Feasibility of Concurrent Improvement of Pollutants-Absorption Ability from Surface Runoff and Mechanical Performance of Asphalt Mixtures by Using Photocatalytic Nanomodified Porous Asphalt

Rad, Sina Mousavi; Kamboozia, Neda; Ameri, Mahmoud; Mirabdolazimi, S.M.

doi:10.1061/jmcee7.mteng-14543

Cited by 3 publications

(1 citation statement)

References 72 publications

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“…Sina considered the influence of acidic contaminants on asphalt pavement, prepared porous asphalt mixtures with nano-ZnO and nano-silica and conducted mechanical performance tests on mixtures. The results showed that nanoparticles could remove the acidic contaminants from water and prolong the fatigue lives of porous asphalt mixture [21].…”

Section: Introductionmentioning

confidence: 99%

Study on the Properties and Morphology of Nano-ZnO Modified Asphalt Based on Molecular Dynamics and Experiments

Ding

Zhang

et al. 2023

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Plenty of research has verified that nano-ZnO particles could improve the properties of asphalt, but studies on nano-ZnO-modified asphalt haven’t been conducted at the molecular level. Therefore, to investigate the effect of ZnO particles on the properties, structure and morphology of asphalt, the molecular dynamics (MD) methods were carried out. In this study, the models of asphalt, ZnO cluster and ZnO/asphalt blending systems with different particle sizes were built using Materials Studio software. Then, the interaction energies of ZnO/asphalt blending systems under different temperatures were calculated, and the effect of ZnO particles on the modulus and glass transition temperature of matrix asphalt was simulated. The results indicated that the bulk modulus of asphalt increased by ZnO with particle size at 4 Å, 6 Å, 8 Å and 10 Å increased by 15.09%, 12.46%, 10.06% and 8.51%, respectively, which can illustrate that the shear resistance ability and low-temperature properties of asphalt were enhanced. Compared with matrix asphalt, the glass transition temperature of the ZnO/asphalt system decreased by less than 0.1 K, indicating that ZnO’s effect on the low temperature of asphalt was not apparent. With the increase of ZnO particle size, the diffusion coefficient decreased sharply. Compared to matrix asphalt, when the particle size increased to 8 Å and 10 Å, the diffusion coefficient decreased by 13% and 22%, respectively. So, in practice projects, to achieve better dispersion of particle materials in base bitumen, a smaller particle size would be recommended. The results of the radial distribution function (RDF) and AFM simulation indicated that ZnO particles changed the micro-structure of asphalt and increased the roughness of the asphalt surface. As a result, ZnO particles bring matrix asphalt better physical properties.

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Section: Introductionmentioning

confidence: 99%

Study on the Properties and Morphology of Nano-ZnO Modified Asphalt Based on Molecular Dynamics and Experiments

Ding

Zhang

et al. 2023

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Review on Porous Asphalt Pavements: A Comprehensive Resolution for Stormwater Management and Applications in Current Built Environment

Darshan,

Kataware

2024

Int. J. Pavement Res. Technol.

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The Use of Zinc Oxide in Asphalts: Review

2023

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Zinc oxide (ZnO) is a wide-gap semiconducting material which is chemically stable at high temperatures and has been shown to be compatible with asphalt binders. Additionally, semiconducting nanoparticles such as ZnO could help to improve urban air quality. This has encouraged the use of this material as a binder and asphalt mix modifier. A review on the use of ZnO as an asphalt binder modifier was conducted in this study. Based on the review which we carried out, the following were mainly synthesized and described: the content of ZnO as a modifier, the mixing processes of the binder and the ZnO, the manufacturing process of the modified mix, the type of asphalt binder and/or modified mix, the tests carried out, general conclusions, and environmental effects. ZnO micro-particles increase the aging resistance of the asphalt binder (mainly to ultraviolet radiation (UV)). ZnO tends to increase rutting resistance and adhesion with aggregates, improving resistance to moisture damage. It also tends to improve binder fatigue resistance. At low service temperatures, the performance of ZnO as a modifier is unclear, and further studies should be performed. Few studies have evaluated the effect of ZnO on the environment when it is used as an asphalt binder modifier. Future studies should evaluate the effect of this technology on the environment, perform economic analyses, evaluate the physical–chemical interaction of the modified binder with the aggregate, and measure the long-term properties of asphalt mixtures. ZnO is viewed as an environmentally friendly material and as a promising modifier of asphalt binders for pavement construction.

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Feasibility of Concurrent Improvement of Pollutants-Absorption Ability from Surface Runoff and Mechanical Performance of Asphalt Mixtures by Using Photocatalytic Nanomodified Porous Asphalt

Cited by 3 publications

References 72 publications

Study on the Properties and Morphology of Nano-ZnO Modified Asphalt Based on Molecular Dynamics and Experiments

Study on the Properties and Morphology of Nano-ZnO Modified Asphalt Based on Molecular Dynamics and Experiments

Review on Porous Asphalt Pavements: A Comprehensive Resolution for Stormwater Management and Applications in Current Built Environment

The Use of Zinc Oxide in Asphalts: Review

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