Scope of UKAS Accredited Concrete Testing Extended

UKAS accreditation is part of the quality assurance promise from CET. Extending our accreditation to include a broader range of tests is part of our continued growth strategy and is further evidence of our commitment to delivering an excellent service across the whole of the UK.

We are pleased to announce the recent extension of our scope to deliver UKAS accredited concrete tests. As of July 23rd, we are now able to offer a more inclusive set of Self Compacting Concrete tests, including:

  • L Box
  • J Ring
  • V Funnel
  • Sieve Segregation
  • Slump Flow Test

More information on these tests is available below.

L Box

The L box test is used to assess the passing ability of self-compacting concrete to flow through tight openings; including spaces between reinforcing bars and other obstructions, without segregation or blocking. There are two variations, the two-bar test and the three-bar test, with the three-bar test used to simulate more congested reinforcement.

J Ring

The J-ring test is also used to assess the passing ability of self-compacting concrete, through tight openings including spaces between reinforcing bars and potential obstructions without segregation or blocking. There are two variations, a narrow and wide bar spacing test. The narrow bar spacing simulates more congested reinforcement.

V Funnel

The V-funnel test is used to assess the viscosity and filling ability of self-compacting concrete.

A V shaped funnel is filled with fresh concrete and the time taken for the concrete to flow out of the funnel is measured and recorded as the V-funnel flow time.

Sieve Segregation

The sieve segregation resistance test is used to assess the resistance of self-compacting concrete to segregation.

After sampling, the fresh concrete is allowed to stand for 15 min and any separation of bleed water is noted. A defined top part of the sample is then poured onto a sieve with 5 mm square apertures. After 2 minutes, the weight of material which has passed through the sieve is recorded. The segregation ratio is then calculated as the proportion of the sample and the material passing through the sieve.

Slump Flow Test

The slump-flow test is used to assess the flowability and the flow rate of self-compacting concrete in the absence of obstructions. It is based on the slump test described in EN 12350-2. The result is an indication of the filling ability of self-compacting concrete.

For further details, and a full schedule of concrete testing services from CET. Visit our Laboratory Testing Page or download the Materials Testing Brochure.

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