Which factor is not typically considered when selecting the slump range for transit concrete?

Which factor is not typically considered when selecting the slump range for transit concrete?

• A. Color of the concrete.
• B. Transport method (pump vs direct discharge).
• C. Truck color.
• D. Ambient temperature.

Answer: (C)

Workability and placement during transit drive how the slump range is chosen. The slump needs to be appropriate for how the concrete will be moved and placed—pumpability or direct discharge, and how far and through what conduits it must travel. It also depends on environmental conditions, especially ambient temperature, because hotter weather can cause faster slump loss and quicker setting, affecting how the concrete can be worked at the site. The color of the truck is unrelated to the concrete’s flow or workability, so it doesn’t factor into selecting the slump range. Similarly, while the concrete might be tinted for cosmetic reasons, that color does not determine its viscosity or the ease of placement.

Workability and placement during transit drive how the slump range is chosen. The slump needs to be appropriate for how the concrete will be moved and placed—pumpability or direct discharge, and how far and through what conduits it must travel. It also depends on environmental conditions, especially ambient temperature, because hotter weather can cause faster slump loss and quicker setting, affecting how the concrete can be worked at the site.

The color of the truck is unrelated to the concrete’s flow or workability, so it doesn’t factor into selecting the slump range. Similarly, while the concrete might be tinted for cosmetic reasons, that color does not determine its viscosity or the ease of placement.