Effects of carbon black on the anti aging, rheological and conductive properties of SBS/asphalt/carbon black composites

The asphalt binders containing Styrene-butadiene-styrene copolymer (SBS) triblock copolymer filled three kinds of carbon black (CB, including N330, N650 and N990) were experimentally investigated in order to examine the effects of CB on the physical properties, storage stability, aging, rheological properties, electrical resistivity and thermal conductivity. Experimental results indicated that all of selected CB can improve the high temperature properties, anti aging, thermal conductivity of SBS modified asphalt binder (SBSMA), but it decreases the storage stability and electrical resistivity. Nonetheless thermal susceptibility is increased after CB added, especially N990. These effects increase with increasing CB content. N330 is much more effective than for change of properties at the same contents because of the high oil absorption and Cetyltrimethylammonium Bromide (CTAB) surface area. Therefore, the asphalt binder with better anti aging, rheological properties, electrical conductivity and thermal conductivity is novel road functional materials to meet two requirements as conductivity materials and road materials at the same time.