Civil Engineering - Concrete Technology - Discussion

48. 

Pick up the correct statement from the following:

[A]. An increase in water content must be accompanied by an increase in cement content
[B]. Angular and rough aggregates reduce the workability of the concrete
[C]. Large size aggregates increase the workability due to lesser surface area
[D]. The slump of the concrete mix decreases due to an increase in temperature
[E]. All the above.

Answer: Option E

Explanation:

No answer description available for this question.

Bina Rai said: (Jan 27, 2014)  
How is this answer option E true. Can any one answer me?

Aamir said: (Mar 7, 2020)  
Option C is not true. The rest remaining right.

Rohan Mukherjee said: (Oct 20, 2020)  
Please explain option C.

Reshika said: (Jan 4, 2021)  
Size is inversely proportional to surface area. When the aggregate are broken down to smaller sizes, more surface area is exposed. Thus, for the same volume, large sized aggregate have lesser surface area, thereby lesser wetting area, leading to more free water which in turn improves workability.

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