Rubber-plastic alloy for warm mix asphalt mixture and method for manufacturing the same

摘要

A rubber-plastic alloy for a warm mix asphalt mixture and a method for manufacturing the same are disclosed. The rubber-plastic alloy consists of plastic, crumb rubber, cracked wax and rubber oil. The manufacturing method includes extruding the plastic, the crumb rubber, the cracked wax, and the rubber oil at suitable ratio via a single screw extruder, and pelleting via a water-cooled die-face cutter. The rubber-plastic alloy is mixed with a hot mineral material in an asphalt mixture mixer, and then liquid asphalt matrix is pumped into the mixer via an asphalt pump to provide a warm mix rubber-plastic modified asphalt mixture. The rubber-plastic alloy is applied for modifying an asphalt mixture to an effect equivalent to that achieved by a wet method.

主权项

1. A rubber-plastic alloy for a warm mix asphalt mixture, wherein the rubber-plastic alloy consisting of polyethylene plastic, crumb rubber, cracked wax and rubber oil, the polyethylene plastic is present in an amount of 5-30 wt % based on the summed amount of the polyethylene plastic and the crumb rubber, the crumb rubber is present in an amount of 70-95 wt % based on the summed amount of the polyethylene plastic and the crumb rubber, the summed amount of the cracked wax and the rubber oil is 10-50 wt % of the summed amount of the polyethylene plastic and the crumb rubber, cracked wax, and rubber oil, in which the summed amount of the cracked wax and the rubber oil is 10-50% of the summed amount of the polyethylene plastic and the crumb rubber, the weight ratio of the cracked wax and the rubber oil is 3:1, and the rubber-plastic alloy can be directly used in an asphalt mixture and warmly mixed to provide a modified asphalt mixture.