Investigation of the properties of asphalt and its mixtures containing flame retardant modifier

The flame retardancy of asphalt binder was improved by adding flame retardants in previous research. The research was conducted to assess the performance of two kinds of flame resistant asphalt mixture compared with the control mixture in laboratory. Differential scanning calorimetry (DSC) and thermogravimetry (TG) were employed to investigate the effect of aluminium hydroxide (ATH) on the thermal properties of asphalt binder. The mixture was designed using Superpave (Superior Performing Pavement) methods and related pavement performance was evaluated. The wheel-tracking was employed to research the dynamic plastic deformation performance. Experimental results illustrated that two kinds of flame resistant asphalt binders have better flame retardancy and all the pavement performances of two kinds of modified asphalt mixture can meet the Superpave design requirements. Therefore, it was feasible to prepare asphalt mixture with the excellent flame retardancy and pavement performance using ATH modified asphalt binders.