{"created":"2021-03-01T06:21:43.993927+00:00","id":14609,"links":{},"metadata":{"_buckets":{"deposit":"9e776995-ef2e-4198-95f5-075371ab5506"},"_deposit":{"id":"14609","owners":[],"pid":{"revision_id":0,"type":"depid","value":"14609"},"status":"published"},"_oai":{"id":"oai:nagoya.repo.nii.ac.jp:00014609","sets":["879:1183:1184:1395"]},"author_link":["83272","83273","83274","83275","83276","83277","83278","83279"],"item_1615768549627":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_9_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Evaluation of carbonation process in concrete with analysis of carbon and oxygen isotopes","subitem_alternative_title_language":"en"}]},"item_9_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"151","bibliographicPageStart":"140","bibliographicVolumeNumber":"22","bibliographic_titles":[{"bibliographic_title":"名古屋大学加速器質量分析計業績報告書","bibliographic_titleLang":"ja"}]}]},"item_9_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Carbon and oxygen isotopes including radiocarbon have been applied to concrete in order to estimate progression and age of carbonation in concrete. Concrete cores from a building constructed in 1967 on the campus of Nagoya University, Japan, were collected in 2008, and were investigated for 14C, δ13C, δ18O, and CO2 content. The amount of carbon dioxide was 9 % at the concrete surface where the concrete is highly carbonated, decreasing with depth, and was 1% at the depth where carbonation is hardly observed. The measured 14C values were 139 to 148 pMC at the carbonated surface and 71 to 86 pMC at the depth of less carbonation, decreasing from the surface down to the depth. These profiles can be interpreted as the following: (1) Comparison of C and O isotope data including 14C from the concrete with those from cements and fresh concrete reveals that the carbon dioxide at the depth of less carbonation was fixed in the construction time of the building, and that the primary CO2 originated from cements (marine limestone origin) and direct absorption of atmospheric CO2 in 1967 throughout the whole of the concrete. (2) After the correction for 14C value of the primary CO2, the age of carbonation at the concrete surface (1cm) can be estimated by the 14C dating coupled with the atmospheric 14C curve over the past 50 yr (Hua and Barbetti, 2004). Most part of CO2 in the surface concrete is estimated to be absorbed and fixed in 2-4 years after the construction.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"コンクリート構造物の中性化の時期や速度の推定を行うため，昭和40年代に建築された実構造物のコア試験体の14C濃度, δ13CPDB値, δ18OSMOW値, CO2濃度の深度変化を調べた. CO2含有量は，最表層部で9%と最も高く，深部に向かって減少し，中性化がほとんど進んでいない深部では1%であった. 最表層部の14C濃度は139-148pMCであり，深部に向かって減少し，深部では71-86pMCであった. これらの深度プロファイルから以下の結論が得られた.(1)14C, δ13PDB, δ18OSMOWデータから, コア試験体深部のCO2は建築時に初生的に取り込まれたものであり，材料であるセメント由来のCO2(主に海洋石灰岩起源)とセメント製造時からコンクリート硬化後1ヶ月くらいの間にコンクリート全体に初生的に固定されたCO2(1967年の大気起源)の2成分の混合物であることが明らかとなった. (2)コア試験体の表層1cm部分のCO2について，建築時にコンクリート全体に初生的に含まれたCO2を補正し，建築後に吸収されたCO2の量と14C値を求めた.大気CO2の14C濃度の経年変動データを参照することにより，この14Cの補正値から中性化時期を推定したところ，表層部の中性化は建築後2-4年の間に進行していたことが明らかになった.","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_9_description_5":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"第23回名古屋大学年代測定総合研究センターシンポジウム平成22(2010)年度報告","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_9_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.18999/sumrua.22.140","subitem_identifier_reg_type":"JaLC"}]},"item_9_publisher_32":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"名古屋大学年代測定資料研究センター","subitem_publisher_language":"ja"}]},"item_9_select_15":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"淺原, 良浩","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"83272","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"南, 雅代","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"83273","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"丸山, 一平","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"83274","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"吉田, 英一","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"83275","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Asahara, Yoshihiro","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"83276","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Minami, Masayo","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"83277","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Maruyama, Ippei","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"83278","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshida, Hidekazu","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"83279","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-02-20"}],"displaytype":"detail","filename":"asahara2010.pdf","filesize":[{"value":"6.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"asahara2010.pdf","objectType":"fulltext","url":"https://nagoya.repo.nii.ac.jp/record/14609/files/asahara2010.pdf"},"version_id":"9de1f3bb-eebf-4062-b4da-730f90668f6f"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"radiocarbon","subitem_subject_scheme":"Other"},{"subitem_subject":"13C","subitem_subject_scheme":"Other"},{"subitem_subject":"18O","subitem_subject_scheme":"Other"},{"subitem_subject":"concrete","subitem_subject_scheme":"Other"},{"subitem_subject":"carbonation","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"炭素・酸素同位体分析による実構造物中のコンクリートの中性化進行評価","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"炭素・酸素同位体分析による実構造物中のコンクリートの中性化進行評価","subitem_title_language":"ja"}]},"item_type_id":"9","owner":"1","path":["1395"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2012-06-05"},"publish_date":"2012-06-05","publish_status":"0","recid":"14609","relation_version_is_last":true,"title":["炭素・酸素同位体分析による実構造物中のコンクリートの中性化進行評価"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-01-16T04:01:59.448663+00:00"}