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A platform for research: civil engineering, architecture and urbanism
Ultraviolet irradiation of crumb rubber on mechanical performance and mechanism of rubberised asphalt
Nowadays, researchers have studied influences of ultraviolet on crumb rubber (CR)-modified asphalt (AR) and attempted to comprehensively understand mechanisms of ultraviolet on asphalt or AR entirety. In this article, ultraviolet influences on CR are discussed: mechanical performances of matrix asphalt, AR and strong ultraviolet-irradiated CR-modified asphalt are evaluated by dynamic mechanical analysis, bending beam rheometer and dynamic shearing rheometer (DSR); mechanisms of ultraviolet on CR, irradiated CR on asphalt and morphologies of CR are analysed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Results implied: (i) CR barely reacts with asphalt but irradiated CR reacts vigorously with asphalt by its new chemical bonds and growing internal crosslinkings; (ii) CR has a rough surface with porous shape and size but ultraviolet makes it become dense caused by oxidation; (iii) irradiated CR weakens low-temperature performances but enhances high-temperature anti-shearing performances of asphalt.
Ultraviolet irradiation of crumb rubber on mechanical performance and mechanism of rubberised asphalt
Nowadays, researchers have studied influences of ultraviolet on crumb rubber (CR)-modified asphalt (AR) and attempted to comprehensively understand mechanisms of ultraviolet on asphalt or AR entirety. In this article, ultraviolet influences on CR are discussed: mechanical performances of matrix asphalt, AR and strong ultraviolet-irradiated CR-modified asphalt are evaluated by dynamic mechanical analysis, bending beam rheometer and dynamic shearing rheometer (DSR); mechanisms of ultraviolet on CR, irradiated CR on asphalt and morphologies of CR are analysed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Results implied: (i) CR barely reacts with asphalt but irradiated CR reacts vigorously with asphalt by its new chemical bonds and growing internal crosslinkings; (ii) CR has a rough surface with porous shape and size but ultraviolet makes it become dense caused by oxidation; (iii) irradiated CR weakens low-temperature performances but enhances high-temperature anti-shearing performances of asphalt.
Ultraviolet irradiation of crumb rubber on mechanical performance and mechanism of rubberised asphalt
Road Materials and Pavement Design ; 20 ; 1624-1637
2019-10-03
14 pages
Article (Journal)
Electronic Resource
English
Rubberised asphalt road surfacing
Engineering Index Backfile | 1950
MECHANICAL PROPERTIES OF CRUMB RUBBER MODIFIED ASPHALT MIXTURES
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Microstructure and performance of crumb rubber modified asphalt
| Elsevier | 2009