General Knowledge - General Science - Discussion

1. 

Which is/are the important raw material(s) required in cement industry?

[A]. Gypsum and Clay
[B]. Clay
[C]. Limestone and Clay
[D]. Limestone

Answer: Option C

Explanation:

No answer description available for this question.

Dr. Girish H N said: (Dec 6, 2012)  
Gypsum is also using for the manufacture of cement.

Sailu said: (Mar 5, 2013)  
Lime stone is calcium carbonate used to cement manufactured.

Mahesh said: (Oct 10, 2013)  
Lime stone and gypsum are used for manufacture of cement.

Mir Sharik said: (Jan 17, 2014)  
Limestone is calcium carbonate{CaCo3} and clay is the general term including one or more clay combinations with traces of metal oxides and organic matter.

Ashokan said: (Jan 30, 2014)  
Gypsum is the important role. Whenever the percentage of gypsum increased the hardness will be increased.

Siva said: (Feb 24, 2014)  
Gypsum is also used in cement manufacture.

Hamza Saleem said: (Nov 6, 2015)  
Limestone is calcium carbonate and gypsum is also used in making cement.

Prashant Wakde said: (Nov 28, 2016)  
Both are very useful in manufacturing the cement.

Shubham Gaurav said: (Dec 9, 2016)  
Gypsum is also used in cement manufacturing but why the answer is option c?

Dimpal Sharma said: (Feb 21, 2017)  
The most common raw meterial used in cement production are;

* Limestone (supplies the bulk of the lime).
* Clay, marl or shale (supplies the bulk of the silica, alumina and ferric oxide).
* Other supplementary materials such as sand, fly ash/pulverised fuel ash (PFA), or ironstone to achieve the desired bulk composition.

During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process. Gypsum is added to control the "setting of cement". Gypsum is a mineral and is hydrated calcium sulfate in chemical form.

Neal.B.V said: (Sep 16, 2017)  
Limestone and gypson both are highly used in making cement.

Rajendra Prasad said: (Sep 23, 2017)  
Limestone and clay is main raw materials cement but gypsum add reduced rating of cement.

Sachin said: (Aug 26, 2019)  
Gypsum is also used to decrease solidity properties of cement.

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