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A Study on Radiation Cooling Effect on Asphalt Concrete Pavement Using Basic Oxygen Furnace Slag to Replace Partial Aggregates

Author

Listed:
  • Yeou-Fong Li

    (Department of Civil Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 10608, Taiwan)

  • Po-An Yang

    (Department of Civil Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 10608, Taiwan)

  • Chia-Ho Wu

    (Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

  • Ta-Wui Cheng

    (Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan)

  • Chih-Hong Huang

    (Department of Architecture, National Taipei University of Technology, Taipei 10608, Taiwan)

Abstract

In this study, aggregates in asphalt concrete were partially replaced by basic oxygen furnace slag (BOFS) in proportions of 45 wt.%, 55 wt.%, and 75 wt.%. The thermal performances of the specimens are discussed based on the thermal conductivity, emissivity, and the indoor and outdoor temperature measurements. Consequently, 75 wt.% of the specimen’s aggregates were replaced by BOFS, which had a high emissivity of 0.86 across the sky window. In the indoor and outdoor tests, the temperature change was recorded to estimate the thermal performance of specimens. According to the quantitative calculation, when the substitution of BOFS was higher than 55 wt.%, the specimens had a better radiation cooling ability. Among these specimens, the specimen with the BOFS substitution of 75 wt.% absorbed the most heat inside the body, contributing to less heat remaining in the environment. Furthermore, because Newton’s cooling energy accounted for about 90% of the stored energy within 7 h, the heat dissipation after the seventh hour was primarily radiation cooling, corresponding to the emission across the urban boundary layer. As for the mechanical properties, the stability value, indirect tensile strength, and British pendulum number (BPN) were in line with the specifications under the proper BOFS substitution. In conclusion, BOFS has great applicability in pavements due to its thermal performance and mechanical properties. It not only achieves the goal of urban heat island mitigation by radiation cooling, but also reflects the concept of resource sustainability.

Suggested Citation

  • Yeou-Fong Li & Po-An Yang & Chia-Ho Wu & Ta-Wui Cheng & Chih-Hong Huang, 2021. "A Study on Radiation Cooling Effect on Asphalt Concrete Pavement Using Basic Oxygen Furnace Slag to Replace Partial Aggregates," Sustainability, MDPI, vol. 13(7), pages 1-25, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:7:p:3708-:d:524714
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    References listed on IDEAS

    as
    1. Chia-Ho Wu & Chih-Hong Huang & Yeou-Fong Li & Wei-Hao Lee & Ta-Wui Cheng, 2020. "Utilization of Basic Oxygen Furnace Slag in Geopolymeric Coating for Passive Radiative Cooling Application," Sustainability, MDPI, vol. 12(10), pages 1-15, May.
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    Cited by:

    1. Fadi Althoey & Md. Akter Hosen, 2021. "Physical and Mechanical Characteristics of Sustainable Concrete Comprising Industrial Waste Materials as a Replacement of Conventional Aggregate," Sustainability, MDPI, vol. 13(8), pages 1-12, April.
    2. Yeou-Fong Li & Walter Chen & Ta-Wui Cheng, 2022. "The Sustainable Composite Materials in Civil and Architectural Engineering," Sustainability, MDPI, vol. 14(4), pages 1-3, February.

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