gipsbasert

Gipsbasert describes materials or products in which gypsum, chemically calcium sulfate dihydrate (CaSO4·2H2O), is the main binder or constituent. Gypsum can occur in natural form or be produced by calcining gypsum to form plasters such as calcium sulfate hemihydrate (CaSO4·0.5H2O), which then rehydrates and hardens in use. Gypsum is commonly processed into boards, plasters and leveling compounds for construction and interior finishing.

Common forms include gipsbaserte plater (gypsum boards or drywall) with paper or fiberglass facings, gipsbaserte puss (plaster), og gipsbaserte avrettingsmasser (leveling or smoothing compounds) for floors and ceilings. Gypsum is also used in gipsbetong and other specialized composites. These products are favored for interior applications due to light weight, ease of work, and good finish quality.

Key properties include non-combustibility and the ability to improve fire resistance because the water of crystallization is released as heat is applied, providing a lag in heating of underlying structures. Gypsum also offers good acoustic properties and relatively low thermal conductivity. However, gipsbaserte produkter are sensitive to moisture and can deteriorate in damp conditions unless they are specially formulated with moisture resistance or reinforcement. They are generally not structural materials and are used to finish or protect walls and ceilings rather than bear loads.

Environmental and production aspects: gypsum can be mined or sourced as recycled material, such as flue-gas desulfurization (FGD) gypsum. Gypsum products typically have lower embodied energy than cement-based materials and can be recycled into new gypsum products at end of life.