SOFTENING POINT OF ASPHALT AND PITCH
GENERAL
Asphalt and pitch do not go through a solid-liquid phase change when heated, and therefore do not have true melting points. As the temperature is raised, they gradually soften or become less viscous. For this reason, the determination of the softening point must be made by an arbitrary but closely defined method, if the test values are to be reproducible. Softening point determination is useful in determining the consistency as one element in establishing the uniformity of shipments or sources of supply.
