This paper describes the results of a research studying the fatigue resistance performances of bituminous concretes for base courses and wearing courses (traditional and SMA type), made with steel slags and bitumen modified with crumb rubber or SBS polymers. The fatigue behaviour was also investigated in conditions of long-term ageing, in order to evaluate the effectiveness of the modification with crumb rubber using the wet process in reducing the fatigue damage in heavily oxidized mixtures. The experimental data, obtained from four point bending tests (4PBT), were interpreted both with the classical methodology based on a 50% reduction of the initial stiffness and with Pronk’s energy approach.
Fatigue behaviour and stiffness properties of asphalt rubber mixtures made with steel slags
BALDO, Nicola
2012-01-01
Abstract
This paper describes the results of a research studying the fatigue resistance performances of bituminous concretes for base courses and wearing courses (traditional and SMA type), made with steel slags and bitumen modified with crumb rubber or SBS polymers. The fatigue behaviour was also investigated in conditions of long-term ageing, in order to evaluate the effectiveness of the modification with crumb rubber using the wet process in reducing the fatigue damage in heavily oxidized mixtures. The experimental data, obtained from four point bending tests (4PBT), were interpreted both with the classical methodology based on a 50% reduction of the initial stiffness and with Pronk’s energy approach.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
