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How to check Quality of Reinforcement Steel bars used for Construction?

The following inspections and tests can be used to ensure the quality of the reinforcing bars transported to the job site:

  • Examine the manufacturer’s certification. This is where the real properties may be found. A manufacturer test certificate is produced for each batch.
  • Examine the steel grade on the manufacturer’s certificate to see if it matches the order.
  • Examine it for rust and other contaminants. It is not appropriate to have an excessive amount of foreign stuff. Make sure there are no major deformations or splits. It’s alright if there’s a little rust.
  • Look for the brand, grade, and diameter on the bar.

Following the aforesaid inspection, the following tests can be carried out on the site in accordance with Indian standard code IS-1786.

Check for mass per meter run

Cutting a 1m length rod from various reinforcement bundles is part of the test. To conduct the test, a minimum of four sample bars must be taken. Take the average of each bar’s lengths from all four sides. Keep note of the weight of the bar. Calculate the appropriate bar’s average weight/m ( Do it for a minimum of 4 samples). Compare the result to the IS 1786 theoretical weight value. Check to determine if the variation is within the bounds of the standard code.

Bend and Rebend Testing

In the bend test, the rebar is bent to 180 degrees in a mandrel according to IS 1599. (Mandrel specification as per IS 1786). On the tension side of the bent bar, look for fractures or ruptures. The rebar has passed the bend test if there are no such difficulties.

The bar is bent at a 135-degree angle in the rebend test. 30 minutes in boiling water with the sample (Boil to 100 degrees). Cool the sample after that. Curve it into a 157.5-degree bend after it has cooled. Look for any cracks or ruptures. The bar has passed the test if there is no problem.

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