Influence of pandemic waste face mask on rheological, physical and chemical properties of bitumen

Yalçın, Erkut; Ozdemir, Ahmet Munir; Kök, Baha Vural; Yılmaz, Mehmet; Yilmaz, Bahadır

doi:10.1016/j.conbuildmat.2022.127576

Cited by 25 publications

(16 citation statements)

References 57 publications

(60 reference statements)

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“…The phase angle decreases with the increase of modifier dosing, and the trend of complex modulus is opposite. This is consistent with the findings of previous studies [ 9 , 10 ].…”

Section: Resultssupporting

confidence: 94%

“…Based on the experimental results of FTIR and relevant literature [ 9 , 10 ], polypropylene (PP) is the main component of DM modifier, and this paper uses PP to represent DM modifier for molecular dynamics simulation. Due to limited computational resources, it was not possible to introduce the actual degree of polymerization of PP into the MD simulation.…”

Section: Resultsmentioning

confidence: 99%

“…According to previous study [ 9 , 10 ], the DM modifier dosing was selected as 1%, 2%, 3%, 4% of the total weight of the base asphalt. The preparation process of DM-modified asphalt: firstly, the base asphalt was heated to 165 °C and stirred for 10 min at 500 r/min using a high speed shear machine.…”

Section: Methodsmentioning

confidence: 99%

“…Zhao et al simply crushed the DM and added them to the base asphalt and found that DM could improve the high and low temperature properties of the asphalt [ 9 ]. Yalcin et al found that modified asphalt containing more than 2% DM was better than modified asphalt containing more than 3% SBS in terms of physical properties and rheological performance [ 10 ]. Wang et al melted and crushed DM into fibrous-like form in hot mix asphalt mixtures and found that it can improve the rutting resistance of pavements due to its own structure and stiffness [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Multi-Scale Characterization of High-Temperature Properties and Thermal Storage Stability Performance of Discarded-Mask-Modified Asphalt

Hui

Yang

et al. 2022

Materials

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In the context of the global pandemic of COVID-19, the use and disposal of medical masks have created a series of ethical and environmental issues. The purpose of this paper is to study and evaluate the high temperature properties and thermal storage stability of discarded-mask (DM)-modified asphalt from a multi-scale perspective using molecular dynamics (MD) simulation and experimental methods. A series of tests was conducted to evaluate the physical, rheological, thermal storage stability and microscopic properties of the samples. These tests include softening point, rotational viscosity, dynamic shear rheology (DSR), Fourier transform infrared (FT-IR) spectroscopy and molecular dynamics simulation. The results showed that the DM modifier could improve the softening point, rotational viscosity and rutting factor of the asphalt. After thermal storage, the DM-modified asphalt produced segregation. The difference in the softening point between the top and bottom of the sample increased from 2.2 °C to 17.1 °C when the DM modifier admixture was increased from 1% to 4%. FT-IR test results showed that the main component of the DM modifier was polypropylene, and the DM-modified asphalt was mainly a physical co-blending process. MD simulation results show that the DM modifier can increase the cohesive energy density (CED) and reduce the fractional free volume (FFV) of asphalt and reduce the binding energy between base asphalt and DM modifier. Multi-scale characterization reveals that DM modifiers can improve the high temperature performance and reduce the thermal storage stability of asphalt. It is noteworthy that both macroscopic tests and microscopic simulations show that 1% is an acceptable dosage level.

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“…The phase angle decreases with the increase of modifier dosing, and the trend of complex modulus is opposite. This is consistent with the findings of previous studies [ 9 , 10 ].…”

Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multi-Scale Characterization of High-Temperature Properties and Thermal Storage Stability Performance of Discarded-Mask-Modified Asphalt

Hui

Yang

et al. 2022

Materials

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show abstract

“…The fragmented mask was dispersed in the asphalt to form a partial network structure, and the asphalt had good compatibility with the mask under this process. Thus, the softening point, viscosity, rate of elastic recovery, high-temperature deformation resistance, rutting resistance, and freeze–thaw splitting strength of asphalt were improved (Yalcin et al 2022 ; Zhao et al 2022 ).…”

Section: Physical Recovery Technologymentioning

confidence: 99%

Disposal and resource utilization of waste masks: a review

Cui

Zhang

et al. 2023

Environ Sci Pollut Res

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Waste masks pose a serious threat to the environment, including marine plastic pollution and soil pollution risks caused by landfills since the outbreak of COVID-19. Currently, numerous effective methods regarding disposal and resource utilization of waste masks have been reported, containing physical, thermochemical, and solvent-based technologies. As for physical technologies, the mechanical properties of the mask-based materials could be enhanced and the conductivity or antibacterial activity was endowed by adding natural fibers or inorganic nanoparticles. Regarding thermochemical technologies, catalytic pyrolysis could yield considerable hydrogen, which is an eco-friendly resource, and would mitigate the energy crisis. Noticeably, the solvent-based technology, as a more convenient and efficient method, was also considered in this paper. In this way, soaking the mask directly in a specific chemical reagent changes the original structure of polypropylene and obtains multi-functional materials. The solvent-based technology is promising in the future with the researches of sustainable and universally applicable reagents. This review could provide guidance for utilizing resources of waste masks and address the issues of plastic pollution.

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Effects of Recycled Asphalt Material and Natural Pozzolan as Additives of Hot-Mix Asphalt: A Field Study

Yilmaz,

Şentürk

2024

Int J Civ Eng

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Influence of pandemic waste face mask on rheological, physical and chemical properties of bitumen

Cited by 25 publications

References 57 publications

Multi-Scale Characterization of High-Temperature Properties and Thermal Storage Stability Performance of Discarded-Mask-Modified Asphalt

Multi-Scale Characterization of High-Temperature Properties and Thermal Storage Stability Performance of Discarded-Mask-Modified Asphalt

Disposal and resource utilization of waste masks: a review

Effects of Recycled Asphalt Material and Natural Pozzolan as Additives of Hot-Mix Asphalt: A Field Study

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