Laboratory evaluation of PAH and VOC emission from plastic-modified asphalt

Boom, Yeong Jia; Enfrin, Marie; Lu, Dai Xuan; Grist, Stephen; Robert, Dilan; Giustozzi, Filippo

doi:10.1016/j.jclepro.2022.134489

Cited by 19 publications

(5 citation statements)

References 44 publications

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“…In an interesting study, researchers investigated the laboratory-generated fumes from recycled plastic-modified asphalt [ 100 ]. The recycled plastics used were r-LDPE, r-ABS, r-PET, and commingled plastics, and VOCs emissions were analysed by GC-MS studies.…”

Section: Analysis Of Voc Emissionsmentioning

confidence: 99%

A Review of Weathering Studies in Plastics and Biocomposites—Effects on Mechanical Properties and Emissions of Volatile Organic Compounds (VOCs)

Nzimande,

Mtibe,

Tichapondwa

et al. 2024

Polymers

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Polymeric materials undergo degradation when exposed to outdoor conditions due to the synergistic effects of sunlight, air, heat, and moisture. The degradation can lead to a decline in mechanical properties, fading, surface cracking, and haziness, attributed to the cleavage of the polymer chains and oxidation reactions. Accelerated weathering testing is a useful technique to evaluate the comparative photodegradation of materials within a reasonable timeframe. This review gives an overview of the different degradation mechanisms occurring in conventional plastics and bio-based materials. Case studies on accelerated weathering and its effect on the mechanical properties of conventional plastics and biocomposites are discussed. Different techniques for analysing volatile organic emissions (VOCs) have been summarized and studies highlighting the characterization of VOCs from aged plastics and biocomposites after aging have been cited.

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Section: Analysis Of Voc Emissionsmentioning

confidence: 99%

A Review of Weathering Studies in Plastics and Biocomposites—Effects on Mechanical Properties and Emissions of Volatile Organic Compounds (VOCs)

Nzimande,

Mtibe,

Tichapondwa

et al. 2024

Polymers

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“…Using the mixer, the RAB sample was heated at 135 • C to a fluid condition, and then the addition of RH was mixed at 2500 rpm rotation speed for 30 min to ensure the RH was completely dispersed in the asphalt binders [36,37]. The blending of RAB and RH samples was formed by combining 10% and 30% (by weight) of RH, which were remarked as R9H1 and R7H3, respectively.…”

Section: Preparation Of Rab and Rh Blendsmentioning

confidence: 99%

Reutilization of Reclaimed Asphalt Binder via Co-Pyrolysis with Rice Husk: Thermal Degradation Behaviors and Kinetic Analysis

Zhao,

Mi,

et al. 2023

Materials

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Realizing the utilization of reclaimed asphalt binder (RAB) and rice husk (RH) to reduce environmental pollution and expand the reutilization technique of reclaimed asphalt pavement (RAP), co-pyrolysis of RAB with RH has great potential. In this study, the co-pyrolysis behaviors, gaseous products, and kinetics were evaluated using thermogravimetric analysis and Fourier transform infrared spectroscopy (TG-FTIR). The results showed that incorporating RH into RAB improved its pyrolysis characteristics. The interactions between RAB and RH showed initial inhibition followed by subsequent promotion. The primary gaseous products formed during co-pyrolysis were aliphatic hydrocarbons, water, and carbon dioxide, along with smaller amounts of aldehydes and alcohols originating from RH pyrolysis. All average activation energy values for the blends, determined through iso-conversional methods, decreased with RH addition. The combined kinetic analysis revealed two distinct mechanisms: (1) at the lower conversion range, the pyrolysis of the blend followed a random nucleation and three-dimensional growth mechanism, while (2) at the higher conversion range, the control mechanism transitioned into three-dimensional diffusion.

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“…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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Laboratory evaluation of PAH and VOC emission from plastic-modified asphalt

Cited by 19 publications

References 44 publications

A Review of Weathering Studies in Plastics and Biocomposites—Effects on Mechanical Properties and Emissions of Volatile Organic Compounds (VOCs)

A Review of Weathering Studies in Plastics and Biocomposites—Effects on Mechanical Properties and Emissions of Volatile Organic Compounds (VOCs)

Reutilization of Reclaimed Asphalt Binder via Co-Pyrolysis with Rice Husk: Thermal Degradation Behaviors and Kinetic Analysis

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

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