Why is the resilient modulus test important in aggregate base evaluation?

The resilient modulus test is crucial in aggregate base evaluation because it assesses the stiffness of aggregates under load repetition. This property is important for determining how well the aggregate can handle traffic loads over time without undergoing permanent deformation. By analyzing the resilient modulus, engineers can predict how the material will perform under repeated stress, which is particularly relevant for pavement design and analysis.

The stiffness indicated by the resilient modulus influences decisions related to the thickness of pavement structures and can impact overall durability, affecting maintenance and lifecycle costs. Understanding the behavior of aggregates under these loading conditions helps ensure that the chosen materials will provide the necessary support and performance in real-world applications.

Moisture content measurement, cost evaluation, and aggregate size determination are all important factors in the overall evaluation of construction materials. However, they do not directly inform about the mechanical behavior of the aggregates under working conditions, which is why the resilient modulus test specifically focusing on stiffness is critical for assessment in this context.