石造文化財に使用されている溶結凝灰岩の初期風化の化学指標

• 姜 開君

  九州大学大学院

• 渡辺 公一郎

  九州大学工学部

• 江崎 哲郎

書誌事項

タイトル別名

• Chemical Indices of the Initial Weathering of Welded Tuff Used in Lithic Cultural Heritage.
• セキゾウ ブンカザイ ニ シヨウサレテ イル ヨウケツ ギョウカイガン ノ シ

抄録

The conservation of lithic cultural heritages has recently drawn more attention worldwide. This paper presents a case study on a 150-year-old historically famous stone bridge called Takeno bridge in Kagoshima City, southwestern Japan. Weathering processes in the vicinity of the contact surface of the arch stone, consisting of welded tuff, were assessed by mineralogical and geochemical methods. It shows that during the 150 years, the chemical weathering advanced in the forms of hydration and oxidation even though the major mineral phases and the relative amounts generally have not been changed, and the leaching of the major elements out of the weathered rock has not occurred. The titanomagnetite has been oxidized to maghemite to some extent, especially at the contact surface the oxidation degree is relatively high. The weathering degree near the contact surface is about 15% and the affected depth is about 10 cm from the contact surface. By comparing with engineering properties, it turns out that the ignition loss test and magnetic susceptibility test are effective methods to evaluate the initial weathering of building stones. The hydration and oxidation would be the chemical reasons for deterioration near the contact surface of the arch stone.

収録刊行物

• 応用地質

  応用地質 38 (4), 205-212, 1997

  一般社団法人 日本応用地質学会

キーワード

• 石造文化財
• 初期風化
• 石橋

詳細情報

• CRID: 1390001204096062976
• NII論文ID: 110003335089
• NII論文ID: 10003415352
• NII書誌ID: AN00026635
• DOI: 10.5110/jjseg.38.205
• ISSN: 18840973
• ISSN: 02867737
• NDL書誌ID: 4313360
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4313360
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可