INFLUENCE OF RHEOLOGICAL PROPERTIES OF BITUMEN EMULSIONS ON THE PERFORMANCE OF SURFACE DRESSING SYSTEMS

Three bitumen emulsions, used in road surface dressing construction, one conventional and two polymer modified, have been tested in a CarriMed rheometer to determine their theological properties G* and delta. These properties were determined over a temperature range and curing time conditions that resemble those experienced insitu upon laying. A tensile loading test called the Pull-Off Test was developed to determine the adhesive strength of surface dressing systems and was used to study the influence of temperature and curing time on the strength development of dressing systems containing the three emulsions in question. To establish reliability criteria for the developed test, its parameters were correlated with the G* values of the emulsions evaluated under similar temperature and curing time conditions.