Toughness enhancer for repeated regeneration of aged SBS modified asphalt as well as preparation method and application thereof

Abstract

The invention relates to the technical field of regeneration and cyclic utilization of modified asphalt, in particular to a toughness enhancer for repeated regeneration of aged SBS modified asphalt aswell as a preparation method and application thereof. The invention relates to a toughness enhancer for repeated regeneration of aged SBS modified asphalt. The toughness enhancer comprises the following components in parts by mass: 50-100 parts of polyester fibers, 20-50 parts of rubber particles, 20-50 parts of synthetic resin, 2-10 parts of an anionic surfactant and 2-10 parts of activated carbon. According to the toughness enhancer for multiple times of regeneration of the aged SBS modified asphalt as well as the preparation method and application of the toughness enhancer, the toughness enhancer can greatly improve the toughness of the regenerated SBS modified asphalt, so that the regenerated SBS modified asphalt can satisfy the use requirements after multiple times of aging.

Description

Technical field [0001] The technical field of regeneration and recycling of modified asphalt of the present invention particularly relates to a toughness increasing agent for multiple regeneration of aged SBS modified asphalt and a preparation method and application thereof. Background technique [0002] Modified asphalt, especially SBS modified asphalt, has good high temperature stability, low temperature crack resistance and fatigue resistance, and is widely used in the surface layer of high-grade asphalt pavement in my country. However, under severe traffic and climatic conditions, as the service life increases, SBS modified asphalt pavement will also age. This aging SBS modified asphalt pavement material still has a very high reuse value. The key to reusing aging SBS modified asphalt pavement materials is to regenerate aging SBS modified asphalt. [0003] Under the existing technology, the following three methods are generally adopted for the recycling technology of aging SBS ...

AI Technical Summary

Problems solved by technology

[0007] All of these recycling technologies can reuse the aged SBS modified asphalt. However, the test results show that as the number of aging and regeneration increases, it becomes more and more difficult for the asphalt to fully recover to the technical index level before aging. Sensitivity varies, among which the viscosity, toughness and toughness indicators are the most sensitive to the impact of aging, the above indicators drop rapidly after one aging, and the effect of one regeneration has not performed well.

[0008] For SBS modified asphalt after aging for many times (more than three times), its toughness and viscous toughness can no longer meet the requirements of use, which requires other means to increase toughness