• Construction Dry-mix Calcium Sulfate (Plaster, Gypsum and Anhydrite)

Calcium Sulfate Dihydrate (Gypsum)

• Calcium Sulfate Dihydrate is a type of Gypsum. It is also commonly known as Gypsum Dihydrate or simply Gypsum. Overall, Gypsum is a versatile material that can be used in a wide range of dry-mix and pre-packaged bagged products to improve workability, reduce cracking, and improve the overall performance of the finished product. When mixed with water, it undergoes a chemical reaction known as hydration and starts to harden, forming a solid mass in a few minutes. The final product, Calcium Sulfate, is anhydrite, a complex and robust material.

  • Setting time: Gypsum can accelerate or retard the setting time of concrete depending on the desired result. This allows for more precise control over the setting time, which is particularly useful in construction projects where timing is critical.
  • Strength: Adding Gypsum can enhance concrete’s compressive and flexural strength by promoting the formation of Calcium Silicate Hydrates (CSH) and Calcium Aluminate Hydrates (CAH), the main bonding agents in concrete.
  • Durability: Gypsum can improve the durability of concrete by reducing the permeability of the material, which can help prevent water and other corrosive substances from penetrating and damaging the concrete over time.
  • Appearance: Gypsum can improve the appearance of concrete by reducing surface defects such as cracking and crazing. It can also help produce a smoother surface finish, particularly useful for decorative applications.