Asphalt mixture anti-rutting additive and preparation and use method thereof

Abstract

The invention relates to an asphalt mixture anti-rutting additive and a preparation and use method thereof. The anti-rutting additive which is in common use at present has insufficient toughness and poor deformation recovery capability under the condition of heavy load, or has poor adaptability and small application range because the existing anti-rutting additive needs to take chemical reaction with the asphalt. The invention provides the asphalt mixture anti-rutting additive, which is prepared from the following ingredients in weight parts: 25 to 75 percent of polyethylene, 5 to 35 percent of polypropylene, 5 to 25 percent of PVC, 3 to 5 percent of rubber, 5 to 10 percent of asphalt, 1 to 5 percent of tougheners and 1 to 3 percent of UV ageing resistant agents. The ingredients are mixed and uniformly stirred according to the ingredient mixture ratio, and are put into a screw extruder to be heated into 110 to 180 DEG C, the materials are extruded into granules after being fused and prepared into uniform substances, and the asphalt mixture anti-rutting additive can be directly mixed with the asphalt mixture in a dry mode when in use. The additive of the invention has the advantages of low asphalt cost and stable structure, the wear resistance and pressure resistance performance is improved by 15 to 30 percent, the elasticity recover performance index of the asphalt is improved by 10 to 25 percent, and the time limitation of the road surface antifatigue performance is prolonged by 10 to 25 percent.

Description

Technical field: [0001] The invention relates to the technical field of asphalt mixture modifiers compounded by multiple polymers, in particular to an asphalt mixture anti-rutting additive and a method for preparing and using the same. Background technique: [0002] At present, due to the channelized traffic characteristics of expressways and the long longitudinal slope of expressways in mountainous areas in my country, the degree of rutting damage to expressway pavement is extremely serious. [0003] At present, there are two kinds of anti-rutting additives commonly used. One is mixed with various commonly used asphalt mixtures and then paved on the road surface. Although it can increase the crack resistance of asphalt concrete to a certain extent, it can be used under heavy loads. Under these conditions, the toughness is obviously insufficient, and the deformation recovery ability is poor; the second is to obtain modified asphalt by chemical reaction with asphalt and pave ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-rutting additive for asphalt mixture and its preparation and use method, to overcome the problems of poor recovery ability and small application range of the existing additives under asphalt heavy load conditions due to insufficient toughness, and at the same time Has high fatigue resistance and stability