Powder styrene butadiene rubber polymeric modified asphalt and preparation method thereof

Abstract

The present invention relates to an asphalt product which uses powdery styrene-butadiene rubber macromolecular polymer as modifier to modify base asphalt and a preparation method thereof. According to the weight percentage, the asphalt product consists of 3 percent to 15 percent of aryl rubber filling oil, 2 percent to 10 percent of powdery styrene-butadiene rubber modifier and the road asphalt with the rest quantity. The aryl rubber filling oil is the furfural extracted oil with 60 percent to 95 percent of the content of aromatic hydrocarbon and heavy rubber filling oil. The road asphalt is the naphthenic base heavy oil asphalt with the content of asphalt and sulfur less than 0.5 percent and the content of colloid more than 45 percent. The modifier is the styrene-butadiene rubber with the molecular weight of 200 thousand to 300 thousand and is combined with 21.5 percent to 35.0 percent of styrene. The present invention has simple technology, convenient operation, little investment and low energy consumption. At the same time, during the process of the preparation, materials do not erode a device; a preparation technology does not produce three-waste and causes no pollution to theenvironment; the solubility among each raw material is good; the prepared product has stable performance and can not produce segregation phenomenon.

Description

Field The invention relates to a polymer-modified asphalt and a preparation method thereof, in particular to an asphalt product which uses powdered styrene-butadiene rubber polymer as a modifier to modify matrix asphalt and a preparation method thereof. Background technique According to the book "Petroleum Asphalt Production and Application" written by Zhang Deqin and others and published by Sinopec Press, there are currently three main processes for producing styrene-butadiene rubber modified asphalt in China. The first is the solvent method: cut the solid styrene-butadiene rubber into small pieces, add toluene and other benzene organic solvents to dissolve, and then mix with hot asphalt and evaporate the solvent to produce styrene-butadiene rubber modified asphalt. The second is the latex method: adding styrene-butadiene rubber latex to hot asphalt and mixing it directly through mechanical stirring, and then steaming out the water to produce styrene-butadiene rubber modifi...

AI Technical Summary

Problems solved by technology

Another object of the present invention is to provide a kind of preparation method of powdered styrene-butadiene rubber modified asphalt product, and its preparation technology is simpler compared with prior art, has overcome the pollution environment that traditional solvent method causes in the production process, Defects such as poisoning the health of operators and affecting the high and low temperature performance of products, while avoiding the complicated recovery process of solvents, will not cause equipment corrosion and environmental pollution

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