On the Strength Parameter and Soil Classification of Kuroboku-Shirasu Mixed Soil

Abstract

This report contains the explanation of results of the triaxial compression test on the-Kuroboku-Shirasu mixed soil classified from organic soil to inorganic one. For using the Kuroboku Soil as a mixing material, the change of strength parameters accompanied with the mechanical variation of the organic matter content is discussed.
The mixed soil has the cohesion and angle of internal friction similar to the organic soil when the organic matter content is above 13 percent. On the other hand, in case that the content is below 5 percent, the mixed soil comes to have strength parameters similar to the Shirasu (volcanic sandy soil). The intermediate property is shown in the range of the content from 5 to 13percent.