Assertion: gypsum | /r/HasProperty | the material
Facets:
Source sentences:
text: In fact, gypsum, the material that drywall is made of, is so sensitive to moisture that drywall can be considered moisture-compromised if its %MC ever rises above 1%.
text: Gypsum is one of the few materials, which allow a completely closed cycle of recycling; in the production of the gypsum construction materials, the first stage is calcination of gypsum (burning) – extraction of the water, bounded in a crystal line, from the raw material (whether natural or technical gypsum), by means of heating up to approximately 200 °С.