Storable waste and old rubber powder modified asphalt for alpine regions and preparation method thereof

Abstract

The invention relates to storable waste and old rubber powder modified asphalt for alpine regions and a preparation method thereof. The storable waste and old rubber powder modified asphalt is prepared from the following components in parts by weight: 100 parts of matrix asphalt, 20 to 24 parts of rubber powder and 4 to 5 parts of poly octene rubber vita-inosculation. The preparation method comprises the following steps of (1) heating the matrix asphalt to 140 to 150 DEG C, and adding the rubber powder and the poly octene rubber vita-inosculation; (2) continuing to heat, timing when the temperature is increased to (205+ / -5) DEG C, and enabling a stirrer to continue to stir for (30+ / -5)min; (3) at the temperature of (205+ / -5) DEG C, enabling a shear to shear for (60+ / -5)min; (4) keeping the same temperature, continuing to stir for (60+ / -5)min; (5) at the temperature of 140 DEG C, developing for (30+ / -5)min, so as to obtain the rubber powder modified asphalt. The storable waste and old rubber powder modified asphalt and the preparation method have the advantages that the operation of the preparation method is simple; the stability and comprehensive property of the obtained modified asphalt are good, the cost is low, and the storage is convenient.

Description

technical field [0001] The invention relates to the field of materials, in particular to waste rubber powder modified asphalt which can be stored in alpine regions and a preparation method thereof. Background technique [0002] The seasonal temperature difference in alpine regions is large and the temperature is low. With the increasing traffic volume and vehicle load, the early disease problem of asphalt pavement is also increasing. Rubber asphalt based on waste tires has good temperature resistance. Performance, fatigue resistance, lower road noise and mechanical and temperature characteristics of road construction costs, it is expected to better deal with certain diseases, and asphalt resources are limited, making engineering construction difficult and cost increased, looking for an alternative has become a Problems to be solved. [0003] The natural rubber, synthetic rubber, sulfur, carbon black, anti-aging agent and other components contained in waste tire rubber powde...

AI Technical Summary

Problems solved by technology

[0004] However, due to the influence of rubber powder processing equipment and construction technology, the application of waste tire rubber powder rubber asphalt in the road industry has progressed slowly, especially the characteristics of rubber asphalt, such as easy segregation and poor high-temperature storage stability, still have great impact on construction. Restrictions restrict the development of rubber asphalt road technology

The main problem of rubber asphalt in practical application is that the molecular weight of tire rubber powder is very large, it is not easy to swell in asphalt, and there is a lack of chemical interaction between asphalt and rubber powder.

[0005] Moreover, the specific gravity of rubber powder is larger than that of asphalt, which has poor compatibility with asphalt and poor thermal storage stability. After the rubber powder absorbs the light components of asphalt, the viscosity of the asphalt increases greatly, which increases the difficulty of construction and makes it difficult to guarantee the quality of the project.

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