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What is gypsum

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What is gypsum
inEngg. Materialsby

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Gypsum is used to delay the setting time or harden time of cement
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Gypsum is a white or colourless mineral. Cement contain a gypsum. If gypsum is not in cement, when water add to cement, it will become a harden material with in less time. So, gypsum used for set control of cement.
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