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Composition and Manufacture and Uses of Cement

Among the fol...

Question

Among the following components of cement which is present in highest amount?

A

C a_{2} S i O_{4}

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B

C a_{3} S i O_{5}

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C

A l_{2} O_{3}

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D

C a_{3} A l_{2} O_{6}

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Solution

The correct option is D $C a_{3} S i O_{5}$
Composition of cement depends upon its type.
Portland cement is most common kind and contains 51% tricalcium silicate, 24% of dicalcium silicate and 6% of tricalcium aluminate.
Hence, option $B$ is correct.

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Q. In portland cement, the percentage of

A l_{2} O_{3}

Q. Match the following items in column I with the corresponding items in column II.

	Column I		Column II
(i)	$N a_{2} C O_{3} .10 H_{2} O$	(A)	Portland cement ingredient
(ii)	$M g (H C O_{3})_{2}$	(B)	Castner Keller process
(iii)	$N a O H$	(C)	Solvay process
(iv)	$C a_{3} A l_{2} O_{6}$	(D)	Temporary hardness

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