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Title
Japanese: 
English:Rapid Degradation of Concrete Anchorage Performance by Liquid Water 
Author
Japanese: 千々和 伸浩, MAI THI HONG, 岩波 光保, 齊藤 智久, 山谷 敦, 茂木 寛之, 篠崎 裕生.  
English: Nobuhiro Chijiwa, Hong Thi Mai, Mitsuyasu Iwanami, Tomohisa Saito, Atsushi Yamaya, Hiroyuki Motegi, Hiroo Shinozaki.  
Language English 
Journal/Book name
Japanese: 
English:Journal of Advanced Concrete Technology 
Volume, Number, Page Vol. 13    No. 10    pp. 438-448
Published date Oct. 20, 2015 
Publisher
Japanese: 
English:Japan Concrete Institute 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
File
Official URL https://www.jstage.jst.go.jp/article/jact/13/10/13_438/_article
 
DOI https://doi.org/10.3151/jact.13.438
Abstract Sludge ejection from the foundation of a wind turbine tower fixed by the anchor-ring method and the resulting sludge buildup have been confirmed to cause the undesirable phenomenon of lifting of the tower. Using specimen that is a pirtial model of the wind turbine foundation, this study investigates the influence of liquid water, differences in W/C, and differences in loading speed, to analyze developing factors on the concrete damage . The results shows that penetration of liquid water from rainfall and snowfall produces a wedge effect, breakdown of the concrete pore skeleton structure, grinding by sludge particle, cavitation and other effects, and leads to rapid deterioration of the anchorage performance of concrete foundation. Based on the knowledge on the deterioration process, rational countermeasures on design and maintenance are proposed.
Award ACT Three outstanding papers of 2015

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