Fremstilling af cementholdig plade

摘要

A method of accelerating the setting reaction of calcium sulphate hemihydrate and water comprises the steps of mixing water and calcium sulphate hemihydrate to produce a slurry, adding an accelerator to said mixture, and applying ultrasonic energy to said mixture. Application of ultrasound to the plaster slurry accelerates crystallization and thus reduces the setting time. A further benefit is reduced density of the wall boards.