Surface activation of scrap tire crumb rubber to improve compatibility of rubberized asphalt

Li, Jin; Chen, Zixuan; Xiao, Feipeng; Amirkhanian, Serji

doi:10.1016/j.resconrec.2021.105518

Cited by 79 publications

(16 citation statements)

References 94 publications

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“…The incompatibility issue of rejuvenated asphalt using WTR was essentially caused by the great differences in chemical nature (molecular size and polarity) and physical features (density and solubility) between WTR and the asphalt matrix. However, mixing WTR with waste oils had a sufficient influence on compatibility [122]. Dong and Zhao reported that the segregation indices of asphalt rubber and the waste cooking oil WTR rejuvenator (ODR) were 7.2 • C and 0.5 • C, respectively, because the compatibility of the WCO pyrolysis of WTR with virgin asphalt in WCO was improved sufficiently [62].…”

Section: Effect Of Waste Oils On Compatibility and Morphology Of Reju...mentioning

confidence: 99%

Sustainable Asphalt Rejuvenation by Using Waste Tire Rubber Mixed with Waste Oils

Dong

2022

Sustainability

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Waste materials such as waste tire rubber (WTR), waste cooking oil (WCO), bio-oils, waste engine oil (WEO), and other waste oils have been the subject of various scientific studies in the sustainable and waste research field. The current environmental concerns have been identified to protect natural resources and reuse waste materials. Accordingly, this work reviews the use of recycled waste tire rubber mixed with waste oils (waste cooking oil, waste engine oil) and bio-oils that can be extracted from waste oils to rejuvenate asphalt in reclaimed pavements. This new solution may reduce the massive amounts of WTR and waste oils and produce a more environmentally sustainable material. Reclaimed, aged asphalt has been rejuvenated to achieve various penetration capabilities and properties by blending asphalt with one or more waste materials to evaluate the binder using standard tests. Many solutions with promising results in improving the properties of asphalt mixtures have been selected for further characterization. This review highlights that the addition of WTR and waste materials to rejuvenated asphalt binders improves stability, enhances the viscoelastic properties, provides better fatigue and crack resistance performance, and enhances the compatibility of the rejuvenated rubber oil asphalt. Moreover, the flashing point, softening point, ductility, and penetration of aged asphalt and Poly(styrene-butadiene-styrene)-rubber-rejuvenated and waste-rubber-oil-rejuvenated asphalt were enhanced after applying the rejuvenator compound. On the other hand, adding waste oil to WTR and asphalt reduces the viscosity and enhances the storage stability compared to the asphalt rubber binder.

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Section: Effect Of Waste Oils On Compatibility and Morphology Of Reju...mentioning

confidence: 99%

Sustainable Asphalt Rejuvenation by Using Waste Tire Rubber Mixed with Waste Oils

Dong

2022

Sustainability

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“…The 330NH18 slurry was obtained by mixing 96.3-97.2 parts of polyether polyol 330N and 3.7-2.8 parts of gaseous silica HDK H18 and stirring evenly.The 330N acetylene black paste was obtained by mixing 96.77-97.51 parts of polyether polyol 330N and 3.23-2.49 parts of acetylene black.Polyether polyol 330N: 11.56-12.13 parts, chain extender E-300:18.43-19.06 parts, diethylene glycol: 4.56-4.89 parts, 330NH18 pulp: 48.7-4.95 parts, 330N acetylene black pulp:8.34-8.97 parts, dioctyl phthalate DOP: 5-5.5 parts, catalyst: 0.09-0.12 parts, antioxidant: 0.27-0.33 parts, silane coupling agent: 1.79-1.89 parts, defoamer BMC806:1.26-1.36 parts;Mix and stir evenly to prepare component A [9] .…”

Section: Preparation Of Component Amentioning

confidence: 99%

Preparation and property analysis of polyether polyol two-component rubber repair material

Nie

Liu

2022

J. Phys.: Conf. Ser.

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In order to solve the problem that the damage of rubber material cannot be repaired quickly and conveniently, this paper studies a repairing agent that is easy to use and repairs quickly.The modifier is composed of A and B components. The A component can be obtained by blending polyether polyol 330N, chain extender, diethylene glycol, 330NH18 slurry, 330N acetylene black slurry, dioctyl phthalate DOP, catalyst, antioxidant, silane coupling agent and defoaming agent at room temperature and vacuum.The mixture of polyether polyol GE220, 220H18 and dioctyl phthalate DOP, MDI-3051 and MDI-100LL at room temperature and vacuum was used to obtain component B.When using, mix A and B components by 1:0.7-1.3.The repair agent is simple to prepare and easy to use, and can be used for repairing any type of rubber damage. It is not limited by space and shape of rubber parts. It can be formed in 1 minute, have strength in 8 minutes, reach 80% strength in 2 hours and put into use.

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“…This kind of modifier can enhance the cohesion between aggregate particles so that the asphalt pavement can adapt to high wear requirements, increased skid resistance, and other sections. Guo [ 26 , 27 ], Zheng [ 28 ], and some other researchers [ 29 , 30 ] used waste tires as raw materials to prepare rubber-modified asphalt and conducted research. Some researchers use plastics as modifiers, such as polyethylene, polyurethane, polypropylene, etc.…”

Section: Introductionmentioning

confidence: 99%

Study of the Microscopic Mechanism of Natural Rubber (Cis-1, 4-Polyisoprene, NR)/Polyethylene (PE) Modified Asphalt from the Perspective of Simulation

Chen

et al. 2022

Polymers

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This paper aims to study the interaction mechanism of waste tire/plastic modified asphalt from the microscopic perspective of molecules. Based on BIOVIA Materials Studio, a classic four-component asphalt model consisting of asphaltene (C149H177N3O2S2), resin (C59H85NOS), aromatic (C46H50S), and saturate (C22H46) was constructed. Waste tires are represented by natural rubber (NR), which uses cis-1, 4-polyisoprene as a repeating unit. In contrast, waste plastics are characterized by polyethylene (PE), whose optimum degree of polymerization is determined by the difference in solubility parameters. Then, the above molecular models are changed to a stable equilibrium state through the molecular dynamics process. Finally, the interaction process is analyzed and inferred using the indexes of radial distribution function, diffusion coefficient, and concentration distribution; further, the interaction mechanism is revealed. The results show that the optimal degree of polymerization of PE is 12, so the solubility parameter between PE and NR-modified asphalt is the lowest at 0.14 (J/cm3) 1/2. These models are in agreement with the characteristics of amorphous materials with the structures ordered in the short-range and long-range disordered. For NR-modified asphalt, the saturate moves fastest, and its diffusion coefficient reaches 0.0201, followed by that of the aromatic (0.0039). However, the molecule of NR ranks the slowest in the NR-modified asphalt. After the addition of PE, the diffusion coefficient of resin increased most significantly from 0.0020 to 0.0127. NR, PE, and asphaltene have a particular attraction with the lightweight components, thus changing to a more stable spatial structure. Therefore, using NR and PE-modified asphalt can change the interaction between asphalt molecules to form a more stable system. This method not only reduces the large waste disposal task but also provides a reference for the application of polymer materials in modified asphalt.

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Surface activation of scrap tire crumb rubber to improve compatibility of rubberized asphalt

Cited by 79 publications

References 94 publications

Sustainable Asphalt Rejuvenation by Using Waste Tire Rubber Mixed with Waste Oils

Sustainable Asphalt Rejuvenation by Using Waste Tire Rubber Mixed with Waste Oils

Preparation and property analysis of polyether polyol two-component rubber repair material

Study of the Microscopic Mechanism of Natural Rubber (Cis-1, 4-Polyisoprene, NR)/Polyethylene (PE) Modified Asphalt from the Perspective of Simulation

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