Environment-friendly warmly-mixed compounded modified asphalt for asphalt pavement, modifying agent and production method of environment-friendly warmly-mixed compounded modified asphalt

Abstract

The invention relates to an environment-friendly warmly-mixed compounded modifying agent for an asphalt pavement and a preparation method thereof. The modifying agent is prepared from the following raw materials in percentage by mass: 95 to 98 percent of matrix asphalt, 1 to 3 percent of Deurex and 1 to 3 percent of Sasobit. The addition amount, in a mixture, of the compounded warmly-mixed modifying agent provided by the invention is 2 to 5 percent of the total mass of asphalt; the technical characteristics and the functions of various additives are different, can be used for realizing a comprehensive modification effect on an asphalt mixture, and can be used for decreasing the viscosity of the asphalt; the mixing and construction temperatures of the asphalt are decreased; not only is theconsumption of an energy source reduced, but also the short-time aging of the asphalt is relieved; the construction time is increased; the haul distance of the asphalt mixture is increased; the high-temperature performance of the asphalt can be also improved and the environment-friendly warmly-mixed compounded modifying agent is particularly applicable to the building of an urban asphalt pavement.

Description

technical field [0001] The invention belongs to new materials for asphalt pavement, and in particular relates to an environment-friendly compound modifier for asphalt pavement. The environment-friendly warm-mix compound modifier is applied to asphalt pavement, especially the construction of urban asphalt pavement. Background technique [0002] In recent years, the greenhouse gases and environmental pollution generated during the construction of hot mix asphalt mixture (HMA) pavement have attracted widespread attention. Therefore, the warm mix concept has become an important topic in asphalt pavement construction. According to statistics, there are currently more than 50 types of warm mix agents in the world, mainly divided into three categories: chemical, inorganic additives, and foaming process. Warm mix asphalt pavement has not only achieved good environmental protection effects, but also can improve its High temperature performance, while reducing the mixing construction ...

AI Technical Summary

Problems solved by technology

However, when a single warm mix agent is applied to asphalt pavement, there is also a decrease in low-temperature performance and insufficient water stability.

In addition, some warm mix agents produce large greenhouse gas emissions during the production process and consume a large amount of raw materials

Therefore, it is difficult to meet the technical and economic requirements of asphalt pavement by using a warm mix agent alone, and there are few technical solutions with better comprehensive effects

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