Study on the Impacts Mechanism of Warm-mix Agent on Physical Properties and Rheological Behavior of High Viscosity Asphalt
In order to investigate the effects of different warm-mix agent on the performance of high viscosity asphalt(HVA),three commonly used warm-mix agents of the organic viscosity reducer Sasobit,the surfactant Evotherm,and the diluent viscosity reducer of waste cooking oil(WCO)were selected to prepare corresponding warm-mix HVA,and comparatively analyze the physical properties,viscosity and rheological characteristics.The results indicate that Sasobit and WCO significantly reduce the rotational viscosity of HVA,whereas the viscosity-reducing effect of Evotherm is relatively weaker.The addition of Sasobit hardens the asphalt(penetration decreased and complex mod-ulus increased),improves the fatigue resistance and high temperature performance of HVA,but adversely affects low temperature performance;WCO negatively impacts high temperature performance by reducing the maximum shear stress,but notably enhances low temperature crack resistance;Evotherm has lower impact on the high and low temperature properties of HVA.
high viscosity asphalt(HVA)warm-mix agentlow temperature performancehigh temperature per-formanceviscosity
国家科技期刊平台
NSTL
万方数据
