ASTM D6373-21a PDF Download

ASTM D6373-21a is a standard specification for performance-graded asphalt binder. This standard defines the grading system for asphalt binders based on their performance characteristics. The grading designations are determined by the average seven-day maximum pavement design temperature and the minimum pavement design temperature.

The asphalt binder used in this specification is derived from crude petroleum and can be modified with suitable organic materials to enhance its performance. These modifiers can be virgin or recycled materials that are dissolved, dispersed, or reacted in the asphalt cement.

The critical low cracking temperature of the asphalt binder is determined using a combination of test procedures specified in this standard. The standard also references other specifications for asphalt cements graded by penetration at 25°C and viscosity at 60°C.

It is important to note that this specification incorporates the use of LTPPBind, an online tool that provides information on asphalt binder performance. This tool can be accessed through the provided link for further information. Additionally, AASHTO R29 provides non-mandatory information for determining the performance grade of an asphalt binder.