脱硫胶粉/SBS改性沥青性能及机理研究OA北大核心

Aiming to address the phenomenon of high prices of commonly used styrene-butadiene-styrene(SBS)-modified asphalt at present,this work focuses on a reduction in the engineering cost of SBS-modified asphalt.The basic perfor-mance,storage stability,anti-aging performance of the desulfurization crumb rubber(DCR)/SBS-modified asphalt was studied with the purpose of improving the asphalt performance and enhancing the effective recycling of waste crumb rub-ber.Scanning electron microscopy and the Fourier-transform infrared spectroscopy were conducted to analyze and evalu-ate the morphological characteristics and chemical properties of the modified asphalt.The results indicated that the addi-tion of SBS and desulfurized crumb rubber improved the high-and low-temperature performance,storage stability,and anti-aging performance of the modified.The desulfurized crumb rubber and SBS as modifiers were uniformly dispersed in the asphalt matrix and crosslinked with each other.The interface at the desulfurized crumb rubber-SBS-asphalt three phases was fuzzy.Desulfurized crumb rubber and SBS were coexisting in asphalt through the physical modification and chemical reaction.This study provides a technical reference for further popularization and application by using waste crumb rubber to partly replace the SBS modifier in the road project.