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Oxides of Group 16

As per specif...

Question

As per specifications, the initial setting time of ordinary portland cement should not be less than

A

10 minutes

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B

20 minutes

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C

30 minutes

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D

60 minutes

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Solution

The correct option is C 30 minutes
Initial setting time should not be less than 30 minutes and final setting time should not be greater than 600 minutes as per IS 12269.

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Q. According the IS specification, the compressive strength of ordinary Portland cement after three days should not be less than :

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^{2}

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Q. The compound which is largely responsible for initial setting and early strength gain of Ordinary Portland Cement is

Q. As per IS 4031 : 1988, the heat of hydration of low-heat Portland cement for 7 days should not be more than _______ calories per gram.

Q. Which of the following pairs in respect of Ordinary Portland Cement (OPC) are correctly matched ?
1. Initial setting time 30 minutes
2. Final setting time 10 hours
3. Normal consistency 10%

Select the correct answer using the codes given below:

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