Abstract:

A novel type of pavement asphalt polymeric modifier was prepared through mixing recycled polyethylene mulch film residue with poly（vinyl acetate） and petroleum resin. The use of the modifier reduced the crystallinity of PE and improved its low temperature flexibility， impact resistance， high melt flow rate， and adhesive performance with sand inorganic materials. This modifier can be directly mixed and stirred with stone in the mixing plant. Compared to the traditional SBS asphalt modifier， the modifier developed by this work can improve the high and low temperature performance of asphalt mixture， avoid the sulfur dioxide pollution in the SBS vulcanization process， improve the high and low temperature rutting resistance performance of highway， and realize the transformation of low-grade plastic waste to treasure. It is of great significance to promote the sustainable development of the environment and the construction of green traffics.

Key words: recycled polyethylene mulch film, pavement asphalt modifier, pavement asphalt modified mixture