Recycle of discarded masks in civil Engineering: Current status and future opportunities with silane coupling agent modified discarded masks

Construction and Building Materials, Journal Year: 2023, Volume and Issue: 405, P. 133266 - 133266

Published: Sept. 16, 2023

Language: Английский

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Recycled Surgical Mask Waste as a Resource Material in Sustainable Geopolymer Bricks

Recycling, Journal Year: 2023, Volume and Issue: 8(6), P. 93 - 93

Published: Nov. 19, 2023

With the advent of COVID-19 pandemic, global consumption single-use surgical masks has risen immensely, and it is expected to grow in coming years. Simultaneously, disposal environment caused plastic pollution, therefore, exigent find innovative ways handle this problem. In study, were processed a laboratory using mechanical grinding method obtain recycled (RSM). The RSM was added doses 0%, 1%, 2%, 3%, 4% by volume geopolymer bricks, which synthesized with ground granulated blast furnace slag (GGBS), rice husk ash (RHA), sand, sodium silicate (Na2SiO3) at ambient conditions for duration 28 days. developed bricks tested compressive strength, flexural density, water absorption, efflorescence, drying shrinkage. results study reveal that strength improved inclusion bricks. highest values 5.97 MPa 1.62 RSM, respectively. Further, reduction self-weight noticed an increase RSM. There no pronounced effect on absorption efflorescence properties. However, played role reducing shrinkage sustainability analysis divulges catalytic improving material performance, thereby proving be potential candidate low-carbon construction industry.

Language: Английский

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Assessing performance of alkali-activated bricks incorporated with processed surgical masks

Journal of Materials Research and Technology, Journal Year: 2023, Volume and Issue: 25, P. 6432 - 6445

Published: July 1, 2023

Since last few years the world is facing tremendous surge in use of surgical masks due to COVID19 pandemic. The uncontrolled disposal environment will pose serious threat living organisms plastic pollution. On other hand, construction industry hugely dependent on natural resources, leading increase carbon footprint. Therefore, it necessary investigate novel materials with sustainability perspective. In present study, alkali-activated bricks were synthesized rice husk ash (RHA), ground granulated blast furnace slag (GGBFS), sand, and sodium silicate (SS). To this, processed (PSM) added varying doses 0%, 1%, 2%, 3%, 4% by volume mix. results revealed that addition PSM significantly improved strength properties a maximum compressive 6.85 MPa at inclusion PSM. At same time, has reduced density minimum value 1.54 g/cm3 incorporation slightly increased water absorption porosity bricks, 4.76% 7.75% for PSM, when compared 0% respectively. accelerated ageing test showed after three cycles wetting drying exhibited loss range 55.2% 58.6%. microstructure bridging effect fibrous mask particles improving load transfer polymer matrix, thereby reducing brittle tensile failure bricks. pushover analysis benefit performance infill walls improvement brick reduction its self-weight, therefore, can be considered as potential material buildings seismically vulnerable areas.

Language: Английский

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Axial compressive and cyclic lateral behavior of a structural masonry prism constructed from crushed COVID‐19 face masks concrete bricks

Engineering Reports, Journal Year: 2024, Volume and Issue: 6(11)

Published: April 18, 2024

Abstract Discarded medical face masks endanger the environment worldwide. In this study, experiments were conducted to investigate effect of a shredded mask (SFM) at 0% (control mix), 0.5%, 1.0%, and 2.0% by volume concrete in form pieces that 1 cm wide 2 long on properties fresh hardened concrete. After performing experimental testing materials, finite element masonry prisms with dimensions 400 × 200 560 mm 3 modeled ANSYS platform. Four different fabric contents numerically examined study compressive behavior, 12 three mortar joints analyzed under an incremental horizontal load presence four vertical displacements 0.5, 1.0, 3.0, 4.5 mm. The results revealed increasing SFM content led decrease properties, including density, slump, split‐tensile strength, 9.5%, 20%, 24%, 34%, respectively, compared control 0.5%. Moreover, addition 0.5% SFMs prism bricks reduced maximum load, deflection, strain energy 10%, 39%, respectively. Altering type affected lateral cyclic behavior prisms. Compared M3 subjected same axial displacement, M2 had 21.36%, 11%, 27.2%, 10.48% higher peak equivalent stress, energy, Furthermore, stiffness increases as pressure increases. measured displacement was raised 60%, 142%, 182%, 0.5 displacement. outcome provides feasible concept for reusing construction controllable strength deterioration recycled SFM, resulting attractive responses these composites nonstructural scale

Language: Английский

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Quantitative study of triboemission kinetics from polymer fiber-reinforced mortar paving blocks: Unravelling the dynamics of nanoparticle aerosol release

Cement and Concrete Research, Journal Year: 2024, Volume and Issue: 185, P. 107650 - 107650

Published: Aug. 27, 2024

Language: Английский

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Potential Use of COVID-19 Surgical Masks and Polyethylene Plastics in Developing Sustainable Concrete

Journal of Composites Science, Journal Year: 2023, Volume and Issue: 7(9), P. 402 - 402

Published: Sept. 20, 2023

Managing disposable waste surgical face masks and plastic made from polyethylene (PE) resin is a real challenge. Thus, these are considered great threat to the environment. Generally, of microplastic polypropylene materials. Both PE not easily decomposable in soil. Consequently, presence materials can have detrimental effects on terrestrial aquatic ecosystems, exacerbating ongoing crisis faced by animal kingdom broader biosphere. Hence, it imperative identify alternate efficient methods for management. Given its significant economic importance, construction industry holds prominent position among many industries globally. within sector might assume crucial role mitigating pollution. Concrete, one most widely used materials, being adapted with various as partial or complete substitutes natural constituents, such cement aggregates. This study focused using different percentages COVID-19 fiber form replacements coarse aggregates producing sustainable concrete. Mask fibers were concrete production at 0%, 0.5%, 1%, 1.5%, 2% total volume Similarly, replaced 5%, 10%, 15% The results showed that strength reduced mask increased. However, crack-bridging capability still acceptable some structural non-structural applications. obtained this research could also help engineers design fibers.

Language: Английский

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Management of COVID-19 healthcare waste based on the circular economy hierarchy: A critical review

Waste Management & Research The Journal for a Sustainable Circular Economy, Journal Year: 2023, Volume and Issue: 42(11), P. 977 - 996

Published: Sept. 27, 2023

The overall objective of this work was to conduct a critical literature review on the application circular economy (CE) hierarchy for management COVID-19 healthcare waste (HCW). To describe problem created by HCW, first, subsystems system, including generation, segregation, classification, storage, collection, transport, treatment and disposal, were reviewed briefly described. Then, CE using 10R typology adapted HCW included strategies Refuse, Reduce, Resell/Reuse, Repair, Reprocess, Refurbish, Remanufacture, Repurpose, Recycle Recover (energy). Disposal added as sink residues from strategies. Using detailed is novelty review. It concluded that R-strategy selection depends its position in medical item criticality value. Indicative components, which can be managed each R-strategy, compiled, but creating value recovering infectious downgraded materials contaminated with body fluids tissues not currently possible. Therefore, after applying solutions, end pipe disposal would necessary close material cycles at their life cycles. Addressing risks, knowledge gaps policy recommendations article may help combat future pandemics without environmental crises.

Language: Английский

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Disposable Face-Mask Waste Management and Assessment Through Willingness to Pay and SWOT Framework in Post COVID-19 Pandemic

International Journal of Design & Nature and Ecodynamics, Journal Year: 2023, Volume and Issue: 18(1), P. 107 - 115

Published: Feb. 28, 2023

Disposable masks are widely used during the pandemic and post-pandemic as selfprotection from COVID-19.Due to this, a mask waste disposal problem has happened throughout world, impacting environment through pollution.Disposable management using Willingness Pay (WTP) system can be mitigation effort.The study was conducted an online cross-sectional questionnaire which analyzed Spearman method SPSS cross tab descriptive analysis technique.The results of found that there is positive correlation in community's approval for with WTP response, had negative impact on environment.However, it negatively correlated amount budget issued by community WTP.A SWOT (Strength, Weakness, Opportunity, Threat) proposed evaluate system, finding important educate public about impacts.Therefore, applied because advantages small large scale.

Language: Английский

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Decontamination of a surgical mask with UV-C irradiation: Analysis of experimental results with optical simulations

Applied Optics, Journal Year: 2024, Volume and Issue: 63(25), P. 6523 - 6523

Published: Aug. 21, 2024

The suitability of ultraviolet-C (UV-C) irradiation for the decontamination a surgical face mask was studied by experiments and carried out using Staphylococcus aureus MS2 microbes. A moderate dosage level 0.22J/cm 2 achieved within min led to an over 6-log 10 reduction in viable microbe contamination inner filtering layer. underlying reason this effective fibers with small external UV-C explored ray-tracing optical simulations, supported measurements on reflection transmission. model 3D fiber network constructed from X-ray tomography images layered structure consisting polypropylene fibers. Both simulations indicated that UV light able penetrate even deepest material regions. show that, despite radiation outer layer, microbes actual layer are affected increased probability due multiple refraction scattering

Language: Английский

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The Impacts of Medical Textile Waste After COVID-19: Reviewing Challenges and Potential Solutions

Materials Circular Economy, Journal Year: 2023, Volume and Issue: 5(1)

Published: July 27, 2023

Language: Английский

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