What does a "grade" in terms of asphalt signify?

A "grade" in terms of asphalt represents a classification system that categorizes asphalt based on its viscosity and performance properties. This classification is crucial for ensuring that the asphalt mixture meets specific engineering requirements and performs adequately under various environmental and load conditions. The viscosity of asphalt is indicative of how it will behave during application and over time, impacting its durability and suitability for different climates and conditions.

Understanding asphalt grading helps engineers and contractors select the right type of asphalt for a given project, which is essential for achieving the desired lifespan and performance of the paving. This system provides guidance for the temperature at which the asphalt should be applied, as well as its expected behavior under traffic loads, thus contributing to the overall effectiveness of road construction and maintenance.