Using Pyrolyzed Carbon Black (PCB) from Waste Tires in Asphalt Pavements (Part II: Asphalt Binder and Test Road) - Final Report Author(s): Zeng, Yongdong & Lovell, C.W., Purdue University Origin: Indiana Date: February, 1996 Categories: Performance Key Words: Scrap tires, pyrolysis of scrap rubber, carbon black, asphaltic binder Summary: Scrap tires derived from automobiles have become a large environmental problem in the United States. In this study, research is carried out to investigate the potential use of tire-derived pyrolyzed carbon black from scrap tires as an asphalt cement modifier. The asphalt cements used in this research were AC10 & AC20. Penetration and softening point tests were performed to obtain the consistency of the asphalt cements. The pyrolyzed carbon black, as provided by Wolf Industries, was combined with the asphalt cement in the following percentages: 5%, 10%, 15% & 20%. Penetration softening point and ductility tests were performed to determine the temperature susceptibility of the modified binder as altered by the pyrolyzed carbon black.