Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting
Abstract
:1. Introduction
1.1. Design Stage and Choice of Materials
1.2. Considerations at the Construction Stage
1.3. Considerations during Infrastructure Working
2. Proposal of Circular Economy-Based Engineering Linking Different Sectors
2.1. Water Treatment: Sewage Sludge
2.2. Lighting Infrastructures: Use of Sunlight in Road Tunnels
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- Structures to use sunlight by shifting the most consuming zone, like classical pergolas or structures [29,30,31], should be constructed with cement originating from the treatment of sewage sludge, as seen in the preceding section. This is possible because these structures do not have to support heavy loads; their mission is just the filtering of natural light.
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- The design and construction of these structures must always keep in mind their next lives. Hence, a modular design to enable their deconstruction, transport, and use, if the tunnel is ever remodeled, is appropriate.
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- The pavement, whose accurate reflectance decreases energy consumption, will be chosen from among those incorporating waste from other products [44], which will be considered as a technological nutrient. Once more, sewage sludge can be used as a component of the cement whenever their reflective properties are appropriate.
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- The vegetation chosen to forest the mountainside will be perennial and, in addition, species will be sought that are appropriate for clean combustion, should they need to be removed.
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- Other structures for the use of sunlight, like mirrors or light-pipes, will also be modular, so that they can be used in other buildings once their life period in the tunnel is over.
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- Devices with hazardous materials, like LED projectors, will also be modular, so that demounting at the end of their life easily allows the separation of reusable components from those needing other kinds of treatment.
3. Circular Economy as Driving Force for a Global Engineering
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Molina-Moreno, V.; Leyva-Díaz, J.C.; Sánchez-Molina, J.; Peña-García, A. Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting. Sustainability 2017, 9, 2229. https://doi.org/10.3390/su9122229
Molina-Moreno V, Leyva-Díaz JC, Sánchez-Molina J, Peña-García A. Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting. Sustainability. 2017; 9(12):2229. https://doi.org/10.3390/su9122229
Chicago/Turabian StyleMolina-Moreno, Valentín, Juan Carlos Leyva-Díaz, Jorge Sánchez-Molina, and Antonio Peña-García. 2017. "Proposal to Foster Sustainability through Circular Economy-Based Engineering: A Profitable Chain from Waste Management to Tunnel Lighting" Sustainability 9, no. 12: 2229. https://doi.org/10.3390/su9122229