Concrete Cube Compression Testing

Concrete cube testing is a simple, cost-effective test to prove the compressive strength of hardened concrete. This affordable test helps to determine the specified strength is being achieved, thus, giving you peace of mind that the concrete is fit for purpose and strong enough for the job intended.

Our cube compression testing service is a fully accredited UKAS service.

Cube dimensions we commonly compressive test

  • Prisms - 160 mm x 40 mm x 40 mm
  • 70's - 70 mm x 70 mm x 70 mm
  • 100's - 100 mm x 100 mm x 100 mm
  • 150's - 150 mm x 150 mm x 150 mm
  • beams - assorted dimensions

All concrete cube samples are correctly water cured and digitally monitored for specific periods of time at our UKAS Accredited Laboratory prior to crushing to determine the maximum compressive strength for the test age.

Common compressive test ages

  • 7-day
  • 14-day
  • 28-day
  • 56-day

In addition to the above test ages, many clients choose to have a "spare" cube sample available in case the 28 or 56 day does not reach or exceed the target strength. In cases where 2 x 28-day cubes are to be crushed on the same day, and a spare cube is not available from the same batch and the first sample fails, we do not test the second sample and seek client instruction and authorisation. This often enables the client to move the remaining sample to a later test date. This is one of the many safety procedures we have put in place to protect our clients' interests.

What happens with cubes that do not reach strength at 28 days?

Samples which do not reach the required strength at 28 days and "technically" fail are kept securely for one calendar month in a separate area. This is our standard policy to enable post-analysis inspection if required. Upon request, we can cut the sample in half for deeper inspection.

Sample preparation

Prior to testing each and every concrete sample is fully assessed by our laboratory technicians:

  • size checked using go-no-gauge to ensure samples are not out of size
  • ensure there are no fractures, chips or fragmented edges
  • Weighed in water and air to obtain the density
  • a final visual inspection to confirm correct sample identification and selection

We use state of the art calibrated temperature monitoring equipment in our water curing tanks. This ensures near 20°C temperature around the clock, 365 days a year. 20°C is the ideal temperature for curing concrete.

We record each compressive test in high definition for post analysis and client viewing if required. View our popup concrete cube crush demonstration video (2 min 14 sec).

Test reports & video

Our detailed PDF test reports are checked for accuracy and issued to you and your colleagues via e-mail within minutes of testing. All test reports, videos and photos can be viewed and downloaded from our secure client portal at any time.

All test reports are securely kept on file for 6 years.

Did you know we offer a Nationwide cube collection service...

Simply enter your postcode below to find out which days we collect from your area.
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This article forms part of our concrete services.