How To Overcome The Shortcomings Of Cement Sand Plaster?
What's cement sand plaster?
Cement plaster is formed by combining cement, sand, and water, and the cement and sand ratio is typically 1:4. Depending on the surface to be plastered, the plaster's thickness might be from 12 to 20 milliliters. Plasticizers are often sometimes mixed in the plaster to safeguard walls from parasites.
What's gypsum plaster?
It is a ready-made plaster and is used in combination with water after mixing it. The color is white, and the shape is powder. For wall and ceiling plastering, the Thickness varies; it may be about 11 millimeters for the wall, while the Thickness for the ceiling is just around 8 millimeters. To have types of plasters, gypsum plaster can also be heated at particular temperatures.
Overcome shortcomings of cement sand plaster with gypsum plaster
Cement sand plaster has several shortcomings having its application. The use of gypsum plaster rather than cement sand plaster helps overcome the shortcomings that come with the cement sand plaster application.
Cement sand plaster requires both pre-curing and post-curing steps. Over several days, it takes plenty of water for curing and is usually time-consuming while drying the outer lining, although Gypsum plaster doesn't require curing and saves a lot of water. The full total drying time is also comparatively less than from cement sand plaster.
The friction and physical strength of cement sand plaster are fragile, and it could grow cracks over time. Much of this cracking results from plaster shrinkage during the drying process, but higher strength is rendered with the use of Gypsum plaster, and it's less vulnerable to cracking and shrinkage.
Cement sand plaster is moisture-resistant however, not 100 percent vapor-permeable. The vapor can result in condensation on the walls in wet areas such as kitchens and bathrooms, which could cause mold and fungi at first glance and can also turn slippery. At the same time frame, gypsum plaster can not be utilized in wet areas, but insects don't damage it, and the chance of molds and fungus isn't present. This is the reason why gypsum plastering is preferred in hospitals and clinics.
POP punning after cement sand plaster is used for a desired smooth finish, whereas gypsum plaster has a fabulous bonding property and can therefore be applied on rough and smooth surfaces. It offers the top for painting a clean and finished look.
The applying of cement sand plaster is really a very time-consuming method, and the percentage of waste during implementation is, therefore, higher, leading to increased project costs. In comparison, the applying time is less in gypsum plaster than cement sand plaster and thus decreases the project cost.
Cement sand plaster, which can be up to 200 to 300 C, serves as a refractory material and prevents fire, nonetheless it becomes brittle later and cracks and falls, and loses wall bond. Gypsum is non-combustible and includes a high crystal water content. It serves as a shield in a fire and will protect the concrete, steel, and blockwork.
Cement plaster thickness shouldn't be smaller than 10 mm. The Thickness of cement plaster may differ, depending on the surfaces to be coated and its plumb and texture. The undercoat density coat of gypsum plastic is usually 11 mm thick for walls and 8 mm thick for the ceiling, and complete coat plaster is 2 mm thick.