Which material's specification is determined by mass percent of wear test results?

The specification of aggregate materials is often determined by mass percent of wear test results, primarily through standardized tests such as the Los Angeles abrasion test. This test evaluates the durability and wear resistance of aggregate by simulating the action of traffic over time. The results provide a quantifiable measure of how much material is lost through abrasion, which is directly related to the performance of the aggregate in construction applications.

Aggregates with lower wear percentages are desirable because they indicate greater resistance to wear and tear, contributing to the longevity and stability of the final product, whether it be in concrete, asphalt, or other applications. The mass percent loss provides a crucial parameter for ensuring that the chosen aggregates meet the requirements for different construction projects, enhancing the overall quality and sustainability of structures.

As for the other materials listed, while soil, concrete, and asphalt do have wear characteristics that can be tested, their specifications are influenced by a variety of factors beyond just mass percent wear test results, such as compaction, strength, and moisture content. Therefore, the mass percent of wear test results is particularly relevant and widely recognized in the context of aggregate materials.