SMECNondestructive testing in Civil Engineering (NDT in Civil)

Nondestructive testing in Civil Engineering (NDT in Civil)



NDT in Civil, Nondestructive testing is widely used in many industries, this test is carried out in the civil industry. This test is also carried out in many other industries such as Electrical, mechanical, and a lot more. This test is done to determine the quality of the material or a structure without any damage to the material or structure. The major advantage of civil NDT testing is that it won’t make any changes or damages to the product or structure. So by conducting this test we can save money and also we can determine the quality of the structure.

We can consider civil NDT as the noninvasive type of test to determine the quality of the material, device, or structure. It is a kind of assessment that is done without making any changes in the component, device, or structure in which the testing is being conducted. By doing this test we can do the quality control of the construction site, we can detect if there is any fault in the building or in any other structure.

These tests can be done really quickly and easily and it is really economical. This test would provide proper data and Nondestructive testing is an internationally accepted testing procedure.NDT testing is required in Civil, there are different types of NDT testing and also there are three levels of NDT certification. NDT is used in different sectors

Why Nondestructive testing is required in the Civil sector?

Nondestructive testing plays a major role in our daily life. The roads that we travel and the buildings that we stay and the way of transportation like bus, train, or boat everything requires nondestructive testing. So if we are not able to determine the quality of the structure then it can lead to many dangerous results. If we are not able to find out the faults at the proper time then it could cost several lives too. So due to this Civil NDT plays a major role in our life.

We can determine the faults such as cracks, or inclusions in welds, or if there are any changes in the structural properties by doing the NDT. This test can be done in a cost-effective way and also we can determine the reliability of the product or the structure. We can prevent accidents by this test and thus protection of human life and the environment can be easily done.

How civil NDT test would be useful to determine the quality of a structure?

  • This testing method would be able to test the actual structure
  • We can do the NDT tests in several locations in a structure
  • The quality and life of the structure can be determined
  • We can test the structure in various stress conditions
  • Damages and cracks can be easily determined
  • Changes in concrete and other materials can be determined because of the frequent testing
  • We can determine the overall stability of the structure
  • Stress locations can be easily determined
  • During this test, we can determine if there is any damage due to chemical attack, fire, aging, etc.

What is the major role of a Civil NDT technician?

  • NDT technician must be capable enough to test the structure according to the procedure to determine the quality of the structure
  • NDT technicians must do the inspection of duties and should create reports based on the inspection
  • Make sure that the equipment which is used to do the testing is operating properly or not
  • NDT technicians must be able to complete the job according to the budget
  • NDT technicians must be able to do all the inspections

What are the major job opportunities for a Civil NDT professional?

  • QA QC Engineer
  • QA QC supervisor
  • Manufacturing
  • Equipment inspectors
  • Quality control Engineer
  • QA Executive

If you are a certified NDT professional then you would get a lot of opportunities globally. There are a lot of job opportunities in the oil and gas sector, the construction field, etc. If you have good skills in this job then you would get easily placed in major MNCs. The salary package of the civil NDT would range from 40000 to 250000/month. So based on your experience and skills this could vary.

What are the different levels of NDT competence?

NDT level 1

If someone is NDT level 1 certified then that person would be able to carry out the testing procedure according to the supervision of level 2 and level 3 personnel. The level 1 certified personnel would be capable to set up the NDT equipment, Conducting the test, classification of the test results, etc. This person won’t select the test method or the assessment of the test results.

NDT Level 2

An NDT Level 2 certified professional would be capable to perform the tests. This personnel would choose the testing method and also set up the equipment. Must be able to supervise the tests and also should be capable to evaluate the result according to the standards.

NDT level 3

NDT level 3 certified professional should be capable to do any kind of NDT test. This person would be entirely responsible for the testing and should be able to provide proper instructions for the testing. Must be able to supervise everything related to the NDT testing. This person would be able to give proper guidance to all personnel at different levels.

What are the different types of Civil NDT testing?

Rebound method

This test is conducted to determine the strength and hardness of the structure. This test is based on the principle that the rebound of the elastic mass is dependent on the hardness of the structure that it hits. So during this test, a plunger of the hammer would be pressed strongly and steadily against the structure till the spring-loaded mass would be triggered from the locked position. This device would rebound according to the hardness of the concrete, and the rebound distance would be checked to determine the strength of the structure.

NDT in Civil
Nondestructive testing in Civil Engineering (NDT in Civil) 3

Penetration resistance test

This test is also called as Windsor probe test, in this test the strength of the concrete would be determined by penetrating a metal rod into the concrete structure. A specified power would be given to the metal rod for the penetration and by the depth of penetration, the strength of the structure would be determined.

Ultrasonic pulse velocity (UPV) test

The operating principle of this test is based on the fact that the velocity of the sound in the solid material is dependent on the density of the solid material. The equipment would generate some pulses of vibration at an ultrasonic frequency. Then the time taken by the pulse to travel the concrete structure is determined.

Nondestructive testing in Civil Engineering (NDT in Civil) 4

Radiographic testing

In this type of testing, Gamma rays would be transmitted to the concrete structure. The strength of the structure can be determined by the penetration index of the ray.

Pull out test

In this test, a rod would be cast into concrete to a specified range of depth. So the force which is required to pull out the metal rod is calculated to determine the strength of the concrete.

What is the need for Nondestructive testing?

  • We can determine the strength of a structure
  • The density of the structure can be determined
  • Strength can be determined
  • We can also determine if there is any damage to the structure
  • Surface absorption can be determined
  • Surface hardness can be determined
  • By doing this test we can evaluate the work quality

What are the major fields where NDT is used?

  • Civil
  • Electrical
  • Mechanical
  • Aerospace
  • Medical field
  • Manufacturing sectors
  • Security

How to secure your career?

If you are planning to start a career in NDT then you should be a certified professional, because major companies are looking for skillful certified professionals. You can choose SMEClabs to start your career in NDT. After completing this course you would be able to do the Civil NDT tests and you would be internationally certified too. We have many experienced professionals to train you so you can acquire a lot of skills from them.

Author – Ashlin A J

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