Is it acceptable to run a wash sieve on a section of a sample that has been screened over a sieve smaller than the nominal maximum size of the aggregate?

• A. True
• B. False
• C. Only if the sample size is minimal
• D. Only for specific aggregates

Answer: (A)

Running a wash sieve on a section of a sample that has been screened over a sieve smaller than the nominal maximum size of the aggregate is considered acceptable. The primary purpose of using a wash sieve is to remove fine particles from the aggregate sample, which can help in assessing the quality and grading of the material.

When a sample is screened through a sieve smaller than the nominal maximum size, it is still possible to perform an effective wash sieve analysis. The smaller sieve allows for the separation of finer materials, which can provide insights into the aggregate's composition and performance characteristics. This approach is particularly useful in determining how much of the fine material might affect further processing, such as mixing in concrete or asphalt applications.

It is important to note that while performing this process is acceptable, proper care should be taken to ensure that the results are interpreted correctly in the context of the specifications and requirements of the project. The other options suggest conditions or restrictions that do not apply broadly in this scenario, making the direct acceptance of this method the most straightforward approach for evaluating aggregates.