Study on the utilization and application of hedoro soil, 2: Drying properties of hedoro soil
1998
Yabashi, S. (Chiba Univ., Matsudo (Japan). Faculty of Horticulture) | Kim, W. | Tamatsu, T. | Mozammel, H.M. | Abe, S. | Takahashi, S.
This study was conducted to obtain fundamental data which, in turn, be used for the improvement of hedero 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 using 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 in rich in clay. 4) The drying process caused an irreversible effect on the measurement regarding consistency, were retentivity, hydraulic conductivity and compaction of hedoro soil
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