The Vebe test measures how quickly fresh concrete flattens whilst being vibrated.
The testing apparatus consists of a hollow conical frustum placed in a larger hollow upright cylinder, a clear plastic disk, a vibrating table and a timer. The testing procedure is as follows:
The Vebe test mimics how the concrete will act as it is being compacted on site and is therefore a useful way to see how the concrete will behave during compaction.
Also, being a dynamic test, it’s useful for measuring the workability of fresh concrete samples which are too stiff to be measured by a regular slump test.
It is a much less commonly used test for concrete used in constructing industrial warehouse floors.