DETAILED MANUFACTURING PROCESS OF CEMENT

DETAILED MANUFACTURING PROCESS OF CEMENT

Cement is a combination of two materials

Calcareous materials 

+ 

Argillaceous Materials 

=

CEMENT

“The ingredients are mixed in the ratio (2:1) of about two parts of calcareous materials to one part of argillaceous materials”

Calcareous Materials: Calcareous Materials are compounds of calcium and magnesium. Limestones are common calcareous material used in manufacturing cement.

Argillaceous Materials: Argillaceous Materials are mainly silica, alumina and oxides of iron

These minerals are used in different form as per the availability of the minerals. The table shows the raw materials for Portland cement manufacture

 .

LCETED TRIVIA

Founder Of Cement = Joseph Aspdin

He Obtained Patent For Cement = October 21st, 1824.

Place = Portland, England

Joseph Aspdin invented Portland cement by burning finely ground chalk and clay in a kiln until the carbon dioxide was removed. It was named “Portland” cement because of it resembled the high-quality building stones found in Portland, England

MANUFACTURING PROCESS

The raw materials such as limestone or chalk and shale or clay maybe mixed either in dry conditioner or in wet condition.

The process is accordingly known as,

1.  DRY PROCESS

2.  WET PROCESS

DRY PROCESS

WET PROCESS

NOTES

1)  The ingredients are mixed in the Ratio (2:1) of about two parts of calcareous materials to one part of argillaceous materials

2)  The dry powder or the wet slurry is then burnt in a rotary kiln at a temperature between 1400 degree C to 1500 degree C.

3)  Gypsum is added 2 to 3% as Retarding Agent to control the “setting of cement”. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing.

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