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Basic friction angles of carbonate rocks from Kananaskis country, Canada

Mesure des angles de frottement de roches carbonatées du pays de Kananaskis, Canada

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Abstract

Basic friction angles of the Paleozoic carbonate rocks of Kananaskis Country, west of Calgary, Canada were determined on a tilting table to range from 21.5o to 41.3o. The basic friction angles of carbonate rocks with impurity contents under 10% increase with calcite content and grain size. Clay minerals reduce basic friction angles in carbonate rocks with impurity contents over 10%. Sliding angles from repeated tests decrease with displacements for dolostones but not for limestones. The friction angles of highly polished surfaces are 7.5 to 7.9o for dolostones and 11.8 to 13.0o for limestones, a difference attributed to the frictional properties of the minerals.

Résumé

On a mesuré les angles de frottement des roches Paléozoiques carbonatées dans le pays de Kananaskis, à l'ouest de Calgary, au Canada sur une table inclinée dans un intervalle de 21.5 à 41.3o. Les angles de frottement des roches carbonatées qui contiennent moins de 10% d'impuretés, augmentent en fonction de la teneur en calcite et de la dimension des grains. Les minéraux argileux, en lubrifiant les surfaces de glissement, réduisent les angles de frottement des roches carbonatées qui contiennent plus de 10% d'impuretés. En faisant des essais successives, les angles de glissement des dolomies diminuent en fonction des déplacements, ce qui n'est pas le cas pour les calcaires. Les angles de frottement des surfaces extrêmement lisses sont de 7.5 à 7.9o pour les dolomies et de 11.8 à 13.0o pour les calcaires. On attribue cette différence aux caractéristiques de surface des minéraux.

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Authors and Affiliations

  1. Department of Civil Engineering and Geology, University of Alberta, T6G 2G7, Edmonton, Alberta, Canada

    D. M. Cruden

  2. Department of Geology, University of Alberta, T6G 2E3, Edmonton, Alberta, Canada

    X. Q. Hu

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  1. D. M. Cruden
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  2. X. Q. Hu
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Cruden, D.M., Hu, X.Q. Basic friction angles of carbonate rocks from Kananaskis country, Canada. Bulletin of the International Association of Engineering Geology 38, 55–59 (1988). https://doi.org/10.1007/BF02590448

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