Improvements of Developed Graphite Based Composite Anti-Aging Agent on Thermal Aging Properties of Asphalt

Hu, Zhihui; Xu, Tao; Liu, Pengfei; Oeser, Markus; Wang, Haopeng

doi:10.3390/ma13184005

Cited by 8 publications

(2 citation statements)

References 39 publications

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“…Numerous studies have utilized different modifiers to enhance the aging resistance of SBS asphalt, such as fibers, anti-rutting agents, etc. The application of nanomaterials in road engineering has been widely reported [14]. Sun and his colleagues believed that nanomaterials had the potential to be used as asphalt modifiers and conducted extensive experimental research on nanomaterial-modified asphalt, including the construction of test roads [15,16].…”

Section: Introductionmentioning

confidence: 99%

Aging Behavior and Mechanism Evolution of Nano-Al2O3/Styrene-Butadiene-Styrene-Modified Asphalt under Thermal-Oxidative Aging

Ji,

Wu,

Zhang

et al. 2023

Materials

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The goal of this paper is to analyze the aging behavior and the mechanism evolution of nano-Al2O3 (NA)-reinforced styrene-butadiene-styrene (SBS) asphalt under different thermal-oxidative aging conditions. First, NA/SBS-modified asphalt and SBS-modified asphalt with different aging levels were prepared. Second, the viscosity and high temperature rheological performance of the specimens were tested and the property-related aging indexes were calculated and compared. Third, a Fourier transform infrared (FTIR) test of the specimen was conducted and the chemical group-related aging indexes were calculated and analyzed. Fourth, gel permeation chromatography (GPC) was used to analyze the molecular weight of the specimens under different aging levels. Then, an atomic force microscope (AFM) was adopted to analyze the microsurface morphology of different specimens. Finally, correlation analysis between property-related indexes and chemical group indexes was conducted. The results show that NA can enhance the thermal-oxidative aging resistance of SBS asphalt. NA can inhibit the increase in sulfoxide groups and the degradation of the SBS polymer with the increase in aging. NA can slow down the formation of large molecule during the aging process. The degree of change in both the bee structures and micromorphological roughness of NA/SBS asphalt is lower than that of SBS asphalt under different aging levels.

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Section: Introductionmentioning

confidence: 99%

Aging Behavior and Mechanism Evolution of Nano-Al2O3/Styrene-Butadiene-Styrene-Modified Asphalt under Thermal-Oxidative Aging

Ji,

Wu,

Zhang

et al. 2023

Materials

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“…Nowadays, some researchers have improved the aging resistance by adding nanoparticles or polymer modification to asphalt [ 21 , 22 ]. Hu, ZH et al [ 23 ] investigated the preparation of composite antioxidants from expanded graphite (EG) loaded with CaCO 3 nanoparticles and Mg(OH) 2 (EG/CaCO 3 /MH) in order to reduce the thermo-oxidative aging of the binder. The results showed that EG/CaCO 3 /MH had a synergistic inhibitory effect on the thermo-oxidative aging of asphalt cement.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Asphalt-Mortar-Aging-Resistance-Modifier Dosage Based on Second-Generation Non-Inferior Sorting Genetic Algorithm

Cui

et al. 2022

Materials

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The use of steel slag powder instead of filler to prepare asphalt mortar was beneficial to realize the effective utilization of steel slag and improve the performance of asphalt concrete. Nevertheless, the anti-aging properties of steel-slag powder–asphalt mortar need to be further enhanced. This study used antioxidants and UV absorbers in steel-slag powder–asphalt mortar to simultaneously improve its thermal-oxidation and UV-aging properties. The dosage of modifier was optimized by second-generation non-inferior sorting genetic algorithm. Fourier-Transform Infrared Spectroscopy, a dynamic shear rheometer and the heavy-metal-ion-leaching test were used to evaluate the characteristic functional groups, rheological properties and heavy-metal-toxicity characteristics of the steel-slag-powder-modified asphalt mortar, respectively. The results showed that there was a significant correlation between the amount of modifier and G*, δ, and the softening point. When the first peak appeared for G*, δ, and the softening point, the corresponding dosages of x1 were 2.15%, 1.0%, and 1.1%, respectively, while the corresponding dosage of x2 were 0.25%, 0.76%, and 0.38%, respectively. The optimal value of the modifier dosage x1 was 1.2% and x2 was 0.5% after weighing by the NSGA-II algorithm. The asphalt had a certain physical solid-sealing effect on the release of heavy-metal ions in the steel-slag powder. In addition, the asphalt structure was changed under the synergistic effect of oxygen and ultraviolet rays. Therefore, the risk of leaching heavy-metal ions was increased with the inferior asphalt-coating performance on the steel-slag powder.

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Preparation, Performance, and modification mechanism of high viscosity modified asphalt

Zhou

Chen

2021

Construction and Building Materials

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Improvements of Developed Graphite Based Composite Anti-Aging Agent on Thermal Aging Properties of Asphalt

Cited by 8 publications

References 39 publications

Aging Behavior and Mechanism Evolution of Nano-Al2O3/Styrene-Butadiene-Styrene-Modified Asphalt under Thermal-Oxidative Aging

Aging Behavior and Mechanism Evolution of Nano-Al2O3/Styrene-Butadiene-Styrene-Modified Asphalt under Thermal-Oxidative Aging

Optimization of Asphalt-Mortar-Aging-Resistance-Modifier Dosage Based on Second-Generation Non-Inferior Sorting Genetic Algorithm

Preparation, Performance, and modification mechanism of high viscosity modified asphalt

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