Abstract:A novel warm mix additive Siligate with inorganic silica gel as the main ingredient was developed specifically for cold areas. In order to investigate the influence of this warm mix additive on asphalts, styrene butadiene styrene triblock copolymer(SBS) modified asphalt was selected as the test asphalt. Two kinds of warm mix additives that have been widely used in China, Sasobit and Evotherm M1, were used as the comparison. Rotational plate viscosity test, double edge notched tension test, calculation of critical cracking temperature at low temperature(Tcr), quantitative test of characteristic environmental emissions were respectively used to test the changes of construction temperature, fatigue resistance, low temperature crack resistance and characteristic emissions during mix of SBS modified asphalt. The results show that 6% Siligate, 3% Sasobit and 08% Evotherm M1have similar effect in construction temperature decreasing, which can effectively reduce the mixing temperature of asphalt by 13℃ and the compaction temperature by 14℃. Based on above dosage, Siligate can significantly reduce the critical cracking temperature at low temperature(Tcr) and optimize the low temperature performance of asphalt, which are not available in traditional products. In addition, Siligate can also improve the fatigue resistance of asphalt and significantly reduce the emissions of carbon based compounds.