Influence of Compositional and Textural Changes by Weathering on Breakdown Property of Rocks

• KASHIWAYA Kouki

  Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University

• YONEDA Tetsuro

  Resources and Geoenvironmental Engineering, Graduate School of Engineering, Hokkaido University

• HAYASHI Kenji

  Geotechnos Co., Ltd.

• P.DHAKAL Ganesh

  AB Consultants Inc., USA

Bibliographic Information

Other Title

• 露天資源開発の現状と新たな展開を支える技術　　風化による組成と組織の変化が岩石の破壊特性に及ぼす影響
• 風化による組成と組織の変化が岩石の破壊特性に及ぼす影響
• フウカ ニ ヨル ソセイ ト ソシキ ノ ヘンカ ガ ガンセキ ノ ハカイ トクセイ ニ オヨボス エイキョウ

Abstract

Influence of compositional and textural changes by weathering on breakdown property of rocks was considered through two cases.<BR>First case is the slaking property change of Poronai siltstone by preceding deteriorations such as weathering alteration and shear by landslide. The altered sample, where increase in smectite was observed, showed accelerating slaking behavior. In contrast, the sample, that was fractured by landslide but not altered, showed drastic slaking in the early stage of the slaking test and then approached to the behavior of intact sample.<BR>Second case is the influence of weathering on breakdown behavior in uniaxial compressive test. Samples are Inada granite and Kuroishiyama gabbro. In their weathered samples, fractures occurred by weathering were observed and their distributions had close relationships with the composition and texture of the plutonic rocks. Breakdown behaviors in the uniaxial compression were affected by the fractures developed through weathering.<BR>In these two cases, the breakdown behaviors are considered to relate with compositional and textural changes occurred by weathering, and it indicates that grasping about compositional and textural change is essential for understanding and prediction of physical property variation in weathering environment.

Journal

• Shigen-to-Sozai

  Shigen-to-Sozai 122 (12), 596-600, 2006

  The Mining and Materials Processing Institute of Japan

Keywords

• Weathering
• Composition
• Texture
• Slaking
• Uniaxial Compressive Test
• Fracture

Details

• CRID: 1390001206049784576
• NII Article ID: 10018661316
• NII Book ID: AN10062646
• DOI: 10.2473/shigentosozai.122.596
• COI: 1:CAS:528:DC%2BD2sXhvVGksbs%3D
• ISSN: 18806244
• ISSN: 09161740
• NDL BIB ID: 8628106
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8628106
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed