Masanori YAMADA

Examination on a Specific Gravity of Soil Particle as an Index for Hydration Reaction 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 take the unconfined compression, dispersion of unconfined compression strength is watched so that stress-strain curve and destruction forms are different by each specimen. It is caused by vertical water moisture content distribution of the specimen. Therefore, I payed attention to the hydration reaction that water and cement of the specimen set. In This study, I adopted specific gravity of soil particle as an index of hydration reaction. I carried out an unconfined compression examination and a density of soil particle examinations in each specimen of predetermined age, for the purpose of making quantification in degree of hydration by specific gravity of soil particle and making clear the relation between the hydration reaction and unconfined compression strength.
The following are the main results obtained in this study.
(1)In this study, I was able to do quantification of degree of hydration with specific gravity of soil particle of FCL.
(2)Unconfined compression strength almost shows proportional relation with degree of hydration.
(3)Because degree of hydration is constant inspite of vertical situation, it is presumed that stress of local flame is constant.