What practice is used for sampling aggregate according to industry standards?

The practice of sampling aggregate according to industry standards is covered by ASTM D75, which specifically outlines the procedures for sampling aggregates. This standard provides guidelines on the proper methods for obtaining samples that represent the material being evaluated, ensuring that the samples collected are as accurate and representative as possible of the larger quantity of aggregate.

ASTM D75 details various techniques and considerations, such as the need to take samples from multiple locations and depths to avoid bias in the representation of the material. It emphasizes aspects such as sample size, techniques for sampling dry and wet aggregates, and procedures to minimize contamination. This ensures that the testing results obtained from the samples can reliably guide quality control and decision-making in construction projects.

Other options, while associated with testing and standards in different contexts, do not specifically address the practice of sampling aggregate material. ASTM C33 pertains to concrete aggregates, D698 is related to soil compaction tests, and sampling microbiological components would be unrelated to standard aggregate sampling practices. Thus, the use of ASTM D75 is the correct approach for sampling aggregate in this context.