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タイトル :Evaluation of Concrete Made from Recycled Coarse Aggregates by Pulsed Power Discharge
著者 :Narahara, Shouta
Namihira, Takao
Nakashima, Kazuyuki
Inone, Syouta
Iizasa, S.
Maeda, S.
Shigeishi, M.
Ohtsu, M.
Akiyama, Hidenori
刊行年月日 :2007-6
収録雑誌名 :Digest of Technical Papers-IEEE International Pulsed Power Conference
巻 :2007
開始ページ :748
終了ページ :751
要約(Abstract) :In Japan, the most of waste concrete scraps have been reused as roadbed materials and the recycling ratio of waste concrete scraps has been kept over 95 % from 2000. However, it is expected that the demands of waste concrete scraps as roadbed materials would decrease even though the waste concrete scraps increase with the pulling down buildings in next decade. These facts mean that the recycling of waste concrete scraps would be in the negative situation. Therefore, the development of new recycling technology of waste concrete scraps is paramount importance in Japan. In this work, the pulsed power discharges inside of waste concrete scraps immersed in water were used to reproduce the coarse aggregate. In the experiments, the Marx generator, which storages the energy of 6.4 kJ/Pulse, was used as pulsed power source and the point to hemisphere mesh electrode was immersed in water. The pulsed voltages with 400 kV of peak voltage were applied to the concrete scraps placed on hemisphere mesh and the reproduced coarse aggregates were evaluated after the repetitive discharge treatment. From the experimental results, it is found that the coarse aggregates reproduced by 40~60 pulsed discharge treatments have the enough qualities of the bone-dry density and the water absorption rate to satisfy JIS (Japan Industrial Standard) regulation (A 5005). In addition, the concretes consisted of the reproduced coarse aggregate also have the enough compressed strength and Young’s module to utilize as the construction material.
収録種別 :会議発表論文
出版社(者) :Institute of Electrical and Electronics Engineers
権利(Rights) :(c)2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
備考 :16th IEEE International Pulsed Power Conference, Albuquerque, New Mexico, June 17-22, 2007
URI :http://hdl.handle.net/2298/10318
このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/2298/10318