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Circular Economy
a) Profiler b) Falling weight deflectometer Figure 2. Images of the FWD and Profiler a) and FWD b) in the Experimental Section
3. Results and conclusions
Low quality recycled mixed aggregates can be used as substitutes for natural aggregates as unbound layers. The mechanical performance and surface roughness values obtained from the experimental road shown an acceptable behaviour. Backcalculation and Forward calculation of moduli shown acceptable values for recycled granular layers. Moduli value for RMAS-1 averaged 349 MPa and MRS-1 averaged 158 MPa, these recycled materials can be used as unbound layers in low volume traffic roads. International Roughness Index (IRI) was similar in the three sections obtaining values under 3 m/km which according to World Bank it corresponds with a new pavement (Sayers, 1986).
4. Acknowledgment
The authors would like to thank the Civil Works Agency of the Regional Government of Andalusia (Agencia de la Obra Pública de la Junta de Andalucía), for its encouragement and support of this research study. We would also like to thank the construction companies Azvi and Geocisa, who made the lab tests, and the pavement survey company GYA.
5. References
Rodríguez, G., C. Medina, F.J. Alegre, E. Asensio, M.I. Sánchez de Rojas, Assessment of Construction and Demolition Waste plant management in Spain: in pursuit of sustainability and eco-efficiency, J. Clean. Prod. 90 (2015) 16–24. doi:10.1016/j.jclepro.2014.11.067.
European Union, Eurostat, Waste Stat. Eur. (2017).
Mudgal, S., M. Hestin, M. Trarieux, S. Mimid, Contacts BIO Intelligence Service Véronique Monier Service Contract on Management of Construction and Demolition Waste – SR1 European Commission (DG ENV) In association with, (2011).
Sayers, M.W., T.D. Gillespie, W.D.O. Paterson, Guidelines for conducting and calibrating road roughness measurements, World Bank, 1986.
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