Study on Storage Stability of Activated Reclaimed Rubber Powder Modified Asphalt

Kong, Peipei; Xu, Gang; Yang, Jingyao; Chen, Xianhua; Zhu, Yueyong

doi:10.3390/ma14164684

Cited by 14 publications

(3 citation statements)

References 33 publications

(47 reference statements)

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“…Under certain mechanical shearing and thermal oxygen conditions, the stabilizer can generate free radicals, which can crosslink and graft with polymer molecular chains such as SBS, reclaimed rubber powder, and bitumen active functional groups to form grafted copolymers. Thereby, the polymer and bitumen can form a stable spatial structure, finally improve the thermal storage stability of modified bitumen, and solve the segregation of modified bitumen [34]. The technical index test results are shown in Table 6.…”

Section: Methodsmentioning

confidence: 99%

Performance and Mechanism of High-Viscosity and High-Elasticity Bitumen (HVE-MB) Modified with Five Additives

Li,

Jiang,

Yan

et al. 2023

Sustainability

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In order to improve the viscoelasticity of bitumen, several modifiers were compounded with it, including SBS, reclaimed rubber powder, tackifier, plasticizer, and oil stabilizer, to produce High-viscosity and High-elastic Modified Bitumen (HVE-MB). The viscoelasticity and various physical and rheological properties of the bitumen were evaluated using a number of factors, such as dynamic viscosity at 60 °C, elastic recovery, penetration, softening point, ductility, and DSR. By comparing different types of modifiers and the content of SBS, it was found that the viscoelasticity of the original bitumen was significantly improved by adding the modifiers. In comparison to the original bitumen, the dynamic viscosity of the HVE-MB increased by more than 110 times, the elastic recovery rate more than doubled, the softening point and ductility improved, and the penetration decreased. As the content of SBS increased, the improvement in the properties became more significant. The workability of HVE-MB satisfies the requirement of less than 2.5 °C by adding the suitable dosage of stabilizer. On the other hand, the content of SBS can be adjusted based on the specific requirements. It is a sustainable and economic way to use the reclaimed rubber powder to improve the technical performance of bitumen.

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Section: Methodsmentioning

confidence: 99%

Performance and Mechanism of High-Viscosity and High-Elasticity Bitumen (HVE-MB) Modified with Five Additives

Li,

Jiang,

Yan

et al. 2023

Sustainability

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“…To increase the compatibility between CR and asphalt, researchers have made many attempts, , and pretreatment of WCR has been proven to be an effective way. , Pretreatment can remove inert substances from the WCR surface to enhance its surface activity and accelerate the interaction between the WCR and asphalt. Currently, the surface activity of WCR can be increased by thermomechanical, microbiological, and plasma activation methods; the commonly utilized techniques are chemical, mixing oil, and microwave radiation approaches. ,− These methods are shown in Figure …”

Section: Molecular Dynamics Simulation Of Waste Polymer-modified Asphaltmentioning

confidence: 99%

Perspectives on the Application of Waste Materials in Asphalt Based on Molecular Dynamics Simulations: A Review

Yao,

Zeng,

Liu

et al. 2024

Energy Fuels

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During the last few decades, industrial waste has increased at an alarming rate, and the recycling of waste materials has always been an urgent problem to be solved. While the number of vehicles per citizen has dramatically increased, as well as the traffic loading, limiting the deterioration of the pavement networks is an approach, and it can be achieved by the addition of polymers to asphalt binders and mixtures. Waste polymers are used in asphalt due to their low cost and environmental friendliness. Both asphalt and polymeric materials are complex in structure, and it is difficult for researchers to quickly and clearly understand the properties of the materials and how they change. Multiscale research approaches effectively improve the understanding of materials with macroscopic/experimental data and microscopic simulations. The Molecular Dynamics (MD) method is employed to analyze material properties from a nanoscale perspective, and it is one of the most powerful and effective tools to understand fluid and material behaviors at an atomic level. This work aims to review the application of waste materials to asphalt materials based on the MD method. A brief description was demonstrated for the model generation and property analysis of modeling asphalt molecules and waste polymer-modified asphalt, especially electronic waste materials, as well as recycled asphalt pavement (RAP) and thermoplastics. Moreover, the advantages and disadvantages of MD simulation methods were extensively discussed for the application of waste materials in engineering materials. The review may provide a more comprehensive understanding of related projects and guide subsequent research for readers.

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“…In addition, Liu et al [45] used reactive waste binder particles to enhance the compatibility of PE with asphalt binders, thereby enhancing the storability of the PE-modified asphalt. Kong et al [46] found that waste lubricant byproducts were beneficial to improving the compatibility of recycled binder powder with asphalt and enhancing the storage stability of binder-powdermodified asphalt. Sienkiewicz et al [47] found that the addition of compounds that enable physical and chemical interactions between the modifier and asphalt in modified asphalt can enhance the stability of modified asphalt.…”

Section: Introductionmentioning

confidence: 99%

Modification Mechanism and Technical Performance of Recycled PE-Modified Asphalt

Chen

et al. 2023

Sustainability

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Waste plastic pollution is a serious issue. In order to adhere to the concept of green development and rationally dispose of polyethylene waste plastic products, polyethylene (PE)-modified asphalt was prepared using recycled polyethylene (RPE) and low-density polyethylene (LDPE) as raw materials. The chemical structures of the RPE- and LDPE-modified asphalt were studied using a Fourier transform infrared spectrometer (FTIR), and the dispersion of RPE was studied using a fluorescence microscope (FM). Subsequently, the modification mechanism of the PE-modified asphalt was revealed. The physical properties and high- and low-temperature rheological characteristics of the PE-modified asphalt were examined using physical property tests, a dynamic shear rheometer (DSR), and a bending beam rheometer (BBR). The creep performance of the PE-modified asphalt was analyzed using multiple-stress creep recovery (MSCR). In addition, a laboratory-made inexpensive inorganic stabilizer was added to enhance the storability of the PE-modified asphalt. The results show that PE and asphalt are similarly compatible and form an S-C bond with an inorganic stabilizer. The resulting product’s storage stability is enhanced via the cross linking between the PE and asphalt and the subsequent formation of a network structure. The segregation softening point increased from 2 °C to 45 °C with the increase in PE content, and the increase in RPE was more obvious than that of LDPE. The high-temperature failure of the 2–6% RPE-modified asphalt can reach 70 °C, while that of the 8% RPE-modified asphalt can reach 76 °C. Low-temperature performance was reduced slightly: the 8% PE-doping low-temperature failure temperature was −14.7 °C. The low-temperature performance was somewhat reduced, but it was still within a PG rating.

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Study on Storage Stability of Activated Reclaimed Rubber Powder Modified Asphalt

Cited by 14 publications

References 33 publications

Performance and Mechanism of High-Viscosity and High-Elasticity Bitumen (HVE-MB) Modified with Five Additives

Performance and Mechanism of High-Viscosity and High-Elasticity Bitumen (HVE-MB) Modified with Five Additives

Perspectives on the Application of Waste Materials in Asphalt Based on Molecular Dynamics Simulations: A Review

Modification Mechanism and Technical Performance of Recycled PE-Modified Asphalt

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