Gypsum is a versatile binding material derived by heating gypsum rock (CaSO₄·2H₂O) to expel some or all of its crystallization water. This process converts the rock into a usable form for various applications. The pure gypsum rock primarily consists of calcium sulfate dihydrate, but it often contains impurities such as magnesium oxide (MgO), aluminum oxide (Al₂O₃), iron oxide (Fe₂O₃), silicon dioxide (SiO₂), calcium carbonate (CaCO₃), and magnesium carbonate (MgCO₃). These impurities can influence its properties and suitability for different manufacturing processes and industries.
The time taken from mixing gypsum and water to when the material reaches its required hardness is called the setting time. For pure gypsum paste, this time is typically around 30 minutes. Anhydrous gypsum or impure pastes may have varying setting times. This property is crucial for shaping the material effectively. In India, it plays a key role in ensuring the desired texture, finish, and durability in gypsum plastering.
Plasticity refers to how easily plaster or mortar can be shaped and spread. For proper application, it is essential that the mixture is neither too sticky nor too stiff. In India, the plasticity of gypsum plaster is primarily influenced by the amount of water in the mix. Additionally, the sand content can also impact its plasticity, affecting how easily the plaster can be applied and manipulated during the plastering process.
The compressive strength of gypsum plaster and mortars is typically three or more times greater than their tensile strength. Gypsum plaster exhibits high compressive strength, making it ideal for construction and building projects. This characteristic is particularly valuable in gypsum plastering applications in India, where durability and strength are essential for long-lasting results.
➊ Smooth Finished Walls
➋ No Water Curing Required
➌ Heat and Moisture Resistant
➍ No Shrinkage
➎ No Cracking at all
➏ Pure White Finish
➐ Ready for Painting
➑ 30% More Profitable than Cement Plastering
➒ No Need for Cement, Sand, White Cement, or Wall Putty
The setting time in gypsum plastering refers to the period between mixing gypsum with water and the point at which the material begins to set and solidify.
1. Pure gypsum paste typically sets within approximately 30 minutes.
2. This setting time is crucial for properly shaping and finishing the material during application.
After the initial setting phase, the hardening stage begins, during which the gypsum plaster continues to strengthen and solidify.
1.Gypsum molecules bond and crystallize throughout the hardening process.
2. This ensures the plaster becomes durable and resilient over time.
3. In gypsum plastering in India, proper hardening is vital for achieving long-lasting, smooth finishes on walls and ceilings.
4. Adequate hardening also improves the plaster’s resistance to wear, impact, and environmental factors.
Gypsum plaster sets rapidly, cutting down the time needed for each application layer. This makes it an excellent choice for projects demanding quick completion and efficiency.
Gypsum plaster provides a smooth, refined finish that enhances the look of walls and ceilings. It delivers a sleek, high-quality surface that’s ready for painting or decorating.
Gypsum plaster is significantly lighter than traditional cement plaster, reducing the overall structural load on buildings and making it easier to handle during application and renovation work.
Once hardened, gypsum plaster provides a resilient and long-lasting surface. It resists cracking and offers superior adhesion, making it ideal for applying paints and finishes.
Gypsum plaster helps minimize sound transmission between rooms by creating dense, seamless wall surfaces that absorb and dampen airborne noise, enhancing indoor acoustic comfort.
Gypsum plaster offers excellent thermal insulation, maintaining consistent indoor temperatures. This contributes to enhanced energy efficiency by reducing the need for excessive heating or cooling.