{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679358964352.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.11315/jsde1991.7.40"}},{"identifier":{"@type":"NAID","@value":"130004370406"}}],"dc:title":[{"@language":"en","@value":"Concrete Placing during Freezing Weather for Repair of Miura Dam's Intake Tower"},{"@value":"三浦ダムの取水塔に対する寒中コンクリートを用いた補修工事"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Concrete placing was carried out during freezing weather in winter at the Miura dam to repair its intake tower, which had produced visible degradation in concrete after 70 years of service. The facility, located in mountainous terrain in central Japan and used exclusively for electric power generation, performs its flow-regulating duty throughout the year and, thus, there were restrictions on the method and timing of repair work to minimize adverse impact on power generation. The work was executed in winter when freezing weather prevails but the level of water in the reservoir remains relatively low. Lithium nitrite was used as an admixture in concrete in a bid to compensate for lack of sufficient curing time and to prevent initial frost damage. It was confirmed that the quality of concrete can be assured by adding lithium nitrite without the need for providing any special curing process, such as thermal insulation or heating."},{"@value":"三浦ダムの取水塔は, 寒冷地に位置しているうえ, 建設後約70年経過したので, 凍害劣化により損傷が顕著となり, 補修の必要が生じた。同ダムは, 年間を通じて流況調整する発電専用ダムであるので, 施工にあたっては工程, 工法に制約を受け, 厳寒期に十分な養生設備を設けることなく施工するとともに初期凍害を防止する必要があった。このため, 亜硝酸リチウムを防凍性混和剤として使用し, 特別の保温加熱等をすることなく, コンクリートの所定の品質を確保できることを確認した。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410853646929917313","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000256716232"}],"foaf:name":[{"@language":"en","@value":"MIYATA Shuuji"},{"@language":"ja","@value":"宮田 修司"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"関西電力 (株) 東海支社木曽電力所補修課"}]},{"@id":"https://cir.nii.ac.jp/crid/1410853646929917312","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000256716233"}],"foaf:name":[{"@language":"en","@value":"TODO Katsuya"},{"@language":"ja","@value":"藤堂 勝也"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"関西電力 (株) 総合技術研究所構築研究室"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"09173145"},{"@type":"EISSN","@value":"18808220"}],"prism:publicationName":[{"@language":"en","@value":"Journal of Japan Society of Dam Engineers"},{"@language":"ja","@value":"ダム工学"},{"@language":"en","@value":"Damu Kogaku"},{"@language":"ja","@value":"ダム工学"},{"@language":"en","@value":"Journal of Japan Society of Dam Engineers"}],"dc:publisher":[{"@language":"en","@value":"Japan Society of Dam Engineers"},{"@language":"ja","@value":"一般社団法人 ダム工学会"}],"prism:publicationDate":"1997","prism:volume":"7","prism:number":"1","prism:startingPage":"40","prism:endingPage":"48"},"availableAt":"1997","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=compressive%20strength","dc:title":"compressive strength"},{"@id":"https://cir.nii.ac.jp/all?q=cold%20weather%20concrete","dc:title":"cold weather concrete"},{"@id":"https://cir.nii.ac.jp/all?q=chemical%20admixture","dc:title":"chemical admixture"},{"@id":"https://cir.nii.ac.jp/all?q=intake%20tower","dc:title":"intake tower"},{"@id":"https://cir.nii.ac.jp/all?q=dam","dc:title":"dam"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%9C%A7%E7%B8%AE%E5%BC%B7%E5%BA%A6","dc:title":"圧縮強度"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%AF%92%E4%B8%AD%E3%82%B3%E3%83%B3%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%88","dc:title":"寒中コンクリート"},{"@id":"https://cir.nii.ac.jp/all?q=%E6%B7%B7%E5%92%8C%E5%89%A4","dc:title":"混和剤"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%8F%96%E6%B0%B4%E5%A1%94","dc:title":"取水塔"},{"@id":"https://cir.nii.ac.jp/all?q=%E3%83%80%E3%83%A0","dc:title":"ダム"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390293180202111360","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A STUDY ON FUNDAMENTAL PROPERTIES OF ANTI-FREEZING PC GROUT USING LITHIUM NITRITE AND ITS PRACTICALITY"},{"@language":"ja","@value":"亜硝酸リチウムを添加した耐寒PCグラウトの基礎物性とその実用性の検討"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0038961078"},{"@type":"CIA","@value":"130004370406"},{"@type":"CROSSREF","@value":"10.2208/jscejmcs.78.3_210_references_DOI_DV9zJ7fZ2LzSEgHkWcIjT0jeIfj"}]}