1.Description of the product 

Paving grade bitumen 50/70 can be used primarily for asphalt concrete (AC) and stone mastic asphalt (SMA) in wearing courses, provided that the mixture complies with the requirements concerning resistance to rutting. The use of 50/70 bitumen for the production of base and binder courses also requires the verification of the mixture’s resistance to rutting. The use of 50/70 bitumen for the production of any layer of pavement designed to carry heavy, slow traffic (slow lanes, approaches to crossroads, etc.) is not recommended.​

 

2.Properties

Reference standard: EN 12591:2009

Property	Unit	Test Method	Requirement
Penetration at 25°C	0.1 mm	EN 1426	50-70
Softening point​	°C	EN 1427	46-54​
​Resistance to hardening at 163°C		EN 12607-1 (RTFOT method)	-
Retained penetration​	%​	​EN 12607-1​ (RTFOT method)	≥ 50
Increase in Softening point	°C	EN 12607-1​ (RTFOT method)	≤ 9
Change of mass* (absolute value)	​%	​EN 12607-1​ (RTFOT method)	≤ 0.5
Flash point	°C	EN ISO 2592	≥ 230​
Solubility	% (m/m)	EN 12592	≥ 99.0

* Change of mass may be a positive or negative value