Road Performance and Ice-Melting Characteristics of Steel Wool Asphalt Mixture

Table 1

Basic index of asphalt.

Technical index		Unit	Requirement	Test value	Testing standard
Penetration (25°C, 5 s, 100 g)		0.1 mm	40–60	58	T0604-2011
Penetration index		—	≥0	0.035	T0604-2011
Softening point		°C	≥60	68	T0606-2011
Ductility (5^oC)		cm	≥20	31	T0605-2011
Brookfield viscosity (60^oC)		Pa·s	≤3.0	2.13	T0625-2011
Elastic recovery (25^oC)		cm	≥75	78.0	T0662-2000
Flash point		°C	≥230	296.8	T0611-2011
Storage stability		°C	≤2.5	2.0	T0611-2011
Rolling thin film oven test	Quality change	%	±1.0	−0.150	T0609-2011
	Penetration ratio	%	≥65	77.2	T0604-2011
	Ductility (5 cm/min, 10°C)	cm	≥15	16	T0605-2011