Description/ Specification of Plaster Of Paris (P.O.P)

Plaster of Paris (POP) is a rapid-setting construction material produced by heating gypsum (CaSO₄·2H₂O) to around 150°C (300°F). This operation drives off water, changing gypsum to calcium sulphate hemihydrate (CaSO₄·½H₂O). On addition of water, POP undergoes hydration reaction, changing back to gypsum and hardening to a solid mass. Composition: Main ingredient: Calcium sulphate hemihydrate Minor additives: retarders (e.g., glue, sodium citrate) to regulate setting time Typically in fine white powder form Properties: Quick-setting: Sets within 5–10 minutes and hardens in approximately 30 minutes Lightweight with a smooth finish Low thermal conductivity, thus an effective insulator Porous structure; not recommended for wet areas unless treated Can be easily moulded into complex shapes prior to setting Shrinkage-free setting with minimal cracking Chemically stable and non-combustible Uses: Construction & Interiors: Wall and ceiling finishes for smooth, decorative surfaces False ceilings, wall mouldings, and cornices Patch repairs in walls and ceilings Decorative Arts: Decorative wares, sculptures, and architectural features Medical Applications: Medical models Making orthopaedic casts for bone fractures Dental moulds and impressions Industrial Uses: Mould-making in ceramics, pottery, and precision casting Fireproofing layers for special materials Limitations: POP is not water-resistant; long exposure to moisture reduces its strength. Hence, it is not often used for exterior work in damp conditions. In short, Plaster of Paris is appreciated for its fast setting, smooth texture, and wide range of applications, hence becoming a construction, art, and industrial favorite. On the other hand, its vulnerability to water demands cautious use in appropriate surroundings. #plasterofparis #pop DECLARATION: TEXT CONTENT IN THIS PAGE IS AI GENERATED