Research On The Performance Of Worm Asphalt And Its Mixture Based On Surfactant Technology

A growing number of asphalt mixtures is being paved highway and urban road in ourcountry because of a lot of its advantage, but the high temperature of construction of asphaltpavement will aggravate pollution emissions and energy consumption, will add asphalt agingand bring inconvenience to construction of asphalt pavement in the cold and plateau area.Warm mix technology can appropriate lower the construction temperature in the asphaltpavement, and alleviate the defects because of the high construction temperature. In the paper,we developed a kind of warm mix asphalt additives in the laboratory from SurfactantTechnology by comparing with other types of warm mix asphalt additives. And then, weresearched the mixing and compaction temperature, and the performance of the warm asphaltmixtures.Firstly，Through the analysis of viscosity, we determined the best raw materials suitable forthe SK90#matrix asphalt, SBS modified asphalt and rubber asphalt for developing the warmmix asphalt additives. On the basis of orthogonal experiment, we determined to addproportion of the best materials of the warm mix asphalt additives. Finally, the optimumcontent of the warm mix asphalt additives was determined through the analysis of thepenetration, softening point, ductility and viscosity, comparing with Sasobit warm mix asphaltindicators.Secondly, the temperature of mixing and compaction for the warm mix SK90#matrixasphalt mixture was determined, through the viscosity-temperature relationship, andcomparing with mixing and compaction temperature of Sasobit warm mix matrix asphalt. Theresults show: the additives we developd and Sasobit can reduce the temperature of mixing andcompaction about10℃;The temperature of mixing and compaction for warm SBS modifiedasphalt mixture and warm Rubber asphalt mixture was determined through the compaction ofSGC, and comparing with compaction temperature of warm asphalt mixture for Sasobit,Aspha-min and Evotherm. The results show: comparing with other warm mix asphaltadditives, the additives we developd also reduced the temperature of mixing and compactionabout20℃. Finally, the performance of warm mix asphalt mixture was tested, and the results show: thewarm mix asphalt additives we developd can improve the low temperature and water stabilityof mixture performance, and also it was proved huge social and economic benefits through theanalysis of energy conservation and emissions reduction.