小径ドリル型削孔試験機の改良とコンクリートへの適用のための検討

書誌事項

タイトル別名
  • STUDY ON IMPROVEMENT OF SMALL-DIAMETER DRILLING TESTER AND IT’S APPLICATION EXAMINATION FOR CONCRETE
  • ショウケイ ドリルガタサクコウ シケンキ ノ カイリョウ ト コンクリート エ ノ テキヨウ ノ タメ ノ ケントウ
  • STUDY ON IMPROVEMENT OF SMALL-DIAMETER DRILLING TESTER AND IT’S APPLICATION EXAMINATION FOR CONCRETE

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抄録

A small-diameter drilling tester developed by the authors is one of the slight-destructive testers, with which the damage of materials tested can be very small. To apply the tester for checking the strength of compound materials e.g. Portland cement mortars, concretes etc., a series of experiments was carried out 1) to avoid the ill effect of cement powder discharged around a drill, 2) to avoid drilling coarse aggregates, and 3) to know the best magnitude of pressure for drilling. As a result, it is clarified that the testing method may be improved by considering the obtained data.

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