### Effect of Pozzolan Usage on Shrinkage
#### What is Shrinkage?
Shrinkage refers to the reduction in volume that occurs in concrete as it hardens and dries. This phenomenon is primarily due to the loss of moisture as well as chemical processes that take place during hydration. Shrinkage can lead to cracking, reduced durability, and compromised structural integrity if not adequately managed.
#### Types of Shrinkage
1. **Plastic Shrinkage**:


