Summary
Decomposed granite soils are widely distributed in the south-western part of Japan. One of their characteristics is the easy crushing of soil grains, which is an important factor in the study of their engineering properties. In this paper, the authors observe the weathering properties of soil grains using an electron microscope, and explain the difference between the weathering patterns of quartz and feldspar. In addition, they examine experimentally the grain fracture which is dependant on weathering patterns, and present a concept of selective fracture of soil grains.
Résumé
Le sol de granit décomposé est très répandu dans les régions sud-ouest du Japon. Il se caractérise notamment par la fragilité de ses grains, ce qui est important dans les recherches sur les propriétés industrielles de ce sol. Dans le texte, nous traitons des propriétés de désagrégation des grains de ce sol, observées par microscopie électronique. Nous proposons aussi une explication de la différence entre les processus de désagrégation climatique du quartz et du feldspath. En plus, on trouvra ici un concept de fracture des grains du sol, obtenu par l’examination experimantale de la fracture sélective qui se produit sous l’influence de ces types de désagrégation.
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References
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Shin-ichiro, M., Kouhei, S. Studies of the crushability of decomposed granite soil grains. Bulletin of the International Association of Engineering Geology 11, 71–76 (1975). https://doi.org/10.1007/BF02635457
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DOI: https://doi.org/10.1007/BF02635457