Rheological properties of bitumen modified with pyrolytic carbon black

Pyrolytic carbon black (CBp), a by-product of scrap tyre pyrolysis, was blended with a 150/200 penetration grade bitumen at concentrations ranging from 5 to 30 wt%. The fundamental rheological properties of standard and modified bitumens as well as their classical characteristics were determined. The interactions between CBp and bitumen components using ESCA, i.r. and u.v. spectroscopy were investigated. The results indicate that pyrolytic carbon black can be used as a filler to reduce the influence of temperature on physical response characteristics of the mixtures. The addition of CBp in amounts of 5-30 wt% of the binder changed the rheological properties of the blends positively. Copyright (C) 1996 Elsevier Science Ltd.