Question

When pumping concrete into tightly reinforced forms, which of the following should be used?

1) Superplasticizers
2) Lower concrete to water ratio
3) Air Entrainment
4) Fly Ash

Answer 1

Superplasticizers and lowering the concrete to water ratio should be used when pumping concrete into tightly reinforced forms.

Step-by-step explanation:

When pumping concrete into tightly reinforced forms, it is recommended to use superplasticizers and lower the concrete to water ratio. Superplasticizers are chemical additives that improve the workability and flow of concrete, making it easier to pump into complex forms. Lowering the concrete to water ratio also improves the pumpability of the concrete by reducing its viscosity and making it easier to flow through the hose.