Facts about Different Plaster Types and Their Uses
The word plaster can refer to three types: gypsum plaster, lime plaster, and cement plaster. These have a variety of uses or applications in different industries. In this brief article, we will discuss some facts about these three kinds of plaster.
Gypsum plaster, also known as Plaster of Paris, is a type of building material that is based on calcium sulphate hemihydrates. It is created in a process wherein gypsum, a soft mineral, is heated up to 150 degrees Celsius. The material is used in a manner that is similar to cement or mortar. It starts out as a dry powder which is then mixed with water in order to form a paste. The paste hardens, though it still remains quite soft even after drying. For this reason, it is especially suitable for finishing purposes, rather than load-bearing ones in construction.
Lime plaster, meanwhile, is a mixture of calcium hydroxide and inert filters like sand. The carbon dioxide in the air causes this type of plaster to set and dry out by turning the calcium hydroxide into calcium carbonate or limestone. The material is created when limestone is heated to produce calcium oxide or quicklime. Lime plaster was once a common building material utilising a process called lath and plaster, but it has since been partially replaced by drywall, which is mostly made up of gypsum plaster.
Finally, cement plaster is a combination of suitable plaster, Portland cement, sand, and water. It is usually applied to masonry interiors as well as exteriors in order to create a smooth surface. In addition, different cement-based plasters are used as proprietary spray fireproofing materials, while heavier versions are utilised for exterior fireproofing purposes.
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