Softening point of asphalts and TAR pitches(Ring & Ball Method )

           This test is of importance , because it is necessary to be sure that the viscosity of a given bitumen is suitable at the temperature used in manufacture, also , at the temperature likely to be encorentered on the road , the following method covers the determination of the softening point o bitumen having softening point in the ranges of 80 c or below by means of a ' ring and ball apparatus' . R RING AND BA

 BA

Standard : ASTM 36-76.

Test - equipment 

LL METHOD

• Ring and ball apparatus

Accessories:

• Two brass rings
• Two steel balls 9.5 mm dia.
• Two brass ball centering guides
• Glass vessel
• Glass thermometer -2 +80°C.