Hello guys, I am here to share my knowledge on Non-Destructive Testing (NDT). In this presentation, I tried to explain on the following topics: 1. why we use NDT (purpose)? 2. Condition Assessment of the Structures by Non-destructive Evaluation Techniques 3. Concrete Petrography Implications 4. Potential as a DiagnosticTechnique 5. Common Applications of Microscopy in Concrete Science and Technology 6. Thermographic (Infrared Thermal Imaging) With interesting pictures and much more... I put some effort to present in front of you. So, kindly if you find any mistakes feel free to text.