Accelerating the setting of calcined gypsum

Details Accelerating the setting of calcined gypsum Accelerating the setting of calcined gypsum

C - Chemistry, Metallurgy

04

B

25/104, 261/73

C04B 28/14 (2006.01)

Patent

CA 1090837

COMPOSITION FOR ACCELERATING THE SETTING OF CALCINED GYPSUM AND THE PRODUCT FORMED THEREBY ABSTRACT OF THE DISCLOSURE A composition for accelerating the setting of an aqueous calcined gypsum slurry, the composition comprising finely ground calcium sulfate dihydrate and a lignosulfonate. The composition, when added to an aqueous calcined gypsum slurry, accelerates the setting process and shortens the set time period as determined by the temperature rise set test procedure. The composition is useful for making gypsum wallboard.

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