ICAR Rheometer - Fresh Concrete Yield Stress

The ICAR Rheometer is designed to characterize the static yield stress, the dynamic yield stress and plastic viscosity of the concrete.
A high static yield stress is desirable because it reduces formwork pressure and increases the resistance to segregation. But for ease of pumping, placement, and self consolidation, a low dynamic yield stress is necessary.
The dynamic viscosity provides cohesiveness and contributes to reducing segregation when concrete is flowing. The schematic plot to the right shows dynamic flow curves for conventional concrete and different types of self-consolidating concrete (SCC) mixtures.