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Proceedings Paper

Observation of the dynamic movement of fragmentations by high-speed camera and high-speed video
Author(s): Chul-Gi Suk; Yuji Ogata; Yuji Wada; Kunihisa Katsuyama
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Paper Abstract

The experiments of blastings using mortal concrete blocks and model concrete columns were carried out in order to obtain technical information on fragmentation caused by the blasting demolition. The dimensions of mortal concrete blocks were 1,000 X 1,000 X 1,000 mm. Six kinds of experimental blastings were carried out using mortal concrete blocks. In these experiments precision detonators and No. 6 electric detonators with 10 cm detonating fuse were used and discussed the control of fragmentation. As the results of experiment it was clear that the flying distance of fragmentation can be controlled using a precise blasting system. The reinforced concrete model columns for typical apartment houses in Japan were applied to the experiments. The dimension of concrete test column was 800 X 800 X 2400 mm and buried 400 mm in the ground. The specified design strength of the concrete was 210 kgf/cm2. These columns were exploded by the blasting with internal loading of dynamite. The fragmentation were observed by two kinds of high speed camera with 500 and 2000 FPS and a high speed video with 400 FPS. As one of the results in the experiments, the velocity of fragmentation, blasted 330 g of explosive with the minimum resisting length of 0.32 m, was measured as much as about 40 m/s.

Paper Details

Date Published: 30 May 1995
PDF: 12 pages
Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); doi: 10.1117/12.209574
Show Author Affiliations
Chul-Gi Suk, Kacoh Co. Ltd. (Japan)
Yuji Ogata, National Institute for Resources and Environment (Japan)
Yuji Wada, National Institute for Resources and Environment (Japan)
Kunihisa Katsuyama, National Institute for Resources and Environment (Japan)


Published in SPIE Proceedings Vol. 2513:
21st International Congress on: High-Speed Photography and Photonics
Ung Kim; Joon-Sung Chang; Seung-Han Park, Editor(s)

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