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 28 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

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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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Kazemi

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Advanced Sustainable Systems

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This study introduces a novel biogenic catalyst derived from silver grass (SG) that could revolutionize sulfur polymerization, addressing the critical challenge of sulfur waste management. The oil refining industry generates large quantities of sulfur byproducts, which pose significant environmental risks. Inverse vulcanization offers a promising method to convert this waste into valuable polymers, but it traditionally relies on costly and environmentally harmful catalysts. The development of benign, sustainable catalysts is essential to making sulfur polymerization more eco‐friendly and scalable. This research demonstrates the effectiveness of the SG biogenic catalyst compared to the conventional chemical catalyst zinc diethyldithiocarbamate (Zn(DTC)2). Rheological characterizations reveal that the SG catalyst not only outperforms Zn(DTC)2 at elevated temperatures but also provides superior moisture resistance, enhancing polymer durability. Additionally, the SG‐catalyzed polymer exhibits better elasticity and structural integrity under mechanical stress. A density functional theory (DFT)‐based study further supports these findings, showing that the SG biochar matrix enables stronger Zn‐S coordination, resulting in improved polymer properties. These results highlight the potential of this biogenic catalyst to revolutionize sulfur polymerization, paving the way for more sustainable practices in the chemical industry by converting waste sulfur into valuable polymer resources.

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Functionalized Waste Plastic Granules to Enhance Sustainability of Bituminous Composites

Cited by 28 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

Revolutionizing Sulfur Polymerization with a Biogenic Catalyst Approach

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