What is the difference between cement plaster and gypsum plaster?

Cement plaster and gypsum plaster are two common types of plaster used in construction. While both are used for wall and ceiling finishes, there are several key differences between them.

1. Composition: Cement plaster is made by mixing cement, sand, and water, while gypsum plaster is made by mixing gypsum powder, sand, and water.
2. Drying Time: Cement plaster takes longer to dry and cure compared to gypsum plaster. Cement plaster may take up to 28 days to fully cure, while gypsum plaster typically dries in 24 to 48 hours.
3. Strength: Cement plaster is stronger and more durable than gypsum plaster. It can withstand higher levels of impact and is more resistant to wear and tear.
4. Water Resistance: Cement plaster is more water-resistant than gypsum plaster. It can be used in areas that are exposed to moisture and humidity, such as bathrooms and kitchens.
5. Surface Finish: Gypsum plaster has a smooth and polished finish, while cement plaster has a slightly rough and textured finish.
6. Cost: Gypsum plaster is generally less expensive than cement plaster.

the choice between cement plaster and gypsum plaster depends on the specific requirements of the project. Cement plaster is typically used for exterior walls and areas that require high durability, while gypsum plaster is often used for interior walls and areas where a smooth finish is desired.