Rheological and Spectroscopic Properties of Ethylene Vinyl Acetate–Modified Rubberized Asphalt

Chen, Jinghao; Yan, Kezhen; You, Lihua

doi:10.1061/(asce)mt.1943-5533.0003187

Cited by 16 publications

(1 citation statement)

References 45 publications

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“…At the same time, chemical activation has good application prospects because of its high reaction efficiency and low energy consumption. Studies have shown that H 2 O 2 , the silane-coupling agent, and ethylene vinyl acetate can increase the solubility of crumb rubber in asphalt [11][12][13]. Ren [14,15] analyzed the influence of the expansion-degradation degree of crumb rubber in asphalt on the chemical and rheological properties of rubber asphalt, and considered that the degradation of crumb rubber increased the formation of free hydroxide groups.…”

Section: Introductionmentioning

confidence: 99%

The Properties of Sodium-Hypochlorite-Activated Crumb Rubber and the Influence of Aging on the Rheological Properties of Activated Asphalt Rubber

Zhang

et al. 2023

Buildings

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Asphalt rubber shows good road performance. However, the compatibility and aging problems of asphalt rubber limit its application. The improvement of the solubility of crumb rubber in asphalt was investigated in this research, and the mechanism of its aging effect on the rheological properties of activated asphalt rubber was studied. First, the crumb rubber was activated by using a sodium hypochlorite (NaClO) solution, and the pore characteristics and microstructure of the activated crumb rubber were analyzed. Second, the influence of the crumb rubber’s activation characteristics on the rheological properties of the asphalt rubber before and after aging was analyzed. Finally, the aging mechanism of the activated asphalt rubber was revealed at a microscopic level. The results showed that with the increase in the activation degree, the pore characteristics of the crumb rubber decreased first and then increased. The surface stacking structure of the crumb rubber increased, and a dense gel film gradually formed. The asphalt rubber prepared by the activated crumb rubber had better rheological properties and had a more significant effect under higher stress conditions. This may have been due to the activation of the crumb-rubber surface, forming oxygen-containing functional groups, which, in turn, increased the combination of the crumb rubber and the asphalt. In addition, the activation degree and aging effect of crumb rubber can reduce the large-particle-size molecule (LMS) content of activated asphalt rubber. There is a significant correlation between LMS content and rheological properties, and LMS content can be used to predict the rheological properties of asphalt rubber.

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