Addition of gypsum to cement:

reduces setting time of cement

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produces very light colour cement

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increases setting time of cement

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shining surface is formed

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Solution

The correct option is C increases setting time of cement
When cement is mixed with water, it becomes hard over a period of time. This is called setting of cement. Gypsum is often added to cement to prevent early hardening or “flash setting”, allowing a longer working time. Gypsum slows down the setting of cement so that cement is adequately hardened.

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Similar questions

By adding gypsum to cement
(a) setting time of cement becomes less
(b) setting time of cement increases
(c) colour of cement becomes light
(d) shining surface is obtained

Q. 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.

Q. Consider the following statements regarding 'setting of cement'.
1. Low-heat cement sets faster than OPC.
2. Final setting time decides the strength of cement.
3. Initial setting time of Portland Pozzolana is 30 minutes.
4. Air-induced setting is observed when stored under damp conditions.
5. Addition of gypsum retards the setting time.
Which of the above statements are correct?

Q. The setting time of cement can be increased by the addition of

Q. The setting time of cement is determined using

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