{"created":"2023-05-15T12:10:03.005466+00:00","id":15698,"links":{},"metadata":{"_buckets":{"deposit":"088b70df-7186-4803-ae3b-cc95a8a27d2f"},"_deposit":{"created_by":19,"id":"15698","owners":[19],"pid":{"revision_id":0,"type":"depid","value":"15698"},"status":"published"},"_oai":{"id":"oai:iwate-u.repo.nii.ac.jp:00015698","sets":["1504:1510"]},"author_link":["94565","94567","94568","94566","94570","94569"],"item_16_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-10-25","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"177","bibliographicPageStart":"167","bibliographicVolumeNumber":"67","bibliographic_titles":[{"bibliographic_title":"木材学会誌"}]}]},"item_16_date_6":{"attribute_name":"登録日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2022-06-16"}]},"item_16_description_11":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"半炭化チップの床下敷設利用（断熱資材）を想定し，加熱温度270～300℃，酸素濃度1～4％で半炭化させた木材（ベイマツ心材）について，質量減少率を指標に断熱性，吸湿性，強度性能などの変化を調べた。熱伝導率は質量減少率の増加につれて直線的に低下し，その低下率は質量減少率1％あたり約0.75％であった。熱伝導率低下の主要因は密度低下による空隙率の増加であったが，熱橋となる実質の熱伝導率も吸湿性低下と真密度低下によって最大5％低下することが熱伝導モデル解析から明らかとなった。質量減少率が40％に達すると圧縮強度およびせん断強度は1/4程度に低下したが，繰り返し落下衝撃による粉化率は10％以下に留まった。耐朽性が確保される質量減少率20％以上を前提とすれば，断熱性と耐衝撃性を両立させる半炭化条件は，質量減少率で20～40％の範囲と言える。","subitem_description_type":"Abstract"}]},"item_16_description_12":{"attribute_name":"Abstract","attribute_value_mlt":[{"subitem_description":"Assuming the use of semi-carbonized chips under the floor for thermal insulation, wood (Douglas fir heartwood) was semi-carbonized (torrefied) at heating temperatures of 270 to 300 ºC and oxygen concentrations of 1 to 4%. Changes in thermal insulation capacity, hygroscopicity, strength properties, and so on were investigated using the mass loss caused by semi-carbonization as an index. The thermal conductivity decreased linearly as the mass loss increased, and the rate of decrease was about 0.75% per 1% mass loss. The main cause of the decrease in thermal conductivity was the increase in porosity due to the decrease in density. However, the heat transfer model analysis revealed that the thermal conductivity of the substance (heat bridge) decreased by up to 5% due to the decreases in hygroscopicity and substance density. Although the compressive strength and shear strength decreased to about 1/4 when the mass loss reached 40%, the pulverization rate due to repeated drop impacts remained below 10%. Assuming that a mass loss of 20% or more ensures decay resistance, the semi-carbonization condition that achieves both thermal insulation and impact resistance was judged to be in the range of 20 to 40% in terms of mass loss.","subitem_description_type":"Other"}]},"item_16_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"94568","nameIdentifierScheme":"WEKO"}],"names":[{"name":"SEKINO, Noboru"}]},{"nameIdentifiers":[{"nameIdentifier":"94569","nameIdentifierScheme":"WEKO"}],"names":[{"name":"TANABE, Katsumi"}]},{"nameIdentifiers":[{"nameIdentifier":"94570","nameIdentifierScheme":"WEKO"}],"names":[{"name":"JIANG, Zhuoqiu"}]}]},"item_16_link_13":{"attribute_name":"抄録（URL）","attribute_value_mlt":[{"subitem_link_text":"半炭化された木材の断熱性と強度","subitem_link_url":"https://www.jstage.jst.go.jp/article/jwrs/67/4/67_167/_article/-char/ja"}]},"item_16_publisher_14":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本木材学会"}]},"item_16_relation_26":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.2488/jwrs.67.167","subitem_relation_type_select":"DOI"}}]},"item_16_rights_18":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2021 日本木材学会"}]},"item_16_source_id_25":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AN00240329","subitem_source_identifier_type":"NCID"}]},"item_16_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"18807577","subitem_source_identifier_type":"ISSN"},{"subitem_source_identifier":"00214795","subitem_source_identifier_type":"ISSN"}]},"item_16_text_4":{"attribute_name":"著者(機関)","attribute_value_mlt":[{"subitem_text_value":"岩手大学農学部"},{"subitem_text_value":"岩手大学農学部 , 東京農工大学大学院農学府"},{"subitem_text_value":"岩手大学大学院連合農学研究科"}]},"item_16_version_type_27":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"関野, 登"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"田名部, 功幹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"姜, 卓秋"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2022-06-16"}],"displaytype":"detail","filename":"mg-v67n4p167-177.pdf","filesize":[{"value":"840.4 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"mg-v67n4p167-177","url":"https://iwate-u.repo.nii.ac.jp/record/15698/files/mg-v67n4p167-177.pdf"},"version_id":"4ab3e01e-9d5a-4405-807e-8a72be278b4a"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"semi-carbonization ( torrefaction )","subitem_subject_scheme":"Other"},{"subitem_subject":"mass loss","subitem_subject_scheme":"Other"},{"subitem_subject":"thermal conductivity","subitem_subject_scheme":"Other"},{"subitem_subject":"hygroscopicity","subitem_subject_scheme":"Other"},{"subitem_subject":"strength properties","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"半炭化された木材の断熱性と強度","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"半炭化された木材の断熱性と強度"},{"subitem_title":"Thermal Insulation and Strength Properties of Semi-carbonized Wood","subitem_title_language":"en"}]},"item_type_id":"16","owner":"19","path":["1510"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-06-16"},"publish_date":"2022-06-16","publish_status":"0","recid":"15698","relation_version_is_last":true,"title":["半炭化された木材の断熱性と強度"],"weko_creator_id":"19","weko_shared_id":-1},"updated":"2023-05-15T12:48:16.588119+00:00"}