On the Compaction Curve of the Kanto Loam and its Permeability 1

Abstract

The Kanto Loam (volcanic ash soil) has many physical characteristics, from which result particular engineering properties of the soil.
(1) The compaction curve of the Kantii Loam is also unusual, but its types can be expounded by several factors (shrinkage, expansion, lubricating action of water, rupture of soil particles etc.).
(2) The permeability decreases with decreasing of dry bulk density if the Kanto Loam is compacted in drying process. Therefore the sample compacted nearly at the natural moisture content has the lowest permeability notwithstanding small bulk density. This phenomenon can be explained, from the structual properties, that is the fact that there are no large pores and much non-free water.