Ace the LADOTD PCC Plant Inspection 2026 – Ignite Your Engineering Success!

The maximum allowable number of revolutions for a truck mixer is an important specification in concrete production. The answer of 130 revolutions aligns with standards set for mixing concrete to ensure both quality and workability.

Truck mixers are designed to mix the concrete adequately before it is poured to prevent segregation and ensure a uniform mix. If the concrete is mixed too much—beyond the recommended limits—it can lead to a breakdown of the concrete’s components and adversely impact performance, workability, and the final strength of the mixture.

The limit of 130 revolutions allows sufficient mixing time while preventing over-mixing, ensuring that the integrity of the concrete is maintained up to the point of delivery. In practice, this guideline helps contractors and inspectors assess whether the concrete has been sufficiently mixed according to industry standards.