In the conveying of most building concrete from the mixer or truck to the form is done in bottom-dump buckets, then the chief danger during conveying is that of
- ATransferring
- BMoisture and temperature
- CSegregationCorrect
- DVibrations
Solution
Concept
Segregation during handling
Step-by-step solution
1. Dropping or discharging concrete from a bottom-dump bucket can separate the coarse aggregate from the mortar.
Explanation
Segregation, the separation of the ingredients, is the chief risk when concrete is conveyed and discharged from heights.
Why the other options are wrong
Transfer, moisture and temperature, and vibration are less critical for bucket conveying.
Shortcut
Free fall → segregation.
Correct answer: C) Segregation