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written 5.1 years ago by |

**The suitability of various non-destructive tests are as follows.**

Surface hardness test- To estimate the concrete strength using Williams testing pistol and impact hammer.

Rebound hammer test- To estimate the strength of concrete and comparative investigations.

Ultrasonic pulse velocity test- To determine homogeneity of concrete mass and strength of concrete.

Penetration and pullout technique- To determine penetration and pullout resistance of concrete mass and hence to determine concrete strength.

Dynamic or vibration test- To evaluate durability and uniformity of concrete and to estimate its strength and elastic properties.

Radioactive method-To measure density and thickness of concrete using X and gamma ray

Nuclear method- To determine moisture and cement content.

Magnetic method- To determine cover of reinforcement in concrete mass.

Electrical method- To measure moisture content and thickness of concrete.

Acoustic emission techniques- To study the initiation and growth of cracks in concrete.