2010 年 59 巻 1 号 p. 68-73
Recently, light weight soil made of dredged slurry with cement and air foam has been used for waterfront constructions. The characteristics of this material can be influenced by seawater when it is used in coastal areas. There is a risk that some air in the light weight soil may be replaced with water over time. These phenomena are affected by the absorption properties of the material. The purpose of this study is to evaluate absorption properties of light weight soil with air foam due to different mixing condition using an industrial X-ray CT scanner. In this paper, a series of absorption tests were conducted for specimens of 24 mixing conditions which were different quantity ratios of cement, water and air foam. And then, the CT scanning was also examined the process of absorption test for all specimens. Here, the density distribution change and water absorbed zones of the specimens were estimated by an X-ray CT data. And the absorption expansion velocities during absorption test of all specimens were obtained. According to these results, the effect of the mixing condition on the characteristics of absorption of light weight soil was evaluated. Especially, the absorption velocity of the light weight soil with air foam was influenced by the quantity ratios of cement and air foam.