How many parts are there in the procedure for determining the gradation or partial size distribution of an aggregate?

The correct answer is that there are five parts in the procedure for determining the gradation or partial size distribution of an aggregate. This process is crucial in ensuring that the aggregate used in construction projects meets the required specifications for performance and durability.

The five parts typically include:

1. Sample Preparation: Properly preparing the sample is essential to ensure that it represents the material being tested. This might involve processes such as drying or breaking down large clumps.

2. Sieve Selection: Choosing the correct sieves is vital for the size distribution analysis. The selected sieves should cover the range of sizes present in the aggregate.

3. Sieving Process: The actual sieving involves placing the prepared sample on the sieves and mechanically shaking them to allow the aggregate to pass through the openings. Each sieve collects material of different size fractions.

4. Weighing: After sieving, the amount of aggregate retained on each sieve needs to be accurately weighed to determine the mass of each size fraction.

5. Calculating Percentages: Finally, the data collected from weighing each fraction is used to calculate the percentages of each size relative to the total sample, giving a complete picture of the gradation.

By following these