关键词: 橡胶沥青;活化胶粉;粘度;相容性;流变性能

Abstract: In this experiment,rubber powder was modified by three activation methods,which are microwave activation,extraction oil activation and sodium hypochlorite activation,then the activated rubber powder was used to form the rubber asphalt.In order to assess the pros and cons and to make the notability analysis on modification effect of different activated rubber powder on the asphalt,the viscosity,softening point difference and rutting factor of rubber asphalt were measured,besides,the viscosity,compatibility and rheological properties of various activated rubber modified asphalt were also compared.Results show that the rubber powder content has a remarkable influence on the viscosity,heat storage stability and rheological properties of the rubber asphalt.Activated rubber powder can significantly reduce the viscosity and will greatly improve the thermal storage stability of rubber asphalt.The activated rubber powder which produced in different ways has different effects on the performance of rubber asphalt.Generally,the effect of microwave activated rubber powder on viscosity reduction is the lowest.While,the effect of extracted oil activated rubber asphalt on storage stability is the greatest,but it has a weak effect on the rheological properties of rubber asphalt.While,the rheological properties decrease with the content increasing.In addition,there is a remarkable influence of the sodium hypochlorite activated rubber powder on the improvement of the rheological properties.

Key words: rubber asphalt;activated rubber powder;viscosity;compatibility;rheological behavior