Civil Engineering - Concrete Technology - Discussion

5. 

Efflorescence in cement is caused due to an excess of

[A]. alumina
[B]. iron oxide
[C]. silica
[D]. alkalis
[E]. magnesium oxide.

Answer: Option D

Explanation:

No answer description available for this question.

S B said: (May 12, 2017)  
Lime, silica, iron oxide imparts strength, alumina quick setting, when alkalies in excess, causes efflorescence.

Disha Makvana said: (Oct 4, 2017)  
Alkalies like K20 and Na20 causes efflorescence is the white powdered material seems on the surface of the brick after immersed out from the water.

Parsolian said: (Oct 2, 2020)  
Due to the presence of N2O and K3O which is soda and potash emerge on the surface as the moisture vaporized.

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