Recycled plastic modified bitumen: Evaluation of VOCs and PAHs from laboratory generated fumes

Boom, Yeong Jia; Enfrin, Marie; Grist, Stephen; Giustozzi, Filippo

doi:10.1016/j.scitotenv.2022.155037

Cited by 14 publications

(13 citation statements)

References 54 publications

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“…Fumes from asphalt pavement construction are a potential source of adverse environmental effects on human health. Usually, the fumes consist of polyaromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs) [ 65 ]. However, it seems that the fumes are mainly generated from asphalt.…”

Section: Sustainability Of Rubberized Asphaltmentioning

confidence: 99%

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

et al. 2022

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Rubber asphalt has always been considered to have the most potential for the disposal of waste tires as sustainable infrastructure. However, the covalently cross-linked tire rubber presents an extreme challenge in reusing waste rubbers in roads. Rubberized asphalt with finely dispersed or colloidal structure has been regarded as a potential binder used as road material because of the improved properties in terms of storage stability, easy processing and high content of incorporation. However, the mixing mechanism between the finely dispersed rubber on micro-nano scale with asphalt is still not clear, which restricts its further development as value-added material. Devulcanized rubber (DR) was introduced to improve the compatibility between asphalt and rubber. The basic chemicals of DR and asphalt were introduced based on their structures. Furthermore, the interactions between DR and asphalt were discussed according to the functional elements at different levels, and the concept of DR as “the fifth component” of asphalt was put forward. Finally, high performance, environmental and economic effects and applications of devulcanized-rubber-modified asphalt (DRMA) were discussed. The review is expected to provide a guide for the wide application of DRMA, which is still restricted by poor compatibility and bad stability during processing, storage and recycling.

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Section: Sustainability Of Rubberized Asphaltmentioning

confidence: 99%

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

et al. 2022

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“…The complex matrix of bitumen, while consisting predominantly of heavy oil fractions categorized as saturates, aromatics, resins, and asphaltenes, , can emit organic chemicals ranging from low-molecular-weight volatile organic compounds (VOCs) to high-molecular-weight polyaromatic hydrocarbons (PAHs). , Among these are compounds, which include certain PAHs , and VOCs ,− that can exhibit carcinogenesis. As bitumen is a natural product containing variations in its chemical composition, it has been reported that the levels of the emitted VOCs and PAHs can vary notably between samples. , The matrix of bitumen and its unique physiochemical properties have been explored in literature, while the microstructure of bitumen is often modeled as a colloidal structure.…”

Section: Introductionmentioning

confidence: 99%

“…Given its complexity, the effect of the microstructure on emissions and fumes is still poorly understood. While large aromatic systems are present in the asphaltene fractions and large hydrophobic hydrocarbons exist in the mixture, it is unclear how any variations in concentration, molecular structure, and distribution could influence the emission potential of VOCs and PAHs. − The emissions of PAHs and VOCs have been extensively studied and are well established in bitumen. ,,,− The emissions of PAHs and VOCs in bitumen generally remain low, and their emissions are classified as “possibly carcinogenic to humans” (group 2B) by the World Health Organization’s International Agency for Research on Cancer (IARC). In 2011, the IARC working group concluded that there was insufficient evidence to determine the carcinogenicity of hard and straight-run bitumens in humans…”

Section: Introductionmentioning

confidence: 99%

Multimethod Approach to Investigate the Factors Influencing High-Temperature Fuming of Bitumen

Deller,

Grist,

Giustozzi

et al. 2024

ACS Omega

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Bitumen is heated at high temperatures during asphalt paving applications. In these circumstances, there is the possibility for fuming. These fumes can vary in intensity and, if significant, may attract complaints. The bitumen's chemical composition depends on the crude oil from which it originates. A tool to screen bitumen and evaluate its potential to release fumes would be highly beneficial. In this study, three methods have been employed to investigate a series of bitumen samples that were known to produce complaints by (a) quantifying benzene, toluene, ethylbenzene, and m, o, p-xylene (BTEX), (b) measuring the partition coefficients of these analytes, and (c) measuring the volatile mass of bitumen exposed to isothermal heating. It was found that the concentration of BTEX varied significantly between bitumen samples. The partition coefficients of these analytes are substantially the same between samples. Finally, the volatile mass of each sample varies significantly between samples, independent of bitumen grade or country of origin. These volatile masses correlate strongly with fuming complaints from bitumen and can be used as predictors of bitumen fuming risk.

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“…The properties of bitumen vary with its production and processing procedures. Likewise, the engineering properties of any modified bitumen mix largely depend on the type of materials used for the modification [8]. It has been acknowledged in the literature that the use of neat bitumen would not provide all the needed engineering characteristics for paving and industrial applications, which include resistance to climate and more demanding traffic loads, enough stiffness at high temperatures to resist rutting, and the ability to remain soft and elastic enough at low temperatures to resist thermal cracking [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…However, high susceptibility to cracking due to reduced elasticity at low temperatures and some compatibility problems, especially in plastomers, have limited their applications in concrete/asphalt pavement. Likewise, Bitumen modified with thermosetting polymers produced a polymer-modified bitumen with good adhesive ability, excellent resistance to deformation, excellent fatigue performance, and high stiffness modulus, however, they are not commonly used for pavement application due to rapid deterioration of their technological properties, higher thermal sensitivity, high prices and high quantity of thermosetting polymer (above 10%) that is required to meet standard mechanical properties [8].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Bitumen Modified with Pet Bottles as an Alternative Binder for the Production of Paving Blocks

et al. 2023

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This study considers the utilization of bitumen modified with molten polyethylene terephthalate (PET) waste bottles as an alternative binder in paving blocks. PET waste was used at 2, 4, 6, 8, and 10% to modify bitumen in the production of paving blocks. Compressive strength test and skid resistance test were conducted on the paving block samples to evaluate their mechanical strength properties, while water absorption and the Cantabro abrasion tests were carried out to ascertain the durability of the paving block samples. The PET-modified bitumen paving blocks (PMBPB) have enhanced compressive strength and skid resistance compared to unmodified bitumen paving blocks. Also, a significant reduction in water absorption rate of up to 56% was achieved in PET-modified bitumen paving blocks (PMBPB) compared to the unmodified sample. The abrasion loss in the PMBCB samples was the least compared to that in normal cement paving blocks and unmodified bitumen paving blocks. The maximum compressive strength and least water absorption for the PET-modified bitumen concrete paving blocks were obtained at a 10% PET replacement level. It can be concluded that enhanced compressive strength and durability in cement paving blocks and unmodified bitumen paving blocks could be achieved with the use of PET modified bitumen in concrete paving block production, and this will also encourage PET waste recycling and contribute meaningfully to sustainability in concrete paving block production. Doi: 10.28991/CEJ-2023-09-01-08 Full Text: PDF

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Recycled plastic modified bitumen: Evaluation of VOCs and PAHs from laboratory generated fumes

Cited by 14 publications

References 54 publications

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

Characterization, Properties and Mixing Mechanism of Rubber Asphalt Colloid for Sustainable Infrastructure

Multimethod Approach to Investigate the Factors Influencing High-Temperature Fuming of Bitumen

Utilization of Bitumen Modified with Pet Bottles as an Alternative Binder for the Production of Paving Blocks

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