Laboratory performance evaluation of waste tire rubber (WTR) and ethylene-vinyl acetate (EVA)-modified asphalt mixtures

Hong, Zhe; Yan, Kezhen; Wang, Min; Ge, Dongdong; Chen, Jinghao

doi:10.1080/10298436.2023.2224914

Cited by 1 publication

(1 citation statement)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A study also showed that waste tire rubber powder (WTR) exists in a granular state in asphalt, which is not conducive to the compatibility of the two, resulting in stress concentration. At present, using WTR composite with other asphalt modifiers is the mainstream way to prepare a modified asphalt with better performance, including common modified materials such as SBS, PE, EVA, and so on [6][7][8][9]. Although composite-modified asphalt prepared using WTR and SBS has excellent performance at high and low temperatures, there are some problems, the most important of which is the presence of rubber molecular chains and the difference in physicochemical properties with asphalt, resulting in high viscosity in the modified asphalt, processing difficulties, high temperature degradation, poor storage stability, hydrogen sulfide gas release processing [3,4], and mixture mixing difficulties [2,5].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Performance of Asphalt Modified by Desulfurized Waste Rubber/Ethylene Vinyl Acetate Composite with Additives

Song,

Zhou,

Luo

et al. 2024

Sustainability

View full text Add to dashboard Cite

The recycling of waste tires avoids the environmental hazards of landfills and incineration, and its application in asphalt modification achieves resource sustainability. Currently, desulfurized rubber powder (DRP) is widely used as an asphalt modifier, mainly mixed with SBS, and fewer studies have been conducted on high-dose asphalt modification with ethylene vinyl acetate (EVA). In this paper, DR/EVA-composite-modified asphalt (DR/EVACMA) was prepared using 20% DRP and 4% EVA by adding four additives: furfural extract oil (FEO), a crosslinking agent (DCP), a vulcanizing agent (sulfur), and a silane coupling agent (KH-550). The aim was to study the effects of different additives on the physical properties, storage stability, and rheological properties of asphalt. First, conventional physical property measurements were carried out, and the data were analyzed using a polar analysis to determine the degree of influence of the four additives and the optimal ratios. Then, the rheological properties and fatigue resistance of DR/EVACMA were investigated through temperature scanning experiments, linear amplitude scanning (LAS) experiments, and multi-stress creep (MSCR) experiments. Finally, the reaction mechanism and microscopic properties were analyzed through infrared spectroscopy experiments (FTIR) and fluorescence microscopy (FM). The results showed that FEO had the greatest effect on asphalt characteristics. Compared to matrix asphalt and additive-free asphalt, DR/EVACMA has higher physical properties, fatigue resistance, and high temperature rheological properties due to its internal crosslinking structure. Its storage stability is also very good, with a difference of only 0.7 °C in the softening point.

show abstract