Statistical modeling of low-temperature properties and FTIR spectra of crumb rubber modified asphalts considering SARA fractions

Wang, Tao; Weng, Yuxin; Cai, Xiaopei; Li, Jin; Xiao, Feipeng; Sun, Guoqiang; Zhang, Fan

doi:10.1016/j.jclepro.2022.134016

Cited by 32 publications

(14 citation statements)

References 33 publications

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“…To comprehend the influence of these molecular-level properties on VOC emission, researchers have analyzed the composition and structure of asphalt using analytical techniques . Fourier transform infrared spectroscopy has revealed that the lighter fractions are mainly aliphatic compounds and monoaromatics, while heavier compounds contain more cyclic rings and polar functional groups that promote aggregation. , Nuclear magnetic resonance spectroscopy provides insights into carbon types, indicating that heavier molecules have a greater proportion of aliphatic carbons . These structural characteristics determine molecular mobility and interactions within the asphalt matrix …”

Section: Release Mechanism Of Asphalt Vocsmentioning

confidence: 99%

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Li,

Qin,

Zhang

et al. 2024

Energy Fuels

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The emission of volatile organic compounds (VOCs) from asphalt during construction processes presents substantial risks to human health and the environment. To advance sustainable transportation development, this review offers a comprehensive study of the methods for characterization, release characteristics, influencing factors, release mechanisms, and environmental impacts of asphalt VOCs. At present, research has been conducted on characterization methods, component characteristics, influencing factors, and environmental and health risks. The findings indicate that gas chromatography–mass spectrometry is the most comprehensive method for characterizing asphalt VOCs. Asphalt VOCs mainly comprise alkanes, aromatics, and aliphatic hydrocarbons. Factors including the temperature, asphalt source, and ultraviolet radiation can all affect the release characteristics of asphalt VOCs. Elevated VOC levels contribute to the photochemical production of ozone and fine particulate matter, exacerbating air pollution and climate change. Additionally, specific asphalt VOCs, including benzene and polycyclic aromatic hydrocarbons, pose health risks to humans. While progress has been achieved in the current research, challenges persist in quantifying VOCs, assessing their environmental impacts and health risks, and implementing effective mitigation technologies. To address these challenges, future research should focus on establishing asphalt VOC fingerprints, quantitative methods, evaluation criteria, material innovation, optimization of construction processes, exposure assessment, and collaborative solution implementation.

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Section: Release Mechanism Of Asphalt Vocsmentioning

confidence: 99%

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Li,

Qin,

Zhang

et al. 2024

Energy Fuels

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“…With the rapid development of China's highway industry, the supply gap for high-quality natural aggregates is expected to widen. Utilizing steel slag as an aggregate in asphalt pavements is an excellent solution to counteract the scarcity of natural aggregates [7,8].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Mechanical and Durability Characteristics of Steel Slag-Infused Asphalt Concrete in Roadway Construction

Zhao,

Zhang

2024

Buildings

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Steel slag is a solid byproduct of the steelmaking process, widely generated in the metallurgical industry. Due to its alkaline nature and excellent adhesive properties with asphalt, it represents a potential road construction material with outstanding road performance, making it well-suited for utilization in highway construction. This paper conducts a systematic analysis of the physical and chemical properties of steel slag, specifically South Steel Electric Furnace slag, and compares it with natural basalt and limestone aggregates. The aim is to establish a foundation for the application of steel slag in asphalt mixtures. Building upon this foundation, we carry out proportioning design for AC-13C and SMA-13 steel slag asphalt mixtures, followed by a comprehensive study of their high-temperature stability, low-temperature stability, water stability, and fatigue performance. Our research reveals variations in the chemical composition of different steel slags, with CaO, SiO2, and Fe2O3 being the primary components. The content of harmful elements varies depending on the steelmaking raw materials and additives used. Notably, the optimum asphalt-to-aggregate ratios for AC-13C and SMA-13 significantly surpass the specified requirements. The freeze–thaw splitting strength ratio and residual stability of steel slag AC-13C and SMA-13 asphalt mixtures exceed the specified requirements, with AC-13C demonstrating the highest water stability, boasting a freeze–thaw splitting strength ratio of 94.07%, and a residual stability of 93.8%. In terms of fatigue characteristics, SMA-13 exhibits a longer fatigue life than AC-13C, indicating superior fatigue performance for steel slag SMA-13. Steel slag enhances the abrasion resistance and rutting resistance of asphalt pavement surface layers, fully meeting the performance requirements for high-grade road surface layers.

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“…Additionally, gel chromatography can be used to determine the number and distribution of macromolecules in rubber asphalt. This allows researchers to study and analyze the swelling and depolymerization process of crumb rubber in asphalt, which is crucial for determining the best swelling method for crumb rubber [16,17]. The viscosity and modification mechanism of rubber asphalt were studied by gel permeation chromatography (GPC).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Aging on the Molecular Distribution of Crumb Rubber Modified Asphalt Based on the Gel Permeation Chromatography Test

Wang

Chen

Wang³

et al. 2023

Buildings

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Asphalt aging is one of the main causes of asphalt pavement cracking, loosening and other issues. On a macro level, the asphalt hardens and becomes more brittle, while on a micro level, the chemical composition and molecular weight distribution change. This is a very complicated physicochemical process. Gel permeation chromatography (GPC) is a powerful technical tool for understanding the mechanism of asphalt aging and expressing the asphalt aging process. GPC can be used to measure the distribution and content of each component in the asphalt aging process. The mechanism of action of crumb rubber modified asphalt has not been fully elucidated due to its complex composition. This study investigated the molecular weight of crumb rubber modified asphalt before and after aging, and filtered asphalt based on gel permeation chromatography. The results indicated that crumb rubber itself experiences severe degradation following PAV aging and that a significant number of macromolecular materials are incorporated into the asphalt phase, causing changes in key parameters. The average molecular weight (Mw) and dispersion (D) of crumb rubber modified asphalt are directly related. At the same time, the Mw of crumb rubber modified asphalt has a positive correlation with LMS content, while SMS content has a negative correlation with Mw. The increase in crumb rubber content has a positive impact on the material interaction, and the molecular weight distribution of crumb rubber modified asphalt is affected by the reaction degree of the crumb rubber in asphalt. The complex physical and chemical reaction of crumb rubber in asphalt has a direct impact on the external macro rheological properties of asphalt.

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Statistical modeling of low-temperature properties and FTIR spectra of crumb rubber modified asphalts considering SARA fractions

Cited by 32 publications

References 33 publications

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Analyzing the Mechanical and Durability Characteristics of Steel Slag-Infused Asphalt Concrete in Roadway Construction

The Effect of Aging on the Molecular Distribution of Crumb Rubber Modified Asphalt Based on the Gel Permeation Chromatography Test

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