What is the point of mixing water and salt after using plaster

What is the Point of Mixing Water and Salt After Using Plaster? Plaster is a widely used material in the construction industry for various applications such as creating surfaces on walls and ceilings or for casting decorative elements. After using plaster, it is common practice to mix water and salt. But have you ever wondered why this step is necessary? Let's delve into the reasons behind this process. The primary purpose of mixing water and salt after using plaster is to create a saline solution, which plays a crucial role in enhancing the plaster's durability and strength. When water and salt combine, they produce ions that react with the plaster's chemical composition, resulting in a more solid and resilient material. One of the key benefits of using a saline solution is its ability to improve the plaster's setting time. By adding salt to the water, it accelerates the chemical reactions within the plaster, causing it to harden at a faster rate. This is particularly useful in construction projects where time is of the essence. The quicker the plaster sets, the sooner other construction activities can continue without causing any delays. Furthermore, the use of a saline solution significantly reduces the risk of cracking in plaster. Plaster tends to shrink as it dries, and this shrinkage can result in the formation of cracks. By mixing water and salt, the resultant saline solution helps to prevent this shrinkage, subsequently reducing the likelihood of cracks developing. This is especially important in regions with extreme temperature variations, as the saline solution acts as a stabilizing agent for the plaster. Another advantage of using a saline solution is its ability to enhance the plaster's adhesion properties. When the saline solution is applied to the plaster, it creates a stronger bond between the plastered surface and any subsequent layers or coatings. This increased adhesion strengthens the overall structure, minimizing the risk of detachment or peeling over time. Moreover, the presence of salt in the saline solution helps to prevent the growth of mold and mildew on the plastered surface. Salt has antimicrobial properties that inhibit the growth of these microorganisms, which thrive in damp and humid environments. By using a saline solution, the risk of mold and mildew formation is significantly reduced, making it an ideal choice for areas prone to moisture. It is essential to note that the ratio of water to salt is crucial to achieve the desired effects. Generally, a 5% salt concentration is recommended, meaning that for every liter of water, you should add 50 grams of salt. This ratio ensures the optimal balance between strengthening the plaster and preventing excessive shrinkage or cracking. In conclusion, mixing water and salt after using plaster serves several important purposes. It accelerates the setting time, reduces the risk of cracking, enhances adhesion, and inhibits the growth of mold and mildew. By incorporating a saline solution into the plastering process, contractors and builders can ensure the longevity and durability of their constructions. So next time you see someone mixing water and salt after using plaster, you will have a better understanding of its significance in achieving a superior end result.