GK
BASIC GENERAL KNOWLEDGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which substance is used to retard the setting action of cement?
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CaO
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AlO
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CaSO.2HO
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NaO + KO
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Explanation:
Detailed explanation-1: -Answer: Option C Solution: CaSO4 . 2H2O (Gypsum) is added to cement clinker to retard setting action of cement.
Detailed explanation-2: -Sugar water acts as a retarder for the curing of concrete.
Detailed explanation-3: -Gypsum plays an important role in controlling the rate of hardening of the cement. It is added to concrete and cement to slow down the drying time as cement dries quickly.
Detailed explanation-4: -Assertion :Gypsum is added to powdered clinkers to get cement. Reason: Addition of gypsum to clinker decreases its setting time and thus cement hardens readily on mixing with water.
There is 1 question to complete.