What are ASTM standards relevant to?

The correct choice highlights that ASTM standards encompass procedures for quality testing of aggregates. ASTM International, formerly known as the American Society for Testing and Materials, develops and publishes technical standards for a wide range of materials, including aggregates used in construction. These standards outline specific methodologies for evaluating the physical and chemical properties of aggregates, ensuring they meet industry requirements for durability, performance, and safety.

By adhering to these established standards, technicians can consistently produce reliable and high-quality materials, which are critical for the integrity of construction projects. Adopting these testing procedures not only promotes uniformity in the evaluation of aggregates but also helps in maintaining compliance with regulations and specifications set by governing bodies, such as those related to highway and infrastructure construction.