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This paper introduces non-destructive in-situ air permeability test methods for “covercrete” mainly based on the draft version of state-of-the-art-report prepared by RILEM TC 189-NEC “Non-destructive methods to measure air-permeability”. The scope of the TC includes (a) Selection of suitable non-destructive test (NDT) methods for the evaluation of the thickness and quality of the covercrete, in view of the durability of concrete structures, (b) Draft recommendations for the application of those test methods, (c) Establish guidelines for the specification of the quality and thickness of the concrete cover, as function of exposure conditions and service life design, and for its compliance control in-situ by NDT methods. In this paper, an outline of the comparative test to achieve the scope “(a)” is also introduced."},{"@language":"ja","@value":"外的な劣化因子に対するコンクリート構造物の耐久性は, かぶり (厚さ) だけでなく, その緻密度にも大きく依存する。本稿は実構造物の表層 (かぶりコンクリート) 透気性の原位置試験方法に関する研究の現状を, RIL EMTC 189-NECのstate- of- the- art- reportを中心に紹介するものである。このTCは, a) 耐久性の観点から見たかぶりコンクリートの厚さ・品質の非破壊試験方法の選定, b) 推奨される試験方法案の作成, c) 構造物のおかれる環境条件と供用期間を考慮したかぶりコンクリートの仕様と非破壊試験適用指針の作成を視野に入れて活動している。本稿では, 同TCで実施された共通試験の概要にっいても紹介する。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801199351168","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60337300"},{"@type":"NRID","@value":"1000060337300"},{"@type":"NRID","@value":"9000400396244"},{"@type":"NRID","@value":"9000003836977"},{"@type":"NRID","@value":"9000019197741"},{"@type":"NRID","@value":"9000400454409"},{"@type":"NRID","@value":"9000045432704"},{"@type":"NRID","@value":"9000241714599"},{"@type":"NRID","@value":"9000400407557"},{"@type":"NRID","@value":"9000401326023"},{"@type":"NRID","@value":"9000401248141"},{"@type":"NRID","@value":"9000401225462"},{"@type":"NRID","@value":"9000401194220"},{"@type":"NRID","@value":"9000401409968"},{"@type":"NRID","@value":"9000403540775"},{"@type":"NRID","@value":"9000401262773"},{"@type":"NRID","@value":"9000283152044"},{"@type":"NRID","@value":"9000258398892"},{"@type":"NRID","@value":"9000010179176"},{"@type":"NRID","@value":"9000342454011"},{"@type":"NRID","@value":"9000409210651"},{"@type":"NRID","@value":"9000400395731"},{"@type":"NRID","@value":"9000400613549"},{"@type":"NRID","@value":"9000400410756"},{"@type":"NRID","@value":"9000400215951"},{"@type":"NRID","@value":"9000400405077"},{"@type":"NRID","@value":"9000315162504"},{"@type":"NRID","@value":"9000272636008"},{"@type":"NRID","@value":"9000400455865"},{"@type":"NRID","@value":"9000400641835"},{"@type":"NRID","@value":"9000400641518"},{"@type":"NRID","@value":"9000400641659"},{"@type":"NRID","@value":"9000237761826"},{"@type":"NRID","@value":"9000391666640"},{"@type":"NRID","@value":"9000322100266"},{"@type":"NRID","@value":"9000401196733"},{"@type":"NRID","@value":"9000401194131"},{"@type":"NRID","@value":"9000401385613"},{"@type":"NRID","@value":"9000401411043"},{"@type":"NRID","@value":"9000401411491"},{"@type":"NRID","@value":"9000403542922"},{"@type":"NRID","@value":"9000403540695"},{"@type":"NRID","@value":"9000400440911"},{"@type":"NRID","@value":"9000400440721"},{"@type":"NRID","@value":"9000283151781"},{"@type":"NRID","@value":"9000010660328"},{"@type":"NRID","@value":"9000402487838"},{"@type":"NRID","@value":"9000400396245"},{"@type":"NRID","@value":"9000400371917"},{"@type":"NRID","@value":"9000400411243"},{"@type":"NRID","@value":"9000400503133"},{"@type":"NRID","@value":"9000400455459"},{"@type":"NRID","@value":"9000400928147"},{"@type":"NRID","@value":"9000400407914"},{"@type":"NRID","@value":"9000400640586"},{"@type":"NRID","@value":"9000400401494"},{"@type":"NRID","@value":"9000284632717"},{"@type":"NRID","@value":"9000005443317"},{"@type":"NRID","@value":"9000315163193"},{"@type":"NRID","@value":"9000390879397"},{"@type":"NRID","@value":"9000391835496"},{"@type":"NRID","@value":"9000391834816"},{"@type":"NRID","@value":"9000326652792"},{"@type":"NRID","@value":"9000401157845"},{"@type":"NRID","@value":"9000403540901"},{"@type":"NRID","@value":"9000403540856"},{"@type":"NRID","@value":"9000403541270"},{"@type":"NRID","@value":"9000400440700"},{"@type":"NRID","@value":"9000258068872"},{"@type":"NRID","@value":"9000258070433"},{"@type":"NRID","@value":"9000400396565"},{"@type":"NRID","@value":"9000400614130"},{"@type":"NRID","@value":"9000400411501"},{"@type":"NRID","@value":"9000400215177"},{"@type":"NRID","@value":"9000400630711"},{"@type":"NRID","@value":"9000400638813"},{"@type":"NRID","@value":"9000400642798"},{"@type":"NRID","@value":"9000315162822"},{"@type":"NRID","@value":"9000400407909"},{"@type":"NRID","@value":"9000400641234"},{"@type":"NRID","@value":"9000400403206"},{"@type":"NRID","@value":"9000401345114"},{"@type":"NRID","@value":"9000391835438"},{"@type":"NRID","@value":"9000401329725"},{"@type":"NRID","@value":"9000401196727"},{"@type":"NRID","@value":"9000401196761"},{"@type":"NRID","@value":"9000401194138"},{"@type":"NRID","@value":"9000403541658"},{"@type":"NRID","@value":"9000400392885"},{"@type":"NRID","@value":"9000400406640"},{"@type":"NRID","@value":"9000400130071"},{"@type":"NRID","@value":"9000315163267"},{"@type":"NRID","@value":"9000363883999"},{"@type":"NRID","@value":"9000391833501"},{"@type":"NRID","@value":"9000314381615"},{"@type":"NRID","@value":"9000305641162"},{"@type":"NRID","@value":"9000300214225"},{"@type":"NRID","@value":"9000401196619"},{"@type":"NRID","@value":"9000401196681"},{"@type":"NRID","@value":"9000401193871"},{"@type":"NRID","@value":"9000401411049"},{"@type":"NRID","@value":"9000401411389"},{"@type":"NRID","@value":"9000403540864"},{"@type":"NRID","@value":"9000403541713"},{"@type":"NRID","@value":"9000400440843"},{"@type":"NRID","@value":"9000399331166"},{"@type":"NRID","@value":"9000283099659"},{"@type":"NRID","@value":"9000359880296"},{"@type":"NRID","@value":"9000400410762"},{"@type":"NRID","@value":"9000315162694"},{"@type":"NRID","@value":"9000347295963"},{"@type":"NRID","@value":"9000345430831"},{"@type":"NRID","@value":"9000401196720"},{"@type":"NRID","@value":"9000401385625"},{"@type":"NRID","@value":"90004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