The change of gypsum type and dosage was found through experiment to have large effect on the set accelerating and strength enhancement of cement.

Gypsum breccia belongs to a new kind of breccia, which is dissovled by soluble suphate rock, and also belongs to a new type of special rock in engineering exploration.

Gypsum boards with mat reinforcement are selected for use according to their type, size, thickness and edge profile.