During transit, which observation would indicate potential quality issues requiring action before placement continues?

• A. Uniform color
• B. Segregation visible in the drum
• C. Fresh smell
• D. Normal temperature

Answer: (B)

The essential point is that a uniform mix during transit is crucial for consistent performance once placed. Segregation in the drum—where the paste separates from the aggregates or heavier components settle out—indicates the concrete is no longer uniform. This creates weak spots, variable workability, and unpredictable strength and durability in the finished surface. Because these issues reflect the batch’s integrity, you must take action before placement continues: stop and remix or otherwise remedy the mix so the load is uniform again. Other observations like uniform color, fresh smell, or normal temperature don’t inherently signal a quality problem that requires stopping the placement.