What are the factors affecting the performance of plastering gypsum?
(1) The most suitable amount of hemihydrate gypsum.
(2) The basic components of plaster of paris.
(3) It is most suitable for the grinding and firing process of producing this plaster of paris.
(4) The quality and quantity of the additions.
(5) Stirring type, adjustment of temperature and humidity.
For example, the plaster of paris used for plastering in foreign countries often does not add other mixed materials. It is simply a mixture of hemihydrate gypsum and burnt gypsum. This plaster is called base plaster.
Because the hemihydrate gypsum in it hydrates quickly. Therefore, the base plaster plaster can achieve high strength in a short period of time. Afterwards, the burnt gypsum in it slowly hydrates. Allow the substrate plaster of paris to crystallize completely. Strengthen the cohesion of the lattice. Shrinkage due to drying is compensated to avoid cracks.
When producing base plaster, the range of the ratio of hemihydrate-burned gypsum in the base plaster can be determined according to the purity of the dihydrate gypsum used and the reactivity of its components, as well as the requirements for the product.
Landcel produces HPMC for plastering gypsum. Improve the water retention and anti-sag properties of plastering gypsum.