Yoshiyuki TAMAO

Study on a Local Physical Characteristic of Foam Composite Light-weight Soil

Takaya KAINO

Now, we ordinarily use unconfined compression strength for the design and quality control of Foam Composite Light-weight Soil (abbr. FCL). However, when we make the unconfined compression test, the specimen of FCL shows different dynamical behavior and broken style from natural clayey soil. Therefore, it is difficult to evaluate accurate unconfined compression strength. As those cause I thought that the uniformity was lost inside the specimen, and that the weak part occurred. In this study, I carried out various examinations of physical and dynamical characteristic of the specimen, for the purpose of making clear the effect that the physical characteristic of hardened FCL specimens gave on the peculiar dynamical behavior and broken style of FCL.

The followings are the main results obtained in this study.
1. When the water content moisture becomes higher value in the lower part of the specimen, the local compressive break occurs.
2. It is able to become uniformly inside the specimen and to evaluate accurate unconfined compression strength of FCL by taking the specimen apart from the bottom of the container.