Florida DOT Concrete Batchman/Operator Practice Exam

If a load of concrete has been rejected due to excessive slump, what is the protocol regarding the concrete's presence in the transporting vehicle?

1. The concrete may remain in the vehicle to reduce the slump

2. The concrete must be recycled immediately

3. The concrete can only be worked on outside the vehicle

4. The concrete is not allowed to remain in the vehicle

The correct answer is: The concrete is not allowed to remain in the vehicle

When concrete is rejected due to excessive slump, the protocol dictates that the concrete is not allowed to remain in the transporting vehicle. This is crucial for various reasons. Firstly, excessive slump indicates that the concrete mix contains too much water, which can significantly impact the strength and durability of the finished product. Keeping this concrete in the vehicle could result in further deterioration of its quality, as it may continue to lose consistency and workability over time. Secondly, from a safety and regulatory standpoint, there are guidelines that specify what to do with rejected concrete to ensure it does not compromise future work or the integrity of the project. By removing the concrete from the vehicle immediately, it ensures that any potential hazards associated with using a faulty mix are mitigated. Overall, immediate removal of the rejected concrete from the vehicle is essential to maintain quality control and adherence to construction standards. This ensures that any issue arising from the excessive slump is properly dealt with before it can affect further operations.