Plaster of Paris
When a wall is constructed with brick or block, they are finished with a coat of plaster which is called internal plastering. Internal plastering has traditionally been done through a process of sand-cement plastering finished with POP pruning.
This is a two-stage process and involves multiple elements like sand, cement, and water which are mixed onsite. This form of plastering is being slowly replaced by a direct single-coat application of gypsum plaster. So, gypsum plaster is actually a replacement of two processes i.e. sand cement plastering & POP punning. Gypsum plaster is produced as a result of calcinations of the raw gypsum in an automatic kettle under controlled temperature.
Features of Gypsum Plaster
- Well suitable with all kinds of paints.
- Free of shrinkage cracks.
- Shrinkage crack-free surfaces smooth finish & High productivity faster.
- Direct application on brick, block, or RCC, no separate finish product required.
Frequently Asked Questions
1. What is the gypsum plaster specification?
Ans - Plaster of Gypsum Thickness
It can be used in thicknesses ranging from 6 to 20 mm. Gypsum plaster's undercoat typically measures 11 millimetres for walls and 8 millimetres for ceilings, while the thickness of the finish coat is 2 millimetres. To prevent cracks, it is advised to apply gypsum plaster at a minimum thickness of 6 mm.
2. Will gypsum soak up water?
Ans - The maximum amount of water that gypsum mould can absorb under atmospheric pressure is referred to as the water absorption ratio of gypsum.
3. What is the gypsum's strength?
Ans - This innovative method results in gypsum bodies that are both mechanically and very dense. Gypsum plates with a density of 1.6 g.cm-3 were found to have bending and compression strengths of up to 15.0 and 40.0 MPa, respectively.