Functionalized Waste Plastic Granules to Enhance Sustainability of Bituminous Composites

Aldagari, Sand; Kabir, Sk Faisal; Lamanna, Anthony J.; Fini, Elham H.

doi:10.1016/j.resconrec.2022.106353

Cited by 20 publications

(13 citation statements)

References 54 publications

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“…The shear-thinning zone of viscosity with respect to shear rate is linked to the molecular interaction of the bitumen matrix: higher interaction is associated with a steeper shear-thinning slope. A steeper shear-thinning value (power-law slope) indicates greater interaction between the bitumen and the glass beads …”

Section: Methodsmentioning

confidence: 99%

Bio-Modifier: A Sustainable Suturing Technology at the Bitumen–Aggregate Interface

Shariati

Aldagari

Fini

2023

ACS Sustainable Chem. Eng.

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Premature failure at the bitumen−aggregate interface is attributed to the surface chemistry of stone aggregates. Bitumen modifiers with high affinity toward aggregates are often used to change the surface chemistry of aggregates, which in turn changes the type and strength of stones' interactions with bitumen.Here, the mechanisms of action and the effects of an organosilane and bio-oil separately on the bitumen−aggregate interface, including their binding to aggregates from one side and to bitumen from the other side, were studied and compared. The binding of bio-oils and organosilanes to aggregates is well documented, as well as their efficacy as anti-stripping agents, but their binding to bitumen is not well understood. Using glass beads as a surrogate for siliceous stones, we obtained laboratory measurements of interfacial strength as measured by resistance to shear forces at the interface of bitumen and silica. Our laboratory measurements showed the highest value for the bitumen modified with bio-oil, followed by the control bitumen with no modification, and the lowest value for the bitumen modified with organosilane. Our molecular modeling calculations showed that the adhesion of bitumen molecules to silica coated with bio-oil was notably stronger (up to 72%) than the adhesion of bitumen molecules to silica coated with organosilane. The higher interfacial strength observed for bitumen with bio-oil is attributed to bio-oil having various functional groups with the ability to form hydrogen bonds and π−π interactions with the aromatic and polar components of bitumen. The study outcomes highlight the importance of modifiers' ability to strongly interact with both aggregates and bitumen. The bio-oil modifier introduced in this work can form a robust bridge between bitumen and siliceous aggregates to improve the adhesive properties, enhancing the sustainability and durability of bituminous composites.

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Section: Methodsmentioning

confidence: 99%

Bio-Modifier: A Sustainable Suturing Technology at the Bitumen–Aggregate Interface

Shariati

Aldagari

Fini

2023

ACS Sustainable Chem. Eng.

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“…[47,48] Therefore, functionalizing PET is a treatment to increase PET's compatibility in an asphalt mixture and consequently the homogenous distribution of PET in the bitumen, diminishing the phase separation of PET-modified bitumen. [44,49] The surface treatment of PET granules contributes to increasing the intermolecular interactions between PET granules and bitumen along with increasing the interactions at the plastic-aggregate interface. This wellstructured bridging between PET particles and asphalt components causes a more uniform and stronger molecular network in the asphalt mixture, enhancing the forces of adhesion and cohesion.…”

Section: Introductionmentioning

confidence: 99%

“…Bitumen modified with functionalized PET showed better resistance against stripping, low-temperature cracking, moisture damage, and oxidation. [33,36,44,49] PET functionalization with waste vegetable oil (WVO) improves compatibility by enhancing intermolecular interactions, leading to a reduction in phase separation of the PET granules from bitumen. [44,49] It has been reported that bitumen modified with WVO-treated PET showed better performance and durability compared to bitumen containing non-treated PET.…”

Section: Introductionmentioning

confidence: 99%

“…[33,36,44,49] PET functionalization with waste vegetable oil (WVO) improves compatibility by enhancing intermolecular interactions, leading to a reduction in phase separation of the PET granules from bitumen. [44,49] It has been reported that bitumen modified with WVO-treated PET showed better performance and durability compared to bitumen containing non-treated PET. [33,44,49] In this study, we use both biochar and waste PET granules as asphalt modifiers to design a new asphalt modifier.…”

Section: Introductionmentioning

confidence: 99%

“…[44,49] It has been reported that bitumen modified with WVO-treated PET showed better performance and durability compared to bitumen containing non-treated PET. [33,44,49] In this study, we use both biochar and waste PET granules as asphalt modifiers to design a new asphalt modifier. Here, PET granules are used as a carrier for biochar to introduce it into bitumen.…”

Section: Introductionmentioning

confidence: 99%

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Bio‐Carbon as a Means of Carbon Management in Roads

Pahlavan

Aldagari

Park

et al. 2023

Advanced Sustainable Systems

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This paper introduces biocarbon, referred to as biochar, as a novel eco‐friendly and cost‐effective additive to increase interactions among bitumen components while facilitating carbon management in roadway infrastructures. It is hypothesized that functional groups on biochar surfaces enhance interactions between biochar and bitumen constituents. This in turn enhances mechanical properties and durability of asphalt pavements. This study uses biochars derived from six different types of woody biomass and one type of algae, and polyethylene terephthalate granules as a carrier to introduce biochar to bitumen. Quantum‐based molecular modeling and noncovalent interaction analysis show that algal biochar interacts more effectively with bitumen components. The enhanced interaction of algal biochar is attributed to its surface functional groups including reactive nitrogen‐ and oxygen‐carrying functional groups. The rheological characterization of bitumen doped with different biochars confirms that the lowest separation index occurs for bitumen containing algal biochar, which also exhibits the highest percent of elastic recovery and resistance to permanent deformation. The study suggests that asphalt pavement durability can be enhanced by selection of the proper biochar to increase intermolecular interactions. Promising results for the algae biochar promote its use in carbon management for roadway infrastructure by sequestering CO2 from air through photosynthesis of algae biomass.

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Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

Gedik

Ozcan

Özcanan

2023

Environ Sci Pollut Res

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Disposable medical gloves (DMGs) have long been used to mitigate the risk of direct exposure to diverse microorganisms and body fluids; hence, they are a critical weapon to protect patients and healthcare staff from infectious diseases. Measures to control the spread of COVID-19 have sparked the production of an excessive number of DMGs, most of which are eventually being disposed of in landfills. Untreated DMGs in landfills do not only pose a direct risk of transmitting coronavirus and other pathological germs but also pollute air, water, and soil dramatically. As a healthier alternative, recycling discarded polymer-rich DMGs into bitumen modification is considered to be a prospective waste management strategy applicable to the asphalt pavement industry. In this study, this conjecture is tested by examining two common DMGs — latex gloves and vinyl gloves — at four different percentages (1%, 2%, 3%, and 4% by weight). The morphological characteristics of DMG-modified specimens were inspected by using a high-definition scanning electron microscope (SEM) equipped with an energy dispersive X-ray analyzer (EDX). A wide range of laboratory tests including penetration, softening point temperature, ductility, and elastic recovery were undertaken to evaluate the impact of waste gloves on the conventional engineering properties of bitumen. Moreover, viscoelastic behavior and modification processing were studied by conducting the dynamic shear rheometer (DSR) test and the Fourier transform infrared spectroscopy (FTIR) analysis. Test results have revealed the outstanding potential of recycled DMG waste for modifying neat asphalt binder. More specifically, bitumens modified with 4% latex glove and 3% vinyl glove were seen as capable of superiorly withstanding permanent deformations caused by heavy axle loads at high service temperatures. Furthermore, it has been shown that 1.2 tons of modified binder would embed approximately 4000 pairs of recycled DMGs. This study shows that DMG waste can be used as a viable modifier, which would help open a new avenue for mitigating the environmental pollution arising from the COVID-19 pandemic. Graphical Abstract

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Functionalized Waste Plastic Granules to Enhance Sustainability of Bituminous Composites

Cited by 20 publications

References 54 publications

Bio-Modifier: A Sustainable Suturing Technology at the Bitumen–Aggregate Interface

Bio-Modifier: A Sustainable Suturing Technology at the Bitumen–Aggregate Interface

Bio‐Carbon as a Means of Carbon Management in Roads

Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

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