Performance optimization of composite modified asphalt sealant based on rheological behavior.

Highlights: [•] We determined best contents of raw materials of composite modified asphalt sealant. [•] Central composite design is effective in optimizing performance of composite modified asphalt sealant. [•] It is effective to use energy method to evaluate viscoelastic properties of asphalt. [•] We analyzed the effects of rubber powder, additive, SBS and SBR on rheological behavior of modified asphalt. [Copyright &y& Elsevier]