Structural Appraisal and Monitoring

Structural Appraisal is to study and evaluate the overall structural adequacy of an existing building by examining the factors like overall stability, strength, durability, impermeability, appearance etc. through Non-Destructive and Partial Destructive tests, and making a report on the conclusions of the study with a recommendation on any remedial measures needed for the structure.

Scope of Work:
1. Gathering of available information and documentation concerning the structure such as as-built drawings, age and history of the structure, previous accidents and damages, previous rehabilitation and modification works, previous testing results and construction details.

2.Visual inspection includes a damage take-off survey and taking photographs.

3.Performing breakouts to expose the extent of damages and extent of reinforcement corrosion.

4.Rebound hammer tests to assess the strength of the surface concrete.

5.Obtaining concrete cores samples which shall be used for:

• Actual compressive strength and density of concrete.
• Chemical analysis like pH, Chloride content, Sulphate content.
• Depth of Carbonation.
• Petro graphic analysis
• Cement content and cement aggregate ratio
• Type of cement
• Indicating type, size and cover to reinforcement.
• Indicating corrosion & condition of reinforcement.

7. Ultrasonic Pulse Velocity Tests for determining the characteristics of cracks and defects in selected structural elements.

8. Tensile strength tests for the reinforcement.

9. Half Cell potential tests to determine the magnitude of corrosion.

10. Inspection pits in the ground to verify the nature of the sub-grade and also to expose and investigate the condition of the foundation.

11. Geotechnical investigation to determine the general subsurface conditions and verify the adequacy of the foundation system used for the structure.