Gypsum is added to clinker during cement manu | vedclass

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Question

(A) During the manufacture of cement,$2-3\%$ of gypsum $(CaSO_4 \cdot 2H_2O)$ is added to the clinker. This addition is done to slow down the process

Vedclass · Accepted Answer

decrease the rate of setting of cement

Vedclass · Answer

(A) During the manufacture of cement,$2-3\%$ of gypsum $(CaSO_4 \cdot 2H_2O)$ is added to the clinker. This addition is done to slow down the process of hydration of the tricalcium aluminate $(C_3A)$,which is responsible for the initial setting of cement. By slowing down this reaction,the setting time of the cement is increased,allowing sufficient time for mixing and placing the concrete.

List-$I$	List-$II$
$a$. $Ca(OCl)_2$	$i$. Antacid
$b$. $CaSO_4 \cdot \frac{1}{2} H_2O$	$ii$. Cement
$c$. $CaO$	$iii$. Bleach
$d$. $CaCO_3$	$iv$. Plaster of Paris

Gypsum is added to clinker during cement manufacture to:

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Match List-$I$ with List-$II$.

List-$I$ List-$II$

$a$. $Ca(OCl)_2$ $i$. Antacid

$b$. $CaSO_4 \cdot \frac{1}{2} H_2O$ $ii$. Cement

$c$. $CaO$ $iii$. Bleach

$d$. $CaCO_3$ $iv$. Plaster of Paris

Choose the most appropriate answer from the options given below:

Which of the following ores contains both magnesium and calcium?

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