The ductility test (Figure 1) measures asphalt binder ductility by stretching a standard-sized briquette of asphalt binder (Figure 2) to its breaking point. The stretched distance in centimeters at breaking is then reported as ductility. Like the penetration test, this test has limited use since it is empirical and conducted at only one temperature (25° C (77° F)).

Ductility test
Figure 1. Ductility test.

Ductility samples
Figure 2. Ductility samples.

Standard Test Methods

  • AASHTO T 51 and ASTM D 113: Ductility of Bituminous Materials