문교산업
Gypsum is obtained by burning dihydrate gypsum ( CaSO4-2H20 ) and modifying it to hemihydrate gypsum ( CaSO4-1 / 2 H2O ), and gypsum which forms fibrous consecutive assembly is called fibrous gypsum and fine textured dense assembly is called alabaster respectively . ... Civil Engineering. For road reinforcement, ground improvement etc ...