11.2. Parameters

Try these first

1. 1.

   What is yield stress?

   Hint

   Think of what it takes to get the concrete moving.

2. 2.

   Define plastic viscosity.

   Hint

   Consider how thick or thin the concrete feels.

3. 3.

   What is needed to initiate flow in fresh concrete?

   • Plastic Viscosity
   • Yield Stress
   • Thixotropy

   Hint

   It's like the energy needed to start an engine.

4. 4.

   True or False: A high plastic viscosity is desired in fresh concrete.

   • True
   • False

   Hint

   Think about how viscosity impacts flow.

5. 5.

   Given the yield stress and viscosity values of two concrete mixes, analyze which mix would perform better for a high-rise building project.

   Hint

   Consider how each parameter affects handling and curing.

6. 6.

   Design a concrete mix that utilizes thixotropic properties effectively for a complex formwork scenario.

   Hint

   Look at how thixotropy influences flow and stability for complex shapes.