Importance of Non-Destructive Testing on Concrete

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Importance of Non-Destructive Testing on Concrete

 

Importance of Non-Destructive Testing on Concrete

 

Durability, strength, and viability of any structure are crucial before occupying it for any use. Any structure, be it new or an old one (which is open for re-occupancy) can be assessed if required. Though it is not a prerequisite to have it done for the existing owner or a prospective owner. However, it is always advisable to have it done in order to learn and evaluate longevity, resistance, and stability. Though the common method, which is used, is to assess the quality by collecting a specimen of the structure while it is under construction, the result of the specimen can differ from an erected structure. For that, Non-Destructive Testing methods are the most reliable. They not only give the true picture of the tenability of the concrete structure but also elaborate on factors like hardness of the concrete, resistance, rebound capacity, and a structure’s suitability for any intended use.

How will Non-Destructive Testing help?

Non-Destructive Testing does not add or lessen the weightage of any structure. However, it does help in learning about a structure’s strengths and weaknesses before it is used. Of course, weaknesses, here refer to the areas which can be overhauled to reinstate the strength of a structure. The cost that the rework would incur, is of course upon the occupant to decide, whether he/she wants to bear.  For instance, if an already erected structure is being used for storing heavy-load machines/equipment then it is imperative to have a strength measurement in your hand.

What is measured through Non-Destructive Testing?

The Non-Destructive Testing helps in determining the elements of a structure like;

  • Measuring the volume or density of the material and components of a concrete structure.
  • Locating any cracks or voids and ascertaining if they are any harm to the durability of the structure.
  • The uniformity of the concrete is also measured without harming the structure.
  • Non-Destructive testing is also done to measure factors like overloading, fatigue, external or internal chemical attack, any adverse effect of fire or environment.

Non-Destructive Methods used for testing a Concrete Structure

The non-destructive testing method is beneficial as it does not impose any harm on the structure as is done during coring or testing through other destructive methods. There are many methods to ascertain different factors of a structure like moisture content, humidity level of a structure, cracks, or position of steel bars. Any discrepancy can adversely affect the endurance of the structure. The different testing methods are;

  • Windsor Probe Test: is done to determine the hardness of the concrete through an ultrasonic probe.
  • Rebound Hammer Test: This is conducted to ascertain the uniformity of the concrete.
  • Concrete Crack Monitors: The test is done to measure the width of any visible crack in a concrete structure and evaluates its plausible threat.
  • Moisture Testing of Concrete Structure: This is done to see if the concrete structure has enough moisture for its durability. Any structure with inappropriate moisture can wear off faster.
  • Concrete Humidity Measurement Test: This is different from the moisture test and evaluates the humidity level within the structure.
  • Rebar Locator Test: This is done to check the right positioning of the steel reinforcement in concrete and its durability.

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