named substances are experimentally investigated.