Rheological Properties of Bituminous Binder Modified with Nigella Pulp Liquefied by means of Pyrolysis Method

Abstract

It is possible to improve the performance by means of modifying the mixtures through enhancing the properties of the materials used in paving or by adding some special substances. The modification process is carried out by adding the admixtures on specific rates and conditions into the binder or into the bituminous mixture on the mixture plant. By modifying the properties of the used bituminous materials the performance of both the binder and the mixture is tried to be improved.

Intense studies have been carried out in Turkey and the World, for rendering the bituminous hot mixtures more durable against the current road and weather conditions. For this purpose, modifications of bituminous mixtures have been started to use with the aid of chemical substances as vehicle tires, polypropylene, rubber, waste plastics, sulfur, etc. Besides the main purpose of achieving durability against the conditions of road and weather, reduction of production and maintenance costs is another purpose of these modifications. With this study, it has been aimed to modify bitumen by adding nigella pulp liquefied by means of pyrolysis method and to examine the effect of this admixture on the rheological properties of bitumen. The effects on the rheological properties have been determined with penetration, softening point, dynamic shear rheometer (DSR), rolling thin film oven test (RTFOT) and bending beam rheometer test (BBR).