Chemical and physical properties, and compaction characteristics of weathered soil of Sangun metamorphic rock in Yamaguchi prefecture

Sangun metamorphic rock is widely distributed in Yamaguchi prefecture. Slopes consisting of the weathered soil of Sangun metamorphic rock with schistosity, frequently failed during heavy rainfalls. Therefore the weathered soils may be regarded as one of problematic soils. Chemical and physical properties of 15 samples were examined using a X-ray fluorescence spectrometer and some soil test apparatuses, respectively. Furthermore compaction test were performed on the samples. The tests showed that compaction index had a good correlation to SiO_2,Fe_2O_3 contents.