Journal of Advanced Concrete Technology
Online ISSN : 1347-3913
Scientific paper
Rapid Degradation of Concrete Anchorage Performance by Liquid Water
Nobuhiro ChijiwaThi Mai HongMitsuyasu IwanamiTomohisa SaitoAtsushi YamayaHiroyuki MotegiHiroo Shinozaki
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Volume 13 (2015) Issue 10 Pages 438-448

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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 model part 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.

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© 2015 by Japan Concrete Institute
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