Evaluation of the interface adhesion mechanism between SBS asphalt and aggregates under UV aging through molecular dynamics

Yu, Huanan; Ge, Jinguo; Qian, Guoping; Shi, Changyun; Zhang, Chao; Dai, Wan; Xie, Tangxin; Nian, Tengfei

doi:10.1016/j.conbuildmat.2023.133995

Cited by 15 publications

(5 citation statements)

References 55 publications

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“…The presence of these functional groups facilitates the crosslinking polymerization of active components in asphalt, thereby enhancing the molecular arrangement and network structure in modi ed asphalt [39] Therefore, the polar component of D is decreased. Throughout the entire process of UV aged, the dispersion component consistently remains smaller than the polarity component, indicating that the latter is predominantly responsible for determining asphalt [40]. Additionally, certain saturated and aromatic light components in asphalt are transformed into asphaltenes which consequently decreases their relative content while increases that of asphaltenes and resins.…”

Section: Sfe Of Asphalt Before and After Agingmentioning

confidence: 98%

“…On the contrary, asphalt D exhibits a higher δ value. This could be attributed to the ability of rubber powder and SBS composites to effectively absorb a signi cant amount of light components and demonstrate excellent swelling properties in asphalt, thereby impeding the evaporation process of these light components during aged process [40].The δ changes of asphalt C after UV aging show distinct differences compared to the other three types of asphalt, which could be attributed to the degradation of SBS modi er as well as the combined effects of temperature and oxygen. During this process, the unsaturated groups of SBS modi ers undergo dehydrogenation, condensation, and addition reactions in this process, causes an increased number of polar macromolecular components in the asphalt.…”

Section: Frequency Sweepmentioning

confidence: 99%

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Research on the effect of rubber powder on asphalt adhesion and resistance to ultraviolet aging

Hu,

Yu,

Chen

et al. 2024

Preprint

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The utilization of rubber powder as a waste material can enhance the performance of asphalt, thereby prolonging the pavement's service life. In this article, the properties of matrix asphalt, styrene-butadiene-styrene block copolymer (SBS) modified asphalt, rubber modified asphalt and SBS/ rubber composite modified asphalt under ultraviolet aging were studied. Various characterization methods were employed to evaluate surface free energy and rheological properties. The UV aging mechanism were explored through changes in functional groups. The experimental results reveal that asphalt with the addition of rubber powder shows better resistance to ultraviolet aging. UV radiation significantly influenced the adhesion properties of aged asphalt by increasing its polar component of surface free energy while decreasing its dispersion component. Notably, 2 to 4 days of UV aging improve adhesion properties with a remarkable 164.6% increase in surface free energy for rubber powder-modified asphalt. The complex modulus of modified asphalt is also enhanced by the short-term UV aging. However, long-term exposure to UV radiation results in reduced non-recoverable creep compliance compared to control samples. Furthermore, carbonyl groups in both rubber powder-modified and SBS-modified asphalt exhibit minimal changes due to UV aging effects. For matrix asphalt and SBS modified asphalt, the rubber powder shows the ability to improve adhesion and delay ultraviolet aging. The findings provide valuable theoretical insights into utilizing rubber powder for enhancing the ultraviolet aging resistance of asphalt.

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Section: Sfe Of Asphalt Before and After Agingmentioning

confidence: 98%

Section: Frequency Sweepmentioning

confidence: 99%

Research on the effect of rubber powder on asphalt adhesion and resistance to ultraviolet aging

Hu,

Yu,

Chen

et al. 2024

Preprint

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“…The contact pressure with the specimen was 0.7 MPa, and the round-trip rolling speed was 42 times/min, which lasted for 1 h or until the maximum deformation exceeded 25 mm. According to the rutting test machine, the rutting deformation d 1 and d 2 of 45 min (t 1 ) and 60 min (t 2 ) were automatically read, and the dynamic stability was calculated according to Equation (1).…”

Section: Wheel Tracking Testmentioning

confidence: 99%

“…The growing global population and accelerated urbanization are placing higher demands on asphalt pavement performance. Enhancing the quality of the service and durability of pavements and promoting the development of green highways have become the foci of current highway engineering research at home and abroad [1][2][3][4][5]. Fiber is a lightweight, high-strength material that can greatly increase the performances and lifespans of asphalt pavements [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Performance of Modified Corn Stalk Fiber AC-13 Asphalt Mixture

Wang,

Qu,

Tang

et al. 2024

Coatings

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As an agricultural waste, a large amount of corn stalk will cause environmental pollution. In order to realize the resource utilization of waste and meet the strict requirements of modern traffic on pavement strength and durability, it was modified and applied to an AC-13 asphalt mixture to study its influence on the road performance of asphalt mixture and its mechanism. The road performances of modified corn stalk fiber, lignin fiber, and ordinary asphalt mixtures were evaluated via the wheel tracking test, low-temperature bending test, water immersion Marshall test, freeze–thaw splitting test, and fatigue test. Based on the results of three-point bending fatigue test, the viscoelastic parameters and indexes of the fiber asphalt mixture were obtained by fitting the loading specimen and deflection data with the Burgers constitutive model, and the creep strain response was analyzed by applying dynamic load, so as to explore the relationship between the viscoelastic characteristics and creep behavior of modified corn stalk fiber and AC-13 mixture. The long-term high-temperature performance test of the asphalt mixture with the best fiber content was carried out by using the long-term pavement intelligent monitoring equipment independently developed by the group of investigators. According to the findings, the ideal fiber contents for modified corn and lignin in asphalt mixture are 0.2% and 0.3%, respectively. Among them, the modified corn stalk fiber with a 0.2% content has the best effect on road performance, viscoelastic performance, and the asphalt mixture’s creep behavior under dynamic load. Compared with the 0.3% lignin fiber asphalt mixture, its dynamic stability, bending stiffness modulus, immersion residual stability, freeze–thaw splitting strength ratio, and loading times at failure increased by 19.9%, 18.28%, 4.19%, 8.6%, and 9.15%, respectively. Compared with ordinary asphalt mixture, it increased by 47.0%, 28.72%, 7.65%, 15%, and 75.81%, respectively. Moreover, when modified corn stalk fiber is added at 0.2%, the viscoelastic delay time of asphalt mixture is the longest, the strain peak value and rut depth are at a minimum, and the viscoelastic properties, creep properties, and long-term high-temperature properties are the best.

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“…SBS-modified asphalt mixtures highlight their superior performance characteristics compared to conventional asphalt mixtures [ 4 , 5 ]. SBS modification enhances the rheological properties of asphalt binders, resulting in increased stiffness and elasticity, which are crucial for maintaining pavement performance under varying environmental conditions and traffic loads [ 6 , 7 ]. Studies have shown that SBS-modified mixtures possess improved fatigue resistance due to the polymer’s ability to enhance flexibility and tensile strength, thereby reducing crack initiation and propagation [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Advancing Sustainability and Performance with Crushed Bottom Ash as Filler in Polymer-Modified Asphalt Concrete Mixtures

Kim,

2024

Polymers

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Amid the growing demand for sustainable pavement solutions and the need to incorporate recycled materials into construction practices, this study explored the viability of using crushed thermal power plant bottom ash as a filler in polymer-modified asphalt concrete mixtures. Conventional lime filler was replaced with bottom ash at varying levels (0%, 25%, 50%, and 75%), and the resulting mixtures were evaluated using several performance tests. The optimal replacement level was determined to be 25%, based on the results of the indirect tensile strength (ITS) test. Comparisons between the control mixture and the 25% bottom ash-modified mixture were conducted using the dynamic modulus test, Cantabro test, Hamburg wheel tracking (HWT) test, and tensile strength ratio (TSR) test. The findings indicate that the 25% bottom ash-modified mixture demonstrated improved performance across multiple parameters. The HWT test showed enhanced rut durability, with a recorded depth of 7.56 mm compared to 8.9 mm for the control mixture. The Cantabro test results revealed lower weight loss percentages for the modified mixture, indicating better abrasion resistance. The dynamic modulus test indicated higher resilience and stiffness in both high- and low-frequency stages. The TSR test highlighted improved moisture resistance, with higher TSR values after 10 wet-drying cycles. These improvements are attributed to the fine particle size and beneficial chemical composition of bottom ash, which enhance the asphalt mixture’s density, binder-aggregate adhesion, and overall durability. The results suggest that incorporating 25% crushed bottom ash as a filler in polymer-modified asphalt concrete mixtures is a viable and sustainable approach to improving pavement performance and longevity.

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Evaluation of the interface adhesion mechanism between SBS asphalt and aggregates under UV aging through molecular dynamics

Cited by 15 publications

References 55 publications

Research on the effect of rubber powder on asphalt adhesion and resistance to ultraviolet aging

Research on the effect of rubber powder on asphalt adhesion and resistance to ultraviolet aging

Investigation on the Performance of Modified Corn Stalk Fiber AC-13 Asphalt Mixture

Advancing Sustainability and Performance with Crushed Bottom Ash as Filler in Polymer-Modified Asphalt Concrete Mixtures

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