What is the production sampling method called where a small pile is mixed from two directions before being back dragged into a sample pad?

The production sampling method described involves creating a small pile from two different directions before it is back dragged into a sample pad. This method is known as a "cross-mixed sample." In this technique, mixing from two directions helps ensure a more representative sample by minimizing the risk of segregation and ensuring that the sample reflects the overall material being processed.

Mixing the sample in this manner is essential as it reduces discrepancies that might arise due to variations within the pile of aggregate or mixture. This method is valuable in obtaining a consistent and uniform sample for testing, which ultimately contributes to the quality control and assurance processes in aggregate production and asphalt paving operations.

The other methods mentioned, such as "truck dump," typically refer to sampling directly from the location where the material is unloaded, while "pad dump" might imply a less thorough sampling method without the mixing step that facilitates homogeneity. In contrast, the cross-mixed sample technique is more rigorous in ensuring the integrity of the sample collected.