EXPERIMENTAL STUDY ON THE METHOD AND FREQUENCY OF CERTIFICATION FOR REBOUND HAMMER

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  • HARUHATA Masakazu
    Materials Department, Research & Testing Center, General Building Research Corporation of Japan
  • HAMASAKI Hitoshi
    Dept. of Building Materials and Components, Building Research Institute
  • NAGAYAMA Masaru
    Materials Department, Research & Testing Center, General Building Research Corporation of Japan
  • YAMAMOTO Hideki
    Quality Management Department, Research & Testing Center, General Building Research Corporation of Japan General Building Research Corp.

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  • リバウンドハンマーの検定頻度および検定方法に関する実験的検討
  • リバウンド ハンマー ノ ケンテイ ヒンド オヨビ ケンテイ ホウホウ ニ カンスル ジッケンテキ ケントウ

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Rebound number by rebound hummer for estimation of concrete strength decline by the repetitional use. And, it knows that there is a individual difference of the hammer. To get a proper measurement, we must take regularly certification and maintenance.<br>This paper reports the result of the experiments about the decline by repetitional use and individual difference of each hammer. As those results, we propose the strategy and frequency of certification.

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