1. College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China; 2. Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Maoming 525000, China; 3. Maoming Asphalt Storage and Transportation Center, Guangdong Highway Administration, Maoming 525000, China
Abstract: Spent rubber powder modified warm mix asphalt is prepared by high-speed shearing method.The short-term simulated aging test is performed to the modified asphalt added with warm mix agent E26 and DWMA rubber powder, respectively.Research results indicate that the addition of E26 or DWMA has changed the content of four components of asphalt, but has no obvious impact on the internal structure of asphalt.After short-term aging, the penetration and ductility of the asphalt drop while its softening point increase.The mass fraction of aromatics in the asphalt decreases, and the mass fractions of gum and asphaltene increase.Through comparison among the asphalts with E26, DWMA and without any warm mixing agent, it is found that the rubber powder modified asphalt with addition of DWMA warm mixing agent has changed the smallest in three indexes and four components before and after short-term aging, and reduce the smallest in functional groups.It is indicated that the anti-aging ability of the rubber powder modified asphalt with DWMA warm mixing agent is better than that with warm mix agent E26 and without any warm mixing agent.
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