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Liquid asphalt requires a certain minimum temperature to ensure proper workability and adherence to surfaces. Typically, the minimum temperature where asphalt remains in a liquid state, allowing for effective application and compaction, is around 40 degrees Fahrenheit. At temperatures below this threshold, the viscosity of the asphalt increases, making it harder to work with and potentially leading to issues such as inadequate bonding with aggregates and the pavement surface.

In addition to facilitating workability, maintaining the right temperature is crucial for ensuring proper performance characteristics of the asphalt mix. It helps in achieving the desired flowability during installation and promotes better compaction, which is essential for the longevity and durability of the asphalt surface.

Thus, the selection of 40 degrees Fahrenheit addresses these critical aspects of asphalt application, aligning with industry practices that prioritize effective construction methodologies.