Research on the Performance and Mechanism of Desulfurization Crumb Rubber/SBS Modified Asphalt

Abstract

Abstract: In response to the phenomenon of high prices of commonly used styrene-butadiene-styrene (SBS) modified asphalt at present, in order to reduce the engineering cost of SBS modified asphalt. Based on the improvement of asphalt performance and with the effective recycling of waste crumb rubber, this paper investigated the basic performance, storage stability performance, anti-aging performance and other macroscopic properties of the desulfurization crumb rubber (DCR)/SBS modified asphalt, and at the same time, used the scanning electron microscope (SEM) and the Fourier Transform Infrared Spectroscopy (FTIR) were used to analyze and evaluate the morphological characteristics and chemical properties. The results showed that the addition of SBS and desulfurized crumb rubber improved the high and low temperature performance, storage stability, and anti-aging performance of DCR/SBS modified asphalt, and the desulfurized crumb rubber and SBS modifier were uniformly dispersed and crosslinked with each other, and the interface between the three phases of desulfurized crumb rubber-SBS-asphalt was fuzzy, and at the same time, the desulfurized crumb rubber and SBS were coexisting in asphalt for the physical modification and chemical reaction. For the follow-up waste crumb rubber to replace part of the SBS modifier in the road project to provide technical reference for further popularization and application.

References

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