Evaluation on the use of COVID-19 single-use face masks to improve the properties of hot mix asphalt

Goli, Ahmad; Sadeghi, Peyman

doi:10.1080/14680629.2022.2072376

Cited by 21 publications

(14 citation statements)

References 48 publications

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“…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 ]. Goli et al investigated the effects of different amounts and sizes of DM on the cracking resistance, fatigue resistance and rutting resistance of asphalt mixes, and the results showed that the effect of 12 mm long fibers was superior [ 12 ]. It is worth noting that although the performance of discarded-mask-modified asphalt has been studied to some extent, the microscopic modification mechanism is not clear.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…This result suggests that awareness of the effectiveness and safety of various recycling options should be increased. For example, studies found that the addition of single-use masks materials to asphalt mixtures is safe and improves the performance of asphalt ( Goli & Sadeghi, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Determinants of proper disposal of single-use masks: knowledge, perception, behavior, and intervention measures

Petrescu

Kopaei

Petrescu-Mag

et al. 2023

PeerJ

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Background Although many studies testify to consumer behavior’s role in the context of waste-related sustainability objectives, little research examined what people know, think, and feel about the environmental impacts of their personal protective equipment (PPE) or their behavior towards them, in general. Therefore, the present article complements existing information about the public perceptions, knowledge, and behavior of single-use masks in a context where the pandemic has put increasing pressure on waste management public services. From February to June 2020, municipal solid waste increased ten times in Romania. The study identified the factors that predicted the proper disposal of single-use masks and the measures preferred to prevent or minimize the negative impact of single-use mask waste. Method Data from a representative sample of 705 Romanians were collected using a structured questionnaire. The data were analyzed with SPSS and SmartPLS. The Cochran’s Q test was run to determine the existence of differences between percentages of people who preferred various measures. Dunn’s test with a Bonferroni correction was used to identify the exact pair of groups where the differences were located. The study utilized structural equation models (SEM) based on at least partial squares with SmartPLS software (3.2.8) to investigate causal links between constructs. The model considered that the dependent variable (environmentally friendly behavior: proper disposal of single-use masks) could be influenced by the knowledge, perception, behavior, and demographics variables. Results The findings indicated that knowledge of the type of material of single-use masks had a direct positive (β = 0.173) and significant effect on their proper disposal. The perception of mask waste impact has a negative and significant (β = −0.153, p < 0.001) impact on the proper disposal of single-use masks. This path coefficient illustrates that the worse the perceived impact of single-use masks on waste management activity, the higher the proper disposal of single-use masks. Gender has a positive (β = 0.115) and significant (p < 0.001) effect on the proper disposal of single-use masks. Conclusions It was concluded that the 5Rs waste management approach should be reconsidered for single-use mask waste. For example, “Reuse” and the classic “Recycle” have limited applications since they may lead to virus transmission and possible infection. “Reducing” the use of single-use masks could have repercussions on one’s health. Summing up, the study outlined recommendations for effective interventions for the proper disposal of single-use masks from the perspective of behavioral studies.

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“…The samples were kept in a chamber at 50 • C for 4 h. Then, two cylindrical samples were fixed in plastic molds and subjected to a rut wheel with a diameter of 203 mm and a width of 47 mm [73]. After 10,000 loading cycles under a force of 705 ± 4 N and a passing speed of 0.305 m/s, the rutting depth was measured [31].…”

Section: Hamburg Wheel-track Testmentioning

confidence: 99%

“…Therefore, virgin asphalt and modified polymer bitumen in combination with rejuvenated RAP are suggested. The rutting performance of asphalt mixtures has been improved using polymers such as polyethylene (PE) [27,28], polyethylene terephthalate (PET) [29,30], and polypropylene (PP) [31]. Despite the proper performance of polymers in asphalt mixtures, producing these materials has become a serious environmental concern.…”

Section: Introductionmentioning

confidence: 99%

Carbon Sequestration via Bituminous Composites Containing Recycled High-Density Polyethylene

Sadeghi,

Goli,

Fini

2024

J. Compos. Sci.

Self Cite

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This paper presents an innovative bituminous composite containing recycled high-density polyethylene (HDPE) as a means of carbon sequestration. To prepare the composite, rejuvenators and recycled HDPE were introduced to reclaimed asphalt pavement (RAP), separately and in combination. To evaluate efficacy of rejuvenators, this study used the following three rejuvenators: waste engine oil (WEO), oleic acid (OA), and vacuum bottom (VB). The performance of the bituminous composite containing HDPE and rejuvenators was evaluated using the indirect tensile fatigue test, the rutting resistance test, the resilient modulus test, and the semi-circular bending test. Results showed that applying a combination of rejuvenators and recycled HDPE improved the resistance to fatigue, rutting, and cracking. Particularly, in terms of improving resistance to cracking, OA proved to be the most effective rejuvenator, followed by WEO and VB. In all bituminous composites studied here, the hybrid application of HDPE and rejuvenator proved to be more effective than the rejuvenator or HDPE alone.

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Evaluation on the use of COVID-19 single-use face masks to improve the properties of hot mix asphalt

Cited by 21 publications

References 48 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

Determinants of proper disposal of single-use masks: knowledge, perception, behavior, and intervention measures

Carbon Sequestration via Bituminous Composites Containing Recycled High-Density Polyethylene

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