Segregation can be avoided by taking following precautions.

1. The design of the concrete mix should be done properly.

2. Water content should not be added more than the desired amount.

4. A proper vibration also reduces the chances of segregation.

5. Concrete should not be dropped from more heights.

6. Air entraining admixtures can be used to enhance the viscosity of concrete.

7. Formwork should be always watertight to prevent leakages.