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Use of rubber crumbs as drainage layer in green roofs as potential energy improvement material

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  • Pérez, Gabriel
  • Vila, Anna
  • Rincón, Lídia
  • Solé, Cristian
  • Cabeza, Luisa F.

Abstract

Today, green roofs are a building system which provides interesting benefits over traditional roof solutions. The most important advantages are the reduction of surface runoff in cities, improvement of the urban climate, biodiversity support, improvement of the durability of roofing materials, and, especially, energy savings. This paper has the aim of studying the performance of green roofs as a passive system for energy savings, within a wider objective of seeking constructive solutions suitable for sustainable and environmentally friendly architecture. This idea is tested at an experimental installation available at the University of Lleida, with several cubicles testing the energy performance of different construction solutions. This work raises the possibility of using recycled rubber from tires as a drainage layer in green roofs, substituting the porous stone materials currently used (such as expanded clay, expanded shale, pumice, and natural puzolana). This solution would reduce the consumption of these natural materials, which also require large amounts of energy in its transformation process to obtain their properties. Moreover it would provide a solution to the problem of waste rubber from the tires, known as rubber crumbs. Since the purpose of the drainage layer is the optimum balance between air and water in the green roof system, first the ability for draining of recycled rubber granules was studied and was compared with the offered by stone materials. The new solution using rubber crumbs is also studied to test if it would keep the same insulating properties that the green roof with stone materials presented in previous studies. Early results show that this extensive green roof system can be a good passive energy savings tool in Continental Mediterranean climate in summer, and that rubber crumbs can be an interesting substitute for stone materials used as drainage layer in this type of green roofs.

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  • Pérez, Gabriel & Vila, Anna & Rincón, Lídia & Solé, Cristian & Cabeza, Luisa F., 2012. "Use of rubber crumbs as drainage layer in green roofs as potential energy improvement material," Applied Energy, Elsevier, vol. 97(C), pages 347-354.
    • Handle: RePEc:eee:appene:v:97:y:2012:i:c:p:347-354
    DOI: 10.1016/j.apenergy.2011.11.051
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    References listed on IDEAS

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    1. Spala, A. & Bagiorgas, H.S. & Assimakopoulos, M.N. & Kalavrouziotis, J. & Matthopoulos, D. & Mihalakakou, G., 2008. "On the green roof system. Selection, state of the art and energy potential investigation of a system installed in an office building in Athens, Greece," Renewable Energy, Elsevier, vol. 33(1), pages 173-177.
    2. Santamouris, M. & Pavlou, C. & Doukas, P. & Mihalakakou, G. & Synnefa, A. & Hatzibiros, A. & Patargias, P., 2007. "Investigating and analysing the energy and environmental performance of an experimental green roof system installed in a nursery school building in Athens, Greece," Energy, Elsevier, vol. 32(9), pages 1781-1788.
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    Cited by:

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    2. Nan Jiang & Weina Zou & Yi Lu & Ziman Liao & Lianglong Wu, 2024. "Using Recycled Construction Waste Materials with Varying Components and Particle Sizes for Extensive Green Roof Substrates: Assessment of Its Effects on Vegetation Development," Sustainability, MDPI, vol. 16(1), pages 1-15, January.
    3. Cabeza, Luisa F. & Rincón, Lídia & Vilariño, Virginia & Pérez, Gabriel & Castell, Albert, 2014. "Life cycle assessment (LCA) and life cycle energy analysis (LCEA) of buildings and the building sector: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 394-416.
    4. Yangang Xing & Phil Jones & Iain Donnison, 2017. "Characterisation of Nature-Based Solutions for the Built Environment," Sustainability, MDPI, vol. 9(1), pages 1-20, January.
    5. Kim, Jimin & Hong, Taehoon & Jeong, Jaemin & Koo, Choongwan & Jeong, Kwangbok, 2016. "An optimization model for selecting the optimal green systems by considering the thermal comfort and energy consumption," Applied Energy, Elsevier, vol. 169(C), pages 682-695.
    6. Brunetti, Giuseppe & Porti, Michele & Piro, Patrizia, 2018. "Multi-level numerical and statistical analysis of the hygrothermal behavior of a non-vegetated green roof in a mediterranean climate," Applied Energy, Elsevier, vol. 221(C), pages 204-219.
    7. Ricciardi, P. & Belloni, E. & Cotana, F., 2014. "Innovative panels with recycled materials: Thermal and acoustic performance and Life Cycle Assessment," Applied Energy, Elsevier, vol. 134(C), pages 150-162.
    8. Stefano Cascone, 2019. "Green Roof Design: State of the Art on Technology and Materials," Sustainability, MDPI, vol. 11(11), pages 1-27, May.
    9. Berardi, Umberto & GhaffarianHoseini, AmirHosein & GhaffarianHoseini, Ali, 2014. "State-of-the-art analysis of the environmental benefits of green roofs," Applied Energy, Elsevier, vol. 115(C), pages 411-428.
    10. Coma, Julià & Pérez, Gabriel & Solé, Cristian & Castell, Albert & Cabeza, Luisa F., 2016. "Thermal assessment of extensive green roofs as passive tool for energy savings in buildings," Renewable Energy, Elsevier, vol. 85(C), pages 1106-1115.
    11. Ana Isabel Abellán García & Noelia Cruz Pérez & Juan C. Santamarta, 2021. "Sustainable Urban Drainage Systems in Spain: Analysis of the Research on SUDS Based on Climatology," Sustainability, MDPI, vol. 13(13), pages 1-25, June.

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