For years we are only taught to dress our internal walls and ceilings only by the traditional way of plastering and fixing as the external works. What if one can replace these with the best benefits and more innovation? Gypsum was that magical product. It is basically a soft sulfate mineral composed of Calcium sulfate dihydrate (CaSO4:2H20) and widely used as a fertilized, in sculptures, and as plaster material. In recent years, the construction sector has witnessed a number of new innovations across applications, all aimed at making construction faster and delivering higher performance.

 Gypsum Plaster can be applied directly on any brick, solid or hollow blocks, AAC blocks, and plasterboards. Gypsum plaster has good insulation properties, fire-resistant, and impact are resistant. Also, gypsum saves a lot of time during construction and has a superior finish. These properties have clearly drawn the attention of real estate builders and contractors towards choosing gypsum plaster over traditional cement plaster. 

However, these all things are the advantages of Gypsum without any further clarifications but, there are cheap gypsum providers who are decreasing the quality of the construction. And we must beware of them. But In Whytal Tech we are converting  SatinsPar And Salinite which are raw gypsum grades Containing High-Quality Natural Fiber  To Plaster Grade. As  Fibre  Is The Base Material, It Is Less Likely To have Crack.

(CaSo4) 2 H2O + 3H2O-> 2 (CaSo4 + un reacted (CaSo4) 2.1 / 2H2O + heat hemihydrate water-> Dihydrate + un reacted hemihydrate + heat (exothermic reaction)

Gypsum plaster setting time, catalysts for controlMaterials for reducing the setting time of gypsum are called accelerators . Eg: Tera alba, sodium sulfate, potassium sulfate, sodium chloride (low concentration)The material used to increase the setting time is called RETARDER. Eg: Borax, sodium chloride, sodium sulfates, (high concentration) glue, agar, coagulated blood All these are added according to the weather only if necessary.

There are 3 theories for the setting quality (crystallization) of the Gypsum product.

1. Colloidal theory

2. Hydration theory

3. Dissolution precipitation theory

Dissolution, Suspension, Saturation, Super saturation, Nuclear formation, Growth of nuclei, Crystallization, Spherulite formation. This is important if you want the plaster to get the right quality

1. Loss of gloss method
2. Exothermic reaction
3. Penetration tests

The methods for measuring setting time are described. This is an area that needs to be explained a little more technically. It will be explained in the coming days. The exothermic reaction is the reaction of water to gypsum powder. The exothermic heat is the heat generated when water is poured into the gypsum powder.