Know About Concrete Strength Test and Its Application

Hardened concrete can be tested to determine its strength and quality. Concrete strength tests are designed to determine the compressive strength of the material and its ability to resist loads. Here are some of the things you should know about it:

  • Why it’s done – Compressive strength tests are conducted to ensure that the concrete mixture being used for construction can meet the requirements for specified strength in a given job specification.
  • How it’s done – Concrete cylinders must be created and cured following the procedures described in the AS1012.8 for cured specimens before they are tested.  That way, you can be sure that you can conduct the concrete strength test correctly and the results will be reliable.. Cylindrical specimens are tested following AS1012.9, under the test method for compressive strength of cylindrical concrete specimens.
  • The formula - Concrete’s compressive strength is measured by dividing the failure load by the cross-sectional area resisting the load, and the result is expressed in MPa (Mega Pascals). The test result is an average of at least two standard-cured strength samples made from the same batch of concrete and tested at a similar age. Most tests require the specimens to be at least 28 days old for a final strength, cylinders taken before this date are considered “Early Age” strength, used to inform decisions like stripping of formworks.
  • Machines and special equipment are used for testing – To avoid guesswork, concrete strength tests are conducted using compression testing machines, which can be manual, semi-automatic, or automatic.

Comments

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