Transportation Engineering Experiments Posted on January 26, 2014 by CIVILENGINEERSPK — No Comments ↓ EXPERIMENT NO. 12 SOFTENING POINT OF BITUMEN (RING-AND-BALL APPARATUS). [ASTM Designation: D 36-76, AASHTO Designation: T 53-89] Share this:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)