Microstructure characterisation and constitutive modelling of waterborne epoxy resin modified bitumen emulsion

From the pavement construction emission perspective, bitumen emulsion is considered more environment-friendly than conventional because of its much lower temperature. However, faces major concern low mechanical strength especially at high service temperatures. To improve performance emulsion, waterborne epoxy resin can be used as a modifier. Nevertheless, there still lacks fundamental understanding on effects microstructure and rheological performances residual emulsion. fill this gap, study aims to investigate develop constitutive model resin-modified residue (WEBER). achieve objective, confocal laser scanning microscopy was first adopted characterise WEBER. The frequency sweep tests were then conducted, ‘2S2P1D’ applied simulate WEBER’s dynamic response different loading frequencies. results indicated that formed polymer-rich film around phase in when content reached 3 wt%, well describe