TPT Civil Testing & Consultancy
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Thiagarajar Polytechnic College, Junction Main Road (TPT),
Salem - 636005, Tamilnadu.

Non - Destructive Test (NDT)

Non-Destructive Testing (NDT) is a crucial aspect of engineering services for both new and existing structures. For new constructions, NDT primarily serves as a quality control measure and helps resolve any uncertainties regarding the quality of materials or workmanship. When applied to existing structures, NDT plays a vital role in evaluating their structural integrity and adequacy.

Importantly, these tests are generally conducted without causing damage to the concrete. Through NDT, a wide array of concrete properties, including density, elastic modulus, strength, surface hardness, absorption characteristics, and the location, size and depth of reinforcement can be determined. NDT services include:

Non - Destructive Test (NDT)
Non - Destructive Test (NDT)

a)   Ultrasonic Pulse Velocity Test

This non-destructive technique allows us to assess the quality of concrete on-site by measuring the velocity of ultrasonic pulses transmitted through the concrete between transducers. The procedures outlined in IS 516 Part 5 Sec 1: 2018 are followed.

b)   Rebound Hammer Test

This method provides a rapid and convenient indication of the compressive strength of concrete without causing damage. The objectives of this test are:

  • To estimate the compressive strength of concrete by correlating the rebound index with compressive strength.
  • To evaluate the uniformity of the concrete.
  • To assess the overall quality of the concrete based on established standards.

The procedures outlined in IS 516 Part 5 Sec 4: 2020 are followed.

Type of Test Material Test Name Test Method
Civil - Mechanical Parameters NDT for Concrete Ultrasonic Pulse Velocity Test IS 516 Part 5 Sec 1: 2018
Rebound Hammer Test IS 516 Part 5:Sec 4:2020
Carbonation Test IS 516 Part 5:Sec 3:2021
Depth of Cover BS 1881-204: 1988
Half Cell Potential Test IS 516 Part 5: 2018
Permeability Test IS 3085: 1965

Want to ensure quality from the ground up?

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