Question

the aggregate should be oven dried before sieving justify​

Answer 1

Answer:

Electricity

Explanation:

Because oven donot work without electricity

Answer 2

Answer:

The aggregate should be oven-dried at high temperature before sieving to prevent lump formation of the fine particles due to moisture content, which might clog the fine sieve holes.

Explanation:

• Oven drying helps to remove the moisture and makes the aggregate dry.
• Oven drying of aggregate is also done to determine the moisture content of the aggregate like soil and this measurement is very useful while determining the proportions in mixing concrete.
• This is done by first weighing the sample, then heating the weighed sample it in an oven at high temperature, and then weighing the dried sample again.
• The differences in the weight before and after heating will provide the moisture content.