Final answer:
The appropriate slump for a driveway or sidewalk concrete mix typically ranges from 3-4 inches, balancing workability and stability for the mixture to be easily placed and finished.
Step-by-step explanation:
The slump test measures concrete's workability and consistency. For a typical driveway or sidewalk mix, the slump should generally be between 3-4 inches. This ensures the mix is workable enough to be placed and finished, but not so wet that it will cause issues like segregation or excessive shrinkage.
The 'rule of thumb' mentioned is likely referring to reinforcement practices and not directly related to concrete slump. Concrete pumping details provided in your question involve advanced physics and engineering concepts such as calculating the resistance of a hose, determining the viscosity of a concrete mixture assuming laminar flow, and measuring the power required to pump concrete. These calculations are based on flow rates, hose dimensions, pressure, viscosity, and density.