Gypsum Plaster

PRODUCT : GYPSUM PLASTER OTHER NAME : PLASTER OF PARIS GRADE : BK-90 & BK-75 ( Higher Grade) DESCRIPTION : A group of cements which consist essentially of calcium sulfate and are produced by the partial dehydration of gypsum to the hemihydrate CaSO4• 1/ 2H2O. They usually contain additions of of various sorts. SPECIFICATIONS : PROPERTIES BK - 90 BK - 75 Purity 96% min. 96% min. Fe2O2 0.05% max. 0.05% max. SiO2 0.1% max. 0.1% max. Moisture 0.1% w / w max. 0.1% w / w max. Practical Water : Powder Ratio 90 - 120 : 100% w / w 75 – 90 : 100% w / w Mixing Time 0.5 – 2.0 minutes 0.5 – 2.0 minutes Initial ( knife) Setting Time 4 – 6 minutes 4 – 6 minutes Final ( Gilmore) Setting Time 19 – 23 minutes 19 – 23 minutes Compressive Strength 60.0 kg / cm2 80.0kg / cm2 Dry Bending Strength 35.0 kg / cm2 40.0 kg / cm2 Wet Bending Strength 20.0 kg / cm2 25.0 kg / cm2 Fineness 200 µ m / 150 µ m < 0.1% < 0.1% USES : a) Grade BK-90 ---for ceiling board casting, plaster board, school chalk and general coating. b) Grade BK-75 ( Higher Grade ) --- for high strength, delicate casting work such as molding, cornice, sculpture work. PACKING : 25kg PP Bag 25kg x 880 bags = 22MT / FCL ORIGIN : THAILAND