Investigation into cold recycled materials: Influence of rejuvenant, mix design procedure and effects of temperature on compaction

The aim of this research was to investigate the behavior of cold recycled materials in bitumen emulsion. Firstly a rheological analysis was conducted to establish the effects of rejuvenant on reclaimed pavement; then a mix design procedure for recycled materials was calibrated. Finally the influence of temperature of compaction was considered. The results obtained showed that: the proposed mix design procedure allows to increase the role of components on the behavior of the mixture; the influence of rejuvenant is related to the temperature and condition of the bitumen; the effects of the increase of temperature are strictly dependent on the percentage of bitumen.

► The effects of rejuvenant on bituminous mastics decrease on temperature.
► A mix design procedure for recycled materials with separated phases is proposed.
► The slotted mold pushes out water during compaction simulating onsite condition.
► The effect of temperature on compaction decreases on emulsion content.