Civil Engineering - Concrete Technology - Discussion

1. 

Concrete gains strength due to

[A]. chemical reaction of cement with sand and coarse aggregates
[B]. evaporation of water from concrete
[C]. hydration of cement
[D]. All the above.

Answer: Option C

Explanation:

No answer description available for this question.

S.Shah said: (Nov 26, 2013)  
Please detail of hydration of cement?

Rohit Kumar said: (Jul 2, 2016)  
The reaction b\w cement and water is called hydration and heat produce during hydration is called heat of hydration thats why concrete gains strength due to hydration of cement.

Tricksy said: (Dec 2, 2016)  
Answer should be all the above.

Sandy said: (May 19, 2017)  
I think it should be option D.

J Madhavan said: (Oct 12, 2017)  
Answer should be D. Because of chemical reactions between cement and water.

Manik said: (Oct 26, 2017)  
A and C is correct.

Suraj Shrestha said: (Dec 26, 2017)  
Aggregate are inert material. They don't take part in chemical reaction.

Minesh Rathore said: (Jan 6, 2018)  
In concrete aggregate and sand are also called non-reactivate materials so option C is the only correct answer.

Viru Kapoor said: (Apr 3, 2018)  
The chemical reaction of cement is only with water (called as hydration of cement).

And how evaporation can help in gain strength.

Only C option is correct.

Asif Wazir said: (Jan 21, 2019)  
Option C is correct because in option A the cement doesn't chemically react with aggregates. And in option B the evaporation from concrete in submerged structures doesnt occur but strength is gained. And the hydration of cement is the only correct option.

Rahul said: (Jul 22, 2019)  
Only C is the right answer because when we add water with cement chemical reaction will start between water and cement. This process is known as the heat of hydration. And this is also known as an exothermic reaction. In this reaction, heat is liberated so this reaction name is the heat of hydration.

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