| SBS modified asphalt mixture is the main construction material of high-grade pavement in China. If these waste materials can be recycled when the pavement reach its service life, it will have a huge social and economic and environmental benefits.This article will change the technical nature of SBS modified asphalt macroscopic with microscopic components, molecular functional groups and joint analysis of changes in molecular weight. The aging mechanism is SBS degradation decompose and chemically active molecules of the asphalt.was oxygen condensation reaction, so that the occurrence of SBS modified asphalt component migration, destruction of its original structure and the molecular weight distribution of colloids, resulting in a large performance degradation.Based on the principles of SBS modified asphalt aging mechanism, summarized the choice of regenerated catalyst composition. Thus chose the aromatic oil, liquid petroleum resin regenerant six substances as ingredients. Considering the most highly targeted regeneration agent caused by a small scope, this article will be divided six components into A, B groups, when the two are mixed in different proportions regeneration when can effectively varying degrees of aging on different varieties SBS modified bitumen regeneration.In order to verify the regeneration of waste recycling agent SBS modified asphalt mixture, select the A, B two renewable deployment of a two-dose group practical and economic regeneration agents in different proportions added to the waste SBS modified asphalt mixture.Under the old material blending ratio of50%, recycled asphalt SBS has excellent high temperature stability and water stability to meet the requirements of the technical specifications for construction of highway asphalt pavement. |
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