Development and performance of pouring self-luminescent asphalt mixture

Abstract

The application of long afterglow-based materials to the self-luminescent pavement could significantly reduce the power consumption of lighting at night and improve the traffic safety. This study designs a pouring self-luminescent asphalt mixture (PSAM) through pouring a grouting material including the long afterglow luminescent material (SrAl2O4:Eu, Dy) and epoxy resin into the porous pavement void configuration. First, the mechanical and afterglow properties of the epoxy resin-based long afterglow grouting material were systematically tested to determine the optimal composition ratio of raw materials. Then, the influence of time and viscosity on the grouting was studied by obtaining the luminous images of the cross and longitudinal sections of self-luminous asphalt mixture specimens. According to the volume characteristics of the grouting material and the mixture, the relationship between the theoretical grouting consumption and the actual grouting consumption was analyzed. Finally, the influence of porous mixture air void on afterglow characteristics and road performance of the PSAM was analyzed. From the acquired results, it was demonstrated that the optimum proportion of each component of the epoxy resin long afterglow grouting material was the following: epoxy resin: curing agent: toughener: long afterglow material = 100:18:15:14. Moreover, it was found that the temperature and pre-curing time have remarkable effects on the viscosity of grouting materials. In order to ensure a good grouting effect, the viscosity of the grouting material should be controlled within 1.7 Pa s. There was a good linear relationship between the actual grouting amount and the connected air void, although the actual grouting consumption was less than the theoretical grouting consumption. Furthermore, PSAM exhibited good afterglow performance and road performance. The afterglow brightness and water stability had no obvious relationship with the air void. In contrast, with the further increase of the air void, both the low-temperature crack resistance and the skid resistance were improved, and the high-temperature stability was reduced.