Analysis of the Influence of Production Method, Crumb Rubber Content and Stabilizer on the Performance of Asphalt Rubber

Li, Haibin; Li, Wenbo; Temitope, Ahmed Abdulakeem; Zhao, Dong; Zhao, Guizhe; Ma, Qiang

doi:10.3390/app10165447

Cited by 14 publications

(5 citation statements)

References 24 publications

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“…The performance of different grades of base asphalt and the modified asphalt produced by the same modifier is quite different, so the first task is to select a base asphalt with good compatibility with stable rubber powder [18]. Asphalt often used in the design of high-grade pavements in Northwest China has been taken into consideration.…”

Section: Base Asphaltmentioning

confidence: 99%

Research on the Viscosity-Temperature Properties and Thermal Stability of Stabilized Rubber Powder Modified Asphalt

Guo

Ping

et al. 2021

Sustainability

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A stabilized rubber powder-modified asphalt was provided for the field of rubber asphalt, and the optimal blending amount of stable rubber powder was determined from indicators, such as penetration, penetration index, ductility, softening point, and viscosity at 135 °C. The viscoelastic curve was measured, and the thermal storage stability test showed that the stabilized rubber powder-modified asphalt has significant thermal storage stability. The specific surface area, scanning electron microscope, and differential scanning calorimeters were used to analyze the dispersion state and aggregation state of the rubber powder particles in the stabilized rubber powder-modified asphalt, etc. The swelling state and reaction mechanism of the rubber powder in the stabilized rubber powder-modified asphalt have been characterized. The results show that the temperature sensitivity of the asphalt was improved after the stabilized rubber powder was added. The content of the stabilized rubber powder was determined to be 30%, which effectively reduces the viscosity at 135 °C, and the workability is improved; the impact of rubber powder-modified asphalt was less than that of ordinary rubber asphalt, but the temperature should be strictly controlled to ensure the viscosity of stable rubber powder-modified asphalt; the specific surface area comparison test shows that the stable rubber powder has better performance than ordinary rubber powder and asphalt matrix. The advantage of having a larger contact area enhances the compatibility of stabilized rubber powder with asphalt; scanning electron microscopy and differential scanning calorimeters test results show that the stable rubber powder-modified asphalt is mainly based on the compatibility mechanism, and a series of processes, such as oil absorption swelling-high temperature shear-compatible dispersion, occur.

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Section: Base Asphaltmentioning

confidence: 99%

Research on the Viscosity-Temperature Properties and Thermal Stability of Stabilized Rubber Powder Modified Asphalt

Guo

Ping

et al. 2021

Sustainability

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“…Hundreds of used tires are produced every year, which are difficult to recycle and degrade, and discarding them through incineration or landfills causes great harm to the environment [1,2]. In order to reduce "black pollution", cutting tires into rubber particles (RPs) or rubber crumb (CR) as an asphalt modifier has become one of the effective ways to solve the problem of waste tire recycling [3,4]. The preparation of waste-rubber-modified asphalt can effectively alleviate the environmental pressure and reduce landfill waste and incineration brought about by environmental pollution and costs; the secondary use of waste rubber can achieve resource sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…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

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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.

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“…In order to ensure that CR powder and asphalt can be mixed homogeneously, the amount of CR powder must be strictly controlled during the preparation of modified asphalt. Li et al [9] proposed that the physical performances were optimal when the CR contents were 20-25 wt% for SK 90# matrix asphalt and 22-26 wt% for SK 70# matrix asphalt. erefore, there is a great need for additional modifiers to prepare composite modified asphalt to compensate for these limiting factors to enhance the high-and low-temperature performance, temperature sensitivity, and rheology of rubber asphalt [10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

Gong

Pang

Fayang

et al. 2021

Advances in Materials Science and Engineering

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The performance of asphalt can be improved by adding styrene-butadiene-styrene (SBS) copolymer and crumb rubber (CR). This paper investigated the influence of the structure and content of styrene-butadiene-styrene (SBS) copolymer on the properties of SBS/CR modified asphalt (SBS/CRMA). These SBS/CRMA were prepared by mixing 90# matrix asphalt, 60 mesh CR powder, and SBS copolymers with two molecular structures, which were tested for penetration, softening point, ductility, and rheology. The complex modulus, phase angle, rutting factor, storage modulus, and dissipation modulus of SBS/CRMA were analyzed with the 64°C frequency sweep tests. The results revealed that the content and structure had significant impacts on the performances of SBS/CRMA, and the advantages of SBS polymer network structure in the modified asphalt system cannot be reflected when the amount of SBS was small. Meanwhile, the high-temperature stability, low-temperature tensile resistance, temperature sensitivity, and viscoelasticity of rubberized asphalt were further improved by adding a moderate amount of SBS copolymer. Furthermore, the properties of SBS/CRMA were better as the contents of SBS increased when the type of SBS doped was the same. The effect of modification improved by star-shaped SBS copolymer addition was more than that improved by linear SBS copolymer addition. As a conclusion, the content of 4 wt% star-shaped SBS and 20 wt% CR powder-modified 90# matrix asphalt has the best modification effect with the comparison of other groups.

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Analysis of the Influence of Production Method, Crumb Rubber Content and Stabilizer on the Performance of Asphalt Rubber

Cited by 14 publications

References 24 publications

Research on the Viscosity-Temperature Properties and Thermal Stability of Stabilized Rubber Powder Modified Asphalt

Research on the Viscosity-Temperature Properties and Thermal Stability of Stabilized Rubber Powder Modified Asphalt

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

Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt

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