The main difference between high-strength gypsum and ordinary gypsum

The high strength of products made of high-strength gypsum, in comparison with products made of ordinary gypsum, is a consequence of the size, density and nature of the surface of crystals of high-strength gypsum GP, as well as the fact that some of these crystals remain in the hardened gypsum dough, forming a tangled fibrous structure that serves as reinforcement in it. High-strength gypsum has an advantage over ordinary gypsum in all respects.

High-strength gypsum is primarily a monomineral product: it lacks minerals such as anhydrite-CaS04 and dihydrate gypsum-CaS04-2H20, which accelerate the setting time of gypsum and reduce the strength of gypsum castings.

The correct geometric shape and higher crystal density of high-strength gypsum cause a lower water demand, compared to ordinary gypsum, for obtaining the same workability of gypsum dough and greater strength of products made from it. A solution of high-strength gypsum shows a less acidic reaction compared to a gypsum solution made of ordinary gypsum, which means that steel reinforcement in products made of high-strength gypsum undergoes less corrosion compared to ordinary gypsum.

Products made of high-strength gypsum are less thermally conductive than products made of ordinary gypsum. Due to its high strength, high-strength gypsum can be used as a binder for the manufacture of load-bearing structures, which is of great importance, since high-strength gypsum is the most rapidly hardening binder.