What type of test measures the flow of asphalt at elevated temperatures?

The Brookfield Viscosity Test is specifically designed to measure the viscosity of materials, including asphalt, at elevated temperatures. In this process, a spindle is rotated in the asphalt sample, and the resistance to the flow is measured, which provides a direct correlation to the material's viscosity. This is crucial for understanding how asphalt will behave during mixing and application when subjected to high temperatures.

The importance of using this specific test lies in the fact that viscosity significantly affects both the workability of asphalt and its performance in the field. By measuring it at elevated temperatures, you gain insights into how the asphalt mixture will perform during the paving process and under varying thermal conditions.

While other tests such as the dynamic shear rheometer test measure the rheological properties of asphalt under specific conditions, they serve different purposes and may not focus solely on the flow characteristics at high temperatures as the Brookfield test does. The bending beam rheometer test evaluates the low-temperature cracking potential of asphalt mixtures, and the rotational viscometer test is also often used but caters to specific analyses that may not align directly with the premise of measuring flow at elevated temperatures in the context of the given question.