When assessing asphalt compaction after trenching, which ASTM standard is relevant for cohesionless materials?

The correct choice, ASTM D4253, is significant for assessing the compaction of cohesionless materials such as gravel and sand when evaluating the density of these materials in the context of asphalt compaction after trenching. This standard, formally titled "Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table," is specifically designed to handle materials that do not exhibit cohesive properties.

Using this standard helps to establish the maximum density that can be achieved under specified conditions, which is crucial for effective compaction in asphalt applications. This information is important because achieving proper density is integral to the durability and performance of the asphalt surface, especially after trenching activities that may disturb previously compacted materials. By applying ASTM D4253, professionals can ensure that cohesionless materials meet the necessary specifications for compaction, leading to a stable and reliable pavement structure.

Understanding this standard’s application helps professionals deploy accurate compaction techniques that adhere to established guidelines, ensuring the longevity and performance of the asphalt infrastructure.