Sprayed-Polyurea-Modified Asphalt: Optimal Preparation Parameters, Rheological Properties and Thermal Properties

For promoting modifying application of sprayed polyurea (SPUA) in asphalt pavement materials, the effects materials on high-temperature and fatigue performance binders were investigated from different aspects. First, optimal preparation parameters sprayed-polyurea-modified (SPMAs) determined by designing an orthogonal test. Then, properties with contents characterized rheological testing methods, including Brookfield rotary viscosity (RV) test, grading (PG) multiple stress creep recover (MSCR) linear amplitude sweep (LAS) test time sweeping (TS) Finally, thermal analyzed differential scanning calorimetry (DSC) The results showed that optimum extreme difference analysis method variance (ANOVA) method, shearing was 40 min, rate 6000 rpm temperature 150 °C. Sprayed positively affected could improve resistance binders. Moreover, had high sensitivity to binder, which help distinguish effect dosing accurately. beneficial stability binders, explains reason why have excellent a microscopic perspective.