Gypsum uses

Mixture of clay and gypsum used to reduce flammability of theater curtains. 1638... 

Kurabo A flue-gas desulfurization process involving scrubbing with an acidic solution of ammonium sulfate. The product is gypsum. Used in Japan. 

Compost greasy. Gypsum quantity too low. Starting materials too old. Add more gypsum. Use only fresh, undecomposed starting materials. 

Terra alba ter-o al-bo n. CaS04 2H20. A finely powdered form of gypsum, used as a filler. Another name for gypsum or calcium sulfate. 

Little work has been done on the TLC of bufadienolides. Zelnik and Zin [187, 188] have separated on silica gel-gypsum, using customary solvents like ethyl acetate, ethyl acetate-cyclohexane (40 + 80) or (80 + 20), ethyl acetate-acetone (90 + 10) ethyl acetate-methanol (90... 

Table 1. Proportions of clinker and red gypsum used in the three cements formed for this study. The characteristics of the commercial cement taken as reference are also given...

In addition, one very important aspect to take into account in cement making is the grain size of the different materials used in its formation. Figure 6 shows the granulometry of the clinker and the red gypsum used in the mixtures formulated for analysis in this work. 

In Table 7, the reference expansion values for the three red gypsum cements, as well as for the commercial cement, are shown. The results show that the presence of red gypsum in the cements formed does not cause any significant modification in its expansion behavior in comparison to the commercial cement, irrespective of the proportion of red gypsum used as an additive. And more important, the values comply with Spanish legislation, which indicates that the reference value for expansion obtained through the le Chatelier test for any cement should be lower than 10 mm... 

Gypsum is consumed in large quantities worldwide, principally for use in the construction industries. Also, some of gypsum is used in agricultural applications. More information about gypsum uses in agriculture and industry is available at http //www.usagypsum.com. 

Calcium sulfate (CaSOJ. Also known as gypsum, used to make plaster of paris. Gypsum will precipitate and form scale in boilers when concentrated. 

Figure 5.4 (a) DTG and (b) weight loss recorded by TGA for gypsum using 20 mg of sample. A heating rate of 5 or 20°C/min and open AljOj vessels or tightly closed aluminium vessels with a 50 pm hole in the lid were used. 

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