Study of road bitumens operational properties modified with phenol-cresol-formaldehyde resin

Abstract

Phenol-cresol-formaldehyde resin (PhCR-F) was obtained using minor liquid products of coal coking by means of a relatively inexpensive method. It is shown that petroleum road bitumens, to which 1.0 wt % PhCR-F is added, in terms of basic physical and mechanical parameters comply the requirements of the regulatory document for bitumens modified with adhesive additives. Research of the operational properties of these modified bitumens as a binding material for asphalt concrete is described. It has been proven that modified bitumen can store stable properties during their application (counteraction to technological aging). The interaction of bitumens modified by PhCR-F with the surfaces of mineral materials, which occurs during the creation of asphalt concrete coatings, was studied. It was shown that the addition of 1.0 wt % PhCR-F to road bitumen significantly improves the adhesion of the binder to the mineral material and increases the hydrophobicity of such a coating.