Civil Engineering - Concrete Technology - Discussion

The grading of aggregates in concrete affects the water requirement for a given workability. The water requirement is directly proportional to the surface area of the aggregates. The finer the aggregates, the greater the surface area, and the higher the water requirement to achieve the desired workability.

Therefore, the grading requiring the least amount of water is the one that gives the least surface area for the given amount of cement and aggregates.

The answer should be B. Because coarser aggregate have less surface area and required less mixing water for same degree of workability.

When the surface area is least, it will obviously require least amount of water.

So, from my opinion, option B is correct.

The given answer, "greatest surface area for the given cement and aggregates", is correct.

Least surface area requires less water.

The Right answer is B.

Yes it's B.

How coarse aggregates surface area is less?

Fine aggregates surface area is less.

Least surface area required more water.

The right answer is B.

The Given answer is correct.

It says "least amount of water which gives greatest surface area for given amount of cement and aggregates.