Production technology of high stability asphalt by modification of waste tyre rubber powder

Abstract

The invention relates to a process for producing waste-tire rubber powder modified asphalt, in particular to a process for producing high-stability waste-tire rubber powder modified asphalt. The process is characterized in that the surface of waste-tire rubber powder is first activated; then the activated waste-tire rubber powder is added to hot asphalt, fully stirred, swollen, sheared, ground and then injected into a development tank for inoculation reaction, so as to obtain stable waste-tire rubber powder modified asphalt; the production course of the process belongs to chemical-physical action; the activated waste-tire rubber powder and the asphalt are subjected to crosslinking reaction and form a stably linked molecular structure; and the modified asphalt is stable in performance and capable of long-term storage. The high-stability waste-tire rubber powder modified asphalt has the characteristic of good stability.

Description

technical field [0001] The invention relates to a production process of waste tire rubber powder modified asphalt. Background technique [0002] The application of waste tire rubber powder modified asphalt in highway and urban road pavement has the following characteristics: [0003] ①The penetration is reduced, the softening point is increased, the viscosity is increased, the high temperature stability of asphalt is improved, and the high temperature anti-rutting ability is enhanced; [0004] ②Improve the low-temperature performance of asphalt and improve the low-temperature crack resistance of the mixture; [0005] ③Enhance the adhesion, increase the thickness of the rubber powder modified asphalt film adhered to the stone surface, and improve the water damage resistance of the asphalt pavement; [0006] ④ Improve the anti-aging performance and anti-fatigue performance of the mixture; [0007] ⑤ Reduce noise pollution; [0008] ⑥Reduce and eliminate the pollution cause...

AI Technical Summary

Problems solved by technology

The physical particles of waste tire rubber powder suspended in rubber powder asphalt are unevenly distributed in the process of stirring dispersion and high temperature movement, so the quality of the waste tire rubber powder modified asphalt produced is unstable; The tire rubber powder modified asphalt production equipment process produces waste tire rubber powder modified asphalt with a mixed suspension system structure, which has the characteristics of easy layering and segregation, and poor storage

The waste tire rubber powder modified asphalt produced by the existing equipment should not be stored for too long, generally no more than 24 hours. It is best to modify and make it on site and use it on site, and its performance is large in dispersion and poor in stability during engineering use.

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