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Heat Transfer Measurement within Green Roof with Incinerated Municipal Solid Waste Aggregates

Author

Listed:
  • Mostafa Kazemi

    (GeMMe Building Materials, Urban and Environmental Engineering Division (UEE), University of Liege, 4000 Liège, Belgium)

  • Luc Courard

    (GeMMe Building Materials, Urban and Environmental Engineering Division (UEE), University of Liege, 4000 Liège, Belgium)

  • Julien Hubert

    (GeMMe Building Materials, Urban and Environmental Engineering Division (UEE), University of Liege, 4000 Liège, Belgium)

Abstract

A green roof is composed of a substrate and drainage layers which are fixed on insulation material and roof structure. The global heat resistance (Rc) within a green roof is affected by the humidity content of the substrate layer in which the coarse recycled materials can be used. Moreover, the utilization of recycled coarse aggregates such as incinerated municipal solid waste aggregate (IMSWA) for the drainage layer would be a promising solution, increasing the recycling of secondary resources and saving natural resources. Therefore, this paper aims to investigate the heat transfer across green roof systems with a drainage layer of IMSWA and a substrate layer including recycled tiles and bricks in wet and dry states according to ISO-conversion method. Based on the results, water easily flows through the IMSWAs with a size of 7 mm. Meanwhile, the Rc-value of the green roof system with the dry substrate (1.26 m 2 K/W) was 1.7 times more than that of the green roof system with the unsaturated substrate (0.735 m 2 K/W). This means that the presence of air-spaces in the dry substrate provided more heat resistance, positively contributing to heat transfer decrease, which is also dependent on the drainage effect of IMSWA. In addition, the Rc-value of the dry substrate layer was about twice that of IMSWA as the drainage layer. No significant difference was observed between the Rc-values of the unsaturated substrate layer and the IMSWA layer.

Suggested Citation

  • Mostafa Kazemi & Luc Courard & Julien Hubert, 2021. "Heat Transfer Measurement within Green Roof with Incinerated Municipal Solid Waste Aggregates," Sustainability, MDPI, vol. 13(13), pages 1-12, June.
  • Handle: RePEc:gam:jsusta:v:13:y:2021:i:13:p:7115-:d:581721
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    References listed on IDEAS

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    Cited by:

    1. Mostafa Kazemi & Mohammad Daneshfar & Yousef Zandi & Alireza Sadighi Agdas & Negin Yousefieh & Leili Mohammadifar & Aida Rahmani & Mohammad Saberian & Amr Mamdouh & Mohamed Amine Khadimallah & Jie Li, 2022. "Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams," Sustainability, MDPI, vol. 14(7), pages 1-28, March.

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