Write one suitability of each different six non-destructive tests. 

1 Answer

Answer :

The suitability of various non-destructive tests are as follows. 1. Surface hardness test- To estimate the concrete strength using Williams testing pistol and impact hammer. 2. Rebound hammer test- To estimate the strength of concrete and comparative investigations. 3. Ultrasonic pulse velocity test- To determine homogeneity of concrete mass and strength of concrete. 4. Penetration and pullout technique- To determine penetration and pullout resistance of concrete mass and hence to determine concrete strength. 5. Dynamic or vibration test- To evaluate durability and uniformity of concrete and to estimate its strength and elastic properties. 6. Radioactive method-To measure density and thickness of concrete using X and gamma ray 7. Nuclear method- To determine moisture and cement content. 8. Magnetic method- To determine cover of reinforcement in concrete mass. 9. Electrical method- To measure moisture content and thickness of concrete. 10. Acoustic emission techniques- To study the initiation and growth of cracks in concrete.

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