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Related Concept Videos

  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Contribution Of Rubber Modified Asphalt To Emission And Odors Tracing: Experimental And Modelling Investigation.
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Contribution Of Rubber Modified Asphalt To Emission And Odors Tracing: Experimental And Modelling Investigation.

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Contribution of rubber modified asphalt to emission and odors tracing: Experimental and modelling investigation.

Lingwen Li1, Tao Zhou2, Liping Cao2

  • 1School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, PR China; Faculty of Engineering, Department of Civil and Environmental Engineering, University of Auckland, New Zealand.

Journal of Hazardous Materials
|October 29, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

This study identifies key odorants in rubber modified asphalt (RMA) emissions, revealing crumb rubber as a major source. Targeting 4-methyl-dibenzothiophene can mitigate odor and health risks from RMA infrastructure.

Keywords:
Health risk assessmentMacroscopic emission kineticsMicroscopic emission characteristicsOdors tracing

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Area of Science:

  • Environmental Science
  • Material Science
  • Chemical Engineering

Background:

  • Rubber modified asphalt (RMA) offers superior performance in infrastructure.
  • RMA emissions present significant environmental and health concerns, especially in populated areas.
  • Understanding crumb rubber's contribution to RMA emissions is crucial for risk mitigation.

Purpose of the Study:

  • To evaluate emission characteristics and risks of different RMA types and crumb rubber.
  • To identify the specific contributions of crumb rubber to RMA emissions.
  • To provide data-driven guidance for reducing RMA emissions and improving occupational health.

Main Methods:

  • Emission kinetics analysis.
  • Odor assessment.
Rubber modified asphalt
  • Health risk analysis.
  • Identification of key odorants and volatile organic compounds (VOCs).

    • Main Results:

    • RMA emissions of H2S and VOCs follow a bi-exponential function.
    • Cyclic aromatic hydrocarbons and hydrocarbon derivatives (>99%) drive RMA odor.
    • Key odorants include octanal, benzothiazole, and 4-methyl-dibenzothiophene.
    • Crumb rubber is a primary source of VOCs in early emission stages, contributing characteristic odorants like benzothiazole, decanal, and octanal.

    Conclusions:

    • 4-methyl-dibenzothiophene is a critical target for controlling RMA odor and health risks.
    • Crumb rubber significantly influences RMA odor profiles and early-stage emissions.
    • Findings support the development of low-emission RMA materials and improved occupational health standards for sustainable infrastructure.