Modified production method of asphalt

Abstract

The invention discloses a modified production method of asphalt. The modified production method provided by the invention comprises the following steps of: by utilizing waste rubber powder as a modified raw material, dissolving aromatic hydrocarbon oil components into non-road asphalt or standard road asphalt at a temperature in a range of 60-80 DEG C; then dissolving the waste rubber powder into the mixture at a temperature in a range of 180-220 DEG C and mixing to form a mixed asphalt raw material; finally, heating the mixed asphalt raw material to more than 300 DEG C and separating out fuel oil and the aromatic hydrocarbon oil through use of a continuous decompression and distillation method to obtain an asphalt regenerating agent and an asphalt finished-product. The modified production method provided by the invention has the advantages of easily-obtained raw materials, simple process, economical cost, no additional auxiliary agents and no influence on the environment; and a multi-stage variable-temperature dynamic dissolution process is adopted in the method so that the waste rubber components can be completely dissolved in the asphalt raw material, have good stability and do not chromatograph again. Particularly, the production method does not need use of complicated and high-energy-consumption special devices, such as a high-speed cutting emulsifying machine, a grinder and the like; and the production scale is easy to enlarge.

Description

technical field [0001] The invention belongs to the fields of oil refining and petrochemical industry, and in particular relates to a process for producing bitumen and bitumen modification by using waste tire rubber powder. Background technique [0002] At present, the research, development and popularization of waste rubber powder modified asphalt have received extensive attention. On the one hand, due to the pressure caused by a large amount of waste rubber pollution on environmental protection, there are about 800 million discarded tires in the world every year, and the huge amount of other discarded rubber materials has seriously polluted the environment; on the other hand, The current high molecular polymer modified road asphalt has high cost; moreover, waste rubber powder modified asphalt pavement has excellent skid resistance, wear resistance, high safety factor, low traffic noise, less economic investment, and absorbs light to slow down Strong glare and other advant...

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Problems solved by technology

[0004] However, an important problem is that the addition of a large amount of waste rubber powder in the traditional method of waste rubber powder modified asphalt makes the dispersion of waste rubber powder in the asphalt rubber powder uneven, and it is essential to improve the stability of the waste rubber powder modified asphalt system. A long-term research difficulty in the field

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