日本と海外の海成粘性土の物理・化学的特性に関する相違点(<小特集>粘土の物理・化学)

概要

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his paper compares the chemical and physical properties of Japanese and non-Japanese marine clays. As non-Japanese clays, soil samples were recovered from Dram-men (Norway), Bothkennar (UK), Singapore, Bangkok (Thailand), Pusan (Korea) and Louiseville (Canada). Cation exchange capacity (CEO and specific surface area (SSA) were measured and correlated with Plasticity Index (I_p) for these clays. It was revealed from the observation of Scanning Electron Microscope (SEM) that Japanese soils contain a large proportion of micro fossils, especially diatoms. Using artificial clay mixture of diatom, the influences of diatom on physical as well as mechanical properties were studied. It is anticipated that peculiarities of Japanese clay (such as large activity, large strength parameters and low density of solid particles) might have been caused by the diatom and other microfossils present in them.
社団法人地盤工学会の論文
2001-02-01