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Report No.
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Bond stress evaluation of reinforced concrete using neutron diffraction

Suzuki, Hiroshi  ; Kanematsu, Manabu*; Mukai, Tomohisa*

Recently, the neutron diffraction technique has been provided to some applications on the structural engineering studies of the RC. One of the most successful application among them is evaluation of the bond performance for the post-installed adhesive anchor. In the series of this work, the bond degradation mechanism of the post-installed adhesive anchor has been characterized by measuring bond stress distribution under various conditions, i.e. cyclic loading, high temperature and creep deformation. Another application is evaluation of the deterioration mechanism for the RC under corrosive environment. It has been confirmed that neutron diffraction can be a useful technique to investigate a change in bond condition owing to rebar corrosion. In addition to above works, bond deterioration of the RC subjected to high temperature assuming a fire damage has been also evaluated by measuring a change in the bond stress distribution before and after heating. The results obtained here suggest that neutron diffraction can provide insight into the real structural engineering issues on the RC structures. In this presentation, we will introduce some of the results obtained so far.

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