粉粒体の水中沈積物の機械的性質について

Abstract

In the previous reports it was shown that the structure of sediments of solid particles in water depends upon bonding force at the contact points of particles and the bonding force consists ofadhesion and friction.In this report the relations between rheological properties and structure of sediment are described.As solid particles in water are enveloped by thin hydrated layer, the sediment is not fixed at contact points of particles but the particles can mutually be rotated and moved.The rheological properties depend on only a bonding force. The sediment is called “quasi-solid” by Rehbinder, while the agglomerate such as concrete or pellet is fixed at contact points of particles, so the rheological properties depend on both the strengthof solid and the bonding force at contact points. These agglomerate is regarded as true solid.Generally the rheological properties of solid particles settled in water shows structural viscosity and viscosity decreases on increasing shear rate.