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 categorise 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 are easily assessed using a pressure-type air meter.
Fresh density, compactibility and bleeding can all be measured.
From Quality Control and Mix Design assessment to Admixture testing, Sandberg can carry out a comprehensive range of fresh concrete tests.
References: BS EN 12350 series, Testing fresh concrete.
BS EN 480 series, Admixture test methods.
BS 1881 series, Testing concrete.
For more information, contact our in-house expert:
