金, 原台

玉津, 智広

Mozammel, Hoque M.

阿部, 勢子

高橋, 悟

Kim, Wontae

Tamatsu, Tomohiro

Abe, Seiko

Takahashi, Satoru

This study was conducted to obtain fundamental data which, in turn, be used for the improvement of hedoro soil (muddy sediment), widely existed in lowlands of Japan. Previously, in the first report, the physical properties of four kinds of hedoro soil were reported. Here in this paper, we present the physical properties of three kinds of hedoro soil. They are Haneda hedoro soil (H) existing under seawater, Matsue hedoro soil (M) existing under brackish water and Kasumigaura hedoro soil (K) existing under pure water. We also investigated changes of the properties during drying process in Haneda hedoro soil. The results obtained were summarized as follows; 1. It was observed that the liquid limits (LL) and plastic limits (PL) of Kasumigaura were the highest among the three different hedoro soils. The LL and PL were influenced by ignition loss to a considerable degree. 2. In the Haneda hedoro soils hydraulic conductivity decreased gradually against the increase of dry density with the exception that in stage 3 (pF3.6) a reverse trend was observed. That was probably because of appearing cracks. 3. The compaction curve hysteresis of hedoro soil was appeared as similar to the volcanic ash soil that is rich in clay. 4. The drying process caused an irreversible effect on the measurement regarding consistency, water retentivity, hydraulic conductivity and compaction of hedoro soil.