Abstract
The diaphragm wall is a rectangular reinforced wall for preventing landslide and water leak by enclosing the underground. In order to analyze the flow offresh concrete placing in diaphragm wall, a new technique was discussed in this paper. In this study, a model cocnrete was developed and used to simulate actual fresh concrete placing in diaphragm wall. Then, visualization technique enabled the rising velosity of the surface of the model concrete within diaphragm wall to be determined. The model concrete was made of water added to super absobent polymer and viscosity agent, where there was no aggregate mixed. The yield value and the plastic viscosity of the model cocnrete were varied to study effects of these characteristics on its rising velosity. The consistency of the model concrete was adjusted with the additive amount of the polymer and the viscosity agent.
As a result of this study, it was found that the rising velosity of the surface of the model concrete placing in diaphragm wall was influenced more considerably by the plastic viscosity than the yield value.
