When placing the sample in the basket, use a small tamping rod to consolidate the material so that it occupies approximately 1/2 the height of the basket.

When placing the sample in the basket, use a small tamping rod to consolidate the material so that it occupies approximately 1/2 the height of the basket.

• A. True
• B. False
• C. Not Applicable
• D. Cannot Determine

Answer: (B)

Consolidating the material with a tamping rod is about removing air voids and packing the sample so it fills the available volume consistently. The goal is to create a representative, uniform sample for the test, not to leave a large air space or under-fill the basket. If you only fill to about half the height, you would leave significant air pockets and a low-density region. This leads to variability in mass, density measurements, and how the solvent or binder interacts with the material, which can skew results. The tamping is used to eliminate voids and bring the material up to the specified fill level for the procedure (typically to the full height of the basket or to a defined mark), ensuring reproducible, accurate outcomes. In short, pack the sample so it occupies the required height of the basket without leaving large gaps, rather than stopping at half height.

Consolidating the material with a tamping rod is about removing air voids and packing the sample so it fills the available volume consistently. The goal is to create a representative, uniform sample for the test, not to leave a large air space or under-fill the basket.

If you only fill to about half the height, you would leave significant air pockets and a low-density region. This leads to variability in mass, density measurements, and how the solvent or binder interacts with the material, which can skew results. The tamping is used to eliminate voids and bring the material up to the specified fill level for the procedure (typically to the full height of the basket or to a defined mark), ensuring reproducible, accurate outcomes.

In short, pack the sample so it occupies the required height of the basket without leaving large gaps, rather than stopping at half height.