How many increments should be selected at a minimum during miniature stockpile sampling?

In miniature stockpile sampling, selecting a minimum of five increments is crucial to ensure that the sample accurately represents the entire stockpile. This approach allows for greater statistical validity by capturing variability within the material, which can be influenced by factors such as composition and moisture content.

By obtaining multiple increments, the technician can average the characteristics of the sampled material, reducing the influence of any anomalies or localized variations. This method enhances the reliability of the laboratory test results, which is essential for determining the suitability of the aggregate base for construction purposes. Therefore, the recommendation of selecting five increments serves to ensure that the sample is both homogeneous and representative, aligning with best practices in aggregate testing.