１０年以上経過した超高層建物のシーリング材の劣化調査

髙橋 愛枝^＊１・永井 香織^＊１・市原 英樹^＊１・山宮 輝夫^＊２・安 伸二^＊３

近年，超高層建物の大規模改修工事が増加している。しかし，超高層建物の劣化調査の報告が少ないため，各種仕上材の劣化現象の建物高さの影響は把握されていない。本調査は，超高層建物外装の劣化状況の把握を目的に，各種仕上材の中でも比較的耐用年数の少ないシーリング材に着目し，10年以上経過した超高層建物を目視調査および物性試験によって劣化調査を行った結果についてまとめたものである。調査結果から，高さによる劣化は，高層階のほうが進行していることが確認された。方位による劣化は，南面が最も進んでいた。

＊１ 技術センター 建築技術研究所 建築構工法研究室
＊２ 建築本部 技術部
＊３ 建築研究開発コンソーシアム

Investigation of Aged Sealants in High-rise Buildings Constructed more than Ten Years Ago

Yoshie TAKAHASHI^*1, Kaori NAGAI^*1, Hideki ICHIHARA^*1, Teruo YAMAMIYA^*2 and Shinji YASU^*3

Large-scale repairs of high-rise buildings recently has been increasing. Few high-rise buildings have been investigated for deterioration, however, so the relationship between the height of the building and the degradation of various finishing materials is not well understood. This investigation examined how the exteriors of high-rise buildings deteriorate, paying particular attention to the aging of the sealing materials. High-rise buildings built more than ten years ago were visually investigated for deterioration and subjected to physical tests. As for the relationship of the degree of deterioration to the height of the building, the study confirmed that deterioration progressed to a multistory floor. The southern exposure showed the most deterioration.

*1 Building System and Material Research Section, Building Engineering Research Institute, Technology Cente
*2 Technology Promotion Department, Building Construction Division
*3 Consortium for Building Research & Development

15 - REPORT OF TAISEI TECHNOLOGY CENTER No.43 2010