Calcium sulfate binders are required to have widely varying properties to meet technical and economic requirements. In particular, it has to be possible to vary the workability time and the time of the onset of stiffening of the binders over a period ranging from a few minutes to several hours. To cope with these requirements it is necessary to use additives to regulate the setting.
Acceleration of the setting is of crucial importance in the production of gypsum wallboard. Modern plants for producing gypsum wallboard can reach manufacturing speeds of up to 180 m per minute. The...