TESTING - FRESH CONCRETE

The suitability of a concrete for any task is initially assessed whilst that concrete is still in its freshly mixed state before setting occurs:

• Is it workable?
• Will it pump
• Does it hold together or segregate?
• Is it air entrained?
• Will it bleed?

Well established tests are used to categorize fresh concrete properties.

Workability/Consistency

• Slump test - the most widely used test for assessing the workability of concrete of normal consistency (slump 10mm to 200mm).
• Flow Table test - for concretes that are more free flowing (slump 180mm+).
• Vebe Test - for concretes that are not workable in the normal sense, the test uses integral vibration.

Control and measurement of air content is easily assessed using a pressure type air meter.
Fresh density, compactability and bleeding can all be measured.
From Quality Control and Mix Design assessment to Admixture testing.

References : BS EN 12350 series, Testing fresh concrete


SLUMP TEST

FLOW TEST