Testing of 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 categorise fresh concrete properties.
- 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 intergal 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, Sandberg are able to 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 further information contact: Richard Rogerson, Partner
Direct Tel: 020 7565 7080