Anti-rutting modifier and preparation method thereof

Abstract

The invention discloses an anti-rutting modifier and a preparation method thereof. The modifier comprises: 70% to 94% of sulfur, 2% to 10% of EVA, 3% to 10% of waste rubber powder and hard asphalt in terms of mass percentage 1% to 10%. The preparation method includes the following steps: uniformly mixing sulfur, ethylene-vinyl acetate copolymer, waste rubber powder and hard asphalt, conveying the mixture to an extruder for extrusion and granulation to obtain the modifier of the present invention. The modifying agent of the present invention has little pungent odor during the preparation process, and the modifying agent of the present invention is added into the asphalt mixture, which can effectively improve the anti-rutting performance of the asphalt pavement, and has good compatibility with asphalt.

Description

technical field [0001] The invention relates to a pavement anti-rutting modifier, in particular to an asphalt mixture anti-rutting modifier and a preparation method and application thereof. Background technique [0002] Due to the increasing number of vehicles in our country and the heavy load of transportation, the phenomenon of rutting and wrapping on asphalt pavement is becoming more and more serious, especially in the hot areas in southern my country. This phenomenon has become one of the main damage forms of asphalt roads in our country, seriously affecting the driving safety, service level and service life of asphalt roads. [0003] As early as 1900, people began to use sulfur to modify asphalt to improve the anti-rutting performance of asphalt mixture pavement, but due to the high price of sulfur and the release of H 2 The problem of sulfur-containing gases such as S has restricted the development of sulfur-to-asphalt technology. Until the early 1980s, the sulfur-ba...

AI Technical Summary

Problems solved by technology

The above two patents also need to heat and melt sulfur into a liquid state. The operating temperature is high, which will produce a strong pungent smell, which is not conducive to the environment and human health.

It can only improve the high-temperature performance of the asphalt mixture. The low-temperature cracking resistance and water damage resistance of the mixture still need to be improved, and the sulfur particles formed are also relatively brittle and easily broken during transportation and loading and unloading. Due to the friction between the particles, It will also produce more dust, which not only pollutes the environment, but also easily inhales the staff, endangering health.