Search Results 1-11 of 11

  • Effect of soil profile structure on seasonal changes of soil temperature in urban forests

    MIYAJIMA Seiya , MATSUDAIRA Hayato , WATANABE Makiko

    … From February to April, the soil temperature was higher in the undisturbed profile, having lower soil pH (acidic), lower compaction, smaller bulk density, and larger carbon content, than in the lithological disturbed profile containing a large amount of concrete rubbles with higher soil pH (neutral to weak alkaline), higher compaction, larger bulk density, and smaller carbon content. …

    Geographical Reports of Tokyo Metropolitan University (52), 11-22, 2017

    IR 

  • Study of Seaweed Breeding Reef Recycling the Concrete Rubble Which Occurred in the Earthquake Disaster  [in Japanese]

    ITO Yasushi , FUDO Masayuki , TANAKA Kosei , WATANUKI Akira

    2011年3月11日の東日本大震災に伴い，被災地では膨大な量の災害廃棄物が発生し，岩手，宮城，福島の3県で発生した災害廃棄物量は約2,200万トンにのぼった。被災地の早期の復興には，迅速な処理が必要であった。災害廃棄物のうち，コンクリート構造物などから発生したコンクリートくず(以下，コンクリートがら)，金属くずなどが，材料として再生利用が可能なものと考えられた。金属くずは再生処理業者により有価物と …

    Journal of Fisheries Engineering 53(2), 73-80, 2016

    J-STAGE  JASI 

  • Radio Channel Models for Search-and-Rescue Missions into Collapsed Structures

    Claude Oestges

    IEICE Proceeding Series (30), 1015-1018, 2013

    DOI 

  • CO_2 Uptake over Service Period of Concrete Structures and Recycling Process of Concrete Rubbles  [in Japanese]

    KANDA T. , SONE S. , KISHIDA H.

    セメント水和物の炭酸化によるCO<sub>2</sub>固定は広く認知されているものの，定量的な知見の蓄積は十分になされておらず，コンクリートにかかわるCO<sub>2</sub>排出量計算においては考慮されていない。そこで，コンクリートの供用，再資源化を通じたCO<sub>2</sub>固定量に関する基礎的データを幅広く得る …

    Concrete Journal 49(8), 9-16, 2011-08-01

    J-STAGE  References (26)

  • Development of a counter-weight type armor block for accidental wave loads

    MASE Hajime , HIRAISHI Tetsuya , KAWATA Tatsuya , BABA Yasuyuki , TOKUNAGA Seishi , MATSUSHITA Hiroshi

    … In the paper, a physical experiment is carried out to evaluate the friction factor of the counter-weight blocks and to compare with a normal type flat armor concrete block. … The friction factor of counter-weight block with rubbles inside the center hole becomes larger than that of the normal one. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 67(2), I_696-I_700, 2011

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  • Development of a counter-weight type armor block for accidental wave loads  [in Japanese]

    間瀬 肇 , 平石 哲也 , 川田 達也

    … In the paper, a physical experiment is carried out to evaluate the friction factor of the counter-weight blocks and to compare with a normal type flat armor concrete block. … The friction factor of counter-weight block with rubbles inside the center hole becomes larger than that of the normal one. …

    土木学会論文集B2(海岸工学) 67(2), I_696-I_700, 2011

    IR 

  • Recycling concrete rubbles with reactive aggregates from ASR-affected bridge pier

    Sugiyama A. , Torii Kazuyuki , Sakai K. , Shimizu K. , Sato Y.

    … However, in the inspection carried out in 2004, it was found that half of stirrup steel bars in the pillow beam fractured at the bending corner of steel bar due to the excessive ASR expansion of concrete. … For this reason, the pillow beam of the Kashima Bridge was completely reconstructed by removing all the concrete in 2005. …

    Proceedings of the 4th International Structural Engineering and Construction Conference, ISEC-4 - Innovations in Structural Engineering and Construction (1), 605-611, 2008-09-01

    IR 

  • A STUDY ON EVALUATION OF ALKALI-SILICA REACTIVITY OF RECYCLED AGGREGATE CONCRETE AND PROPOSAL FOR MITIGATION OF ASR  [in Japanese]

    TORII Kazuyuki , SUGIYAMA Ayanori , SAKAI Kenta

    鹿島橋では，アルカリシリカ反応 (ASR) により鉄筋破断をともなう，大きな損傷が発生し，2005年に橋脚の梁部がすべて打替えられた．この際に，再生骨材のアルカリシリカ反応性を評価することを目的にして，安山岩を含有する解体コンクリート塊より再生骨材を製造した．一連の試験より，再生骨材のアルカリシリカ反応性は化学法やモルタルバー法による判定が困難であり，再生骨材コンクリートの促進養生条件下での膨張率 …

    Doboku Gakkai Ronbunshuu G 63(4), 313-325, 2007

    J-STAGE 

  • INFLUENCE OF WAVE INDUCED VORTEX FLOWS ON THE STABILITY OF ARMOUR UNITS ABOUT A CURTAIN WALLED DISSIPATER  [in Japanese]

    JINNO Mitsuteru , ONODUKA Takashi , NAKAMURA Takayuki

    … However it may be concerned that the stability of rubbles in front of the dissipater due to generation of strong vortex flows.<BR>In this study, to protect the rubbles in front of the dissipater from wave induced vortex flows, the stability of amour concrete units is examined experimentally. …

    PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN (22), 757-762, 2006

    J-STAGE 

  • FUNDAMENTAL STUDY ON MANUFACTURING METHOD OF LARGE PARTICLE SIZE POROUS CONCRETE USING CONCRETE RUBBLE AND APPLICABILITY AS FISHING BANK  [in Japanese]

    MAEGAWA Akihiro , HATANAKA Shigemitsu , MISHIMA Naoki , YUASA Yukihisa

    … To expand the usage of porous concrete, the authors have examined manufacturing method of large particle size porous concrete using concrete rubble. … In the manufacture of large particle size porous concrete, in stead of manufacturing with a mixer, the binder mortar was splayed on the upper surface of the concrete rubbles of every layer. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 70(589), 43-48, 2005

    J-STAGE  AIJ  References (16) Cited by (2)

  • Verification Test for Decommissioning Waste Processing System:A Technique on Utilization of Radioacitive Concrete for Filling Materials

    UEKI HIROYUKI , MURATA KOUZOU , ISHIKURA TAKESHI , OHNISHI KAZUHIKO

    原子力施設の廃止措置に伴なって多量の放射性コンクリート廃棄物が発生する。これを、放射性廃棄物の充填材として再利用することにより廃棄物充填率を増加させ廃棄体数を削減することができる。これまでに充填材の配合試験や、角型鋼製容器(5m3)の一部を模擬した要素モデルや実規模モデルによる充填試験により充填特性を確証してきた。今回は、既報の部分を含めて、全体概要を紹介するとともに、一部追加調査結果を報告する。

    Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan 2004s(0), 672-672, 2004

    J-STAGE 

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