エコーチップ硬さ試験機による青島砂岩の表面風化層の強度把握  [in Japanese] Evaluation of Strength Reduction of Weathered Aoshima Sandstone Using an Equotip Rebound Hardness Tester  [in Japanese]

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Author(s)

    • 青木 久 AOKI Hisashi
    • 筑波大学大学院・生命環境科学研究科 Graduate School of Life and Environmental Sciences, University of Tsukuba
    • 松倉 公憲 MATSUKURA Yukinori
    • 筑波大学・生命環境科学研究科・地球環境科学専攻 Geoenvironmental Sciences, Graduate School of Life and Environmental Sciences, University of Tsukuba

Abstract

Tafoni-like depressions have occurred on the Aoshima sandstone blocks used for a masonry bridge pier in the coastal spray zone. A thin layer of granular disintegration was found on the surface in depressions. To evaluate quantitatively strength of the thin weathered layer, the hardness was measured at the surface of the sandstone blocks using both an Equotip hardness tester and an L-type Schmidt hammer. Comparison of both testing results indicates that the Equotip rebound value is more sensitive to evaluate the strength of a thin layer of weathered rock surface than the Schmidt hardness value. This suggests that the measurement by Equotip testing is effective for the estimation for the degree of the strength reduction due to weathering.

Journal

  • Transactions,Japanese Geomorphological Union

    Transactions,Japanese Geomorphological Union 25(4), 371-382, 2004-10-25

    日本地形学連合

References:  40

Cited by:  3

Codes

  • NII Article ID (NAID)
    110001269728
  • NII NACSIS-CAT ID (NCID)
    AN00333248
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03891755
  • NDL Article ID
    7140837
  • NDL Source Classification
    ZM49(科学技術--地球科学--地質)
  • NDL Call No.
    Z15-386
  • Data Source
    CJP  CJPref  NDL  NII-ELS  NDL-Digital 
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