Gypsum fibreboard (gypsum fibreboard production)

Emissions generated by the activity within the product supply chain as described in ecoinvent v3.10. The product "gypsum fibreboard" represents gypsum fibreboard produced 100% from natural gypsum (no FGD). Gypsum fibre boards are produced in the following way: The gypsum is mixed with water fibres and additives and evenly spread on the belt of a calender. The board is pressed and when the gypsum is set the edges are cut and the surplus water is removed by drying for about one hour in a kiln. Finally the boards are cut and packed. Gypsum fibre board consists of gypsum with 15-20% cellulose fibres. This product has a density of 1000 - 1250 kg/m3 and a thermal conductivity of 0.36 W/mK. Gypsum boards have good sound-absorbing properties and because of the constitutional water they show a good fire resistance and consequently often are used where these properties are required. The cut-off classification is allocatable product. The activity type is ordinary transforming activity. The reference product amount is 1.