What is the specific formula for % passing through the 200 sieve?

The specific formula for % passing through the 200 sieve is expressed as the result of the total weight of material that has passed through the sieve compared to the extracted aggregate weight. In this context, the formula combines both the weight of material lost during washing (typically finer particles) and the weight of material retained by the 200 sieve. This ensures that the calculation reflects the total amount of finest material in relation to the whole batch.

Using the weight lost from the wash along with the weight retained provides a comprehensive view of what is retained and what is washed away. The formula effectively shows the relationship of these weights to the total weight of the extracted aggregate. This calculation is vital for determining the right gradation of the mix and ensuring compliance with specifications, as the percentage of material passing through the 200 sieve can significantly affect the performance characteristics of the asphalt.

This thorough approach, accumulating both retained and lost weights, results in a more accurate assessment of the aggregate's properties which are key in asphalt mix design.