STUDY ON BOND PERFORMANCE OF REINFORCED CONCRETE SUBJECTED TO HIGH-TEMPERATURE HISTORY AND RESTORATION BY RE-CURING USING NEUTRON DIFFRACTION

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  • KOYAMA Taku
    The University of Tokyo, School of Engineering, Dept. of Arch.
  • NISHIO Yuhei
    Building Research Institute, Dept. of Fire Engineering
  • KANEMATSU Manabu
    Tokyo University of Science, Dept. of Arch., Faculty of Sci. and Tech.

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Other Title
  • 中性子回折法を用いた高温加熱後の鉄筋コンクリートにおける付着特性及び再養生による回復に関する研究

Abstract

<p>In this study, The bond performance of reinforced concrete having a thermal history was evaluated using neutron diffraction. And The restoration of bond stress by re-cured for 3 days was estimated by the same method. As a result, Local restoration of bond stress was observed in specimen with a re-cured after being heated at 600°C. However, In the case of re-cured for 3 days after being heated at 600°C, Restoration of the average bond stress did not occurred. Also, When the conventional method of evaluating bond performance was applied with heated concrete, Some differences were observed between measured value.</p>

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