New preparation method of bitumen samples for UV aging behavior investigation

Sun, Xiaolong; Qin, Xiao; Liu, Zhisheng; Yin, Yingmei; Zou, Chao; Jiang, Shuo

doi:10.1016/j.conbuildmat.2019.117278

Cited by 38 publications

(13 citation statements)

References 24 publications

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“…Characterization. JSM-6390A scanning electron microscope was used to characterize the micromorphology of the basalt fiber in emulsified asphalt [23][24][25] to reveal the mechanism of the basalt fiber strengthening the adhesion of the macadam seal. e amplification of SEM analysis included 100 and 1500 times.…”

Section: Microscopicmentioning

confidence: 99%

Bonding Performance and Evaluation of Basalt Fiber Asphalt Macadam Seal

Quan

Cao

2020

Advances in Civil Engineering

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To broaden the application of the basalt fiber in the preventive maintenance of asphalt pavement, this study investigated the bonding performance and evaluated the comprehensive performance of the basalt fiber asphalt macadam seal. Firstly, different types of basalt fiber asphalt macadam seal were prepared. The influences of content and length of the basalt fiber and dosage of emulsified asphalt on the bonding performance of the asphalt macadam seal were analyzed and compared. Next, by using the efficacy coefficient method, comprehensive performance considering both mechanical and economic characteristics of the basalt fiber asphalt macadam seal was evaluated. After that, reasonable content of each material was determined. Finally, the strengthening mechanism of the fiber on the bonding performance of macadam seals was revealed from a microscopic view. The results showed that compared with the ordinary asphalt macadam seal, the loss aggregate rate of the basalt fiber asphalt macadam seal was 11.0–30.5% lower, and the pull-out strength, shear strength, and torsional shear strength were 11.7–16.3%, 9.7–22.4%, and 4.2–20.6% higher, respectively. Considering the bonding performance and economic benefits, the optimal amount of emulsified asphalt and basalt fiber was 1.6 kg/m2 and 70 g/m2, respectively. Basalt fiber increased the cohesion of the asphalt material and improved the bonding performance of asphalt macadam seals through formation of the three-dimensional network structure. This study can provide reference to the application of basalt fibers in asphalt pavement maintenance.

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Section: Microscopicmentioning

confidence: 99%

Bonding Performance and Evaluation of Basalt Fiber Asphalt Macadam Seal

Quan

Cao

2020

Advances in Civil Engineering

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“…Intense UV radiation would induce and encourage the aging of asphalt pavements, which is one of the most challenging issues in the feld of pavement construction [1,2]. For mitigating the ultraviolet aging behavior of asphalt material, the common and efective method is to add antiultraviolet aging additives to the asphalt binder [3,4]. Te commonly used antiultraviolet additives are carbon black, AW, and BLE [5,6].…”

Section: Introductionmentioning

confidence: 99%

Rheological Properties and Microscopic Characterization of Delayed Decay-Modified Asphalt Based on UV Ageing

Zhu²,

Zhu

et al. 2023

Advances in Materials Science and Engineering

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For clarifying the applying feasibility of hindered amine light stabilizers in asphalt binder, two types of hindered amine light stabilizers were chosen as a UV ageing resistance modifier and the modified asphalt was prepared with a selected UV ageing resistance modifier. The ultraviolet aging testing method of asphalt materials was proposed for UV ageing behavior characterization. Under the condition of different frequencies, the impact of UV ageing resistance modifier on asphalt was investigated through using the frequency sweep test of DSR. Under the effect of ultraviolet aging, the variation of thermal properties of UV ageing resistance-modified asphalt was deeply analyzed by means of a temperature scanning test of DSR following the increase of temperature. The change law of the surface morphology of light stabilizer-modified asphalt was characterized by atomic force microscopy (AFM) dynamically with the UV aging time extension. The research results showed that the hindered amine light stabilizer could improve the high temperature performance of asphalt and achieve the UV aging behavior of asphalt materials effectively. Meanwhile, the corresponding reaction mechanism was explored at the microscopic level.

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“…At high altitude areas, aging of asphalt becomes faster and more severe under UV radiation [8]. Studies based on Fourier transform infrared (FTIR) spectroscopy indicate that a large number of polar oxygen-containing groups, such as carbonyl (mainly ketones and aldehydes) and sulfoxide groups, as well as small amounts of carboxylic acids, dicarboxylic anhydrides, and hydroxyl groups, are produced during asphalt aging [9,10]. As a result, the molecular polarity and intermolecular agglomeration of aged asphalt increases and the thermodynamic equilibrium between SARA components is irreversibly disrupted, which makes asphalt hard, brittle, and difficult to flow, resulting in asphalt pavement cracking more easily under load [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Comparative Investigation on the Properties and Molecular Mechanisms of Natural Phenolic Compounds and Rubber Polymers to Inhibit Oxidative Aging of Asphalt Binders

Yang

2022

Advances in Materials Science and Engineering

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Using bio-based antioxidants and industrial wastes to inhibit asphalt aging is a sustainable practice in the pavement industry. To investigate the inhibitory effects and potential mechanisms of phenolic compounds and crumb tire rubber on the aging deterioration of asphalt binders, the aging characteristics of base asphalt, catechin modified asphalt, and crumb rubber modified asphalt were evaluated using Fourier transform infrared spectroscopy and reactive molecular dynamics simulations. The results showed that both catechins and crumb rubber exerted resistance to asphalt aging and that the former performed better. Specifically, catechins block asphalt aging at the chemical level by providing active H atoms to react with O2 and free radicals, thus preventing them from oxidizing asphalt molecules. In contrast, crumb rubber exerts its antiaging properties mainly in physical aspects, firstly by limiting the movement of asphalt molecules to reduce the contact and reaction of asphalt with O2 and secondly by counteracting the aging-induced asphalt hardening through its own degradation, thus partially restoring the mechanical properties of aged asphalt. This study provides molecular insight into the antiaging mechanisms of natural phenolic compounds and rubber polymers and is expected to provide theoretical guidance for the development of targeted antiaging technologies for asphalt binders.

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New preparation method of bitumen samples for UV aging behavior investigation

Cited by 38 publications

References 24 publications

Bonding Performance and Evaluation of Basalt Fiber Asphalt Macadam Seal

Bonding Performance and Evaluation of Basalt Fiber Asphalt Macadam Seal

Rheological Properties and Microscopic Characterization of Delayed Decay-Modified Asphalt Based on UV Ageing

Comparative Investigation on the Properties and Molecular Mechanisms of Natural Phenolic Compounds and Rubber Polymers to Inhibit Oxidative Aging of Asphalt Binders

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