Modification Mechanism of Asphalt Modified with Rock Asphalt and Styrene-Butadiene Rubber (SBR)

Table 3

Technical properties of SBR 1502.

Property	Test result	Technical requirement	Specification
Content of butadiene (%)	70	68–71	GB12824-91
Mooney viscosity	52	50–53	GB12824-91
Fineness with the mesh number of 10 (%)	100	Mesh number of 10 or 20	GB12824-91
Styrene content (%)	23.5	23.5	GB12824-91
Volatilization (%)	0.2	≤0.8	GB12824-91
Ash content (%)	7.5	≤8	GB12824-91
Tensile strength	26.5	≥26	GB-8655-88
Elongation at break (%)	540	≥500	GB-8655-88
Soap content (%)	0.15	≤0.5	GB12824-91
Content of organic acid (%)	6.3	6.3	GB12824-91