{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T22:54:00Z","timestamp":1776466440168,"version":"3.51.2"},"reference-count":180,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,4,22]],"date-time":"2022-04-22T00:00:00Z","timestamp":1650585600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Environment, Climate Change and Low Carbon Economy Programme - Environment Programme","award":["CirMat project - CIRcular aggregates for sustainable road and building MATerials"],"award-info":[{"award-number":["CirMat project - CIRcular aggregates for sustainable road and building MATerials"]}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["2021.06428.BD"],"award-info":[{"award-number":["2021.06428.BD"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["2021.08004.BD"],"award-info":[{"award-number":["2021.08004.BD"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sustainability"],"abstract":"<jats:p>Various researchers are developing efforts to integrate waste and by-products as alternative materials in road construction and maintenance, reducing environmental impacts and promoting a circular economy. Among the alternative materials that several authors have studied regarding their use as partial or total substitutes for natural aggregates in the asphalt paving industry, the steel slag aggregate (SSA) and recycled concrete aggregate (RCA) from construction demolition waste (CDW) stand out. This paper reviews and discusses the characteristics and performance of these materials when used as aggregates in asphalt mixtures. Based on the various studies analyzed, it was possible to conclude that incorporating SSA or RCA in asphalt mixtures for road pavements has functional, mechanical, and environmental advantages. However, it is essential to consider some possible drawbacks of these aggregates that are discussed in this paper, to define the acceptable uses of SSA and RCA as sustainable feedstocks for road paving works.<\/jats:p>","DOI":"10.3390\/su14095022","type":"journal-article","created":{"date-parts":[[2022,4,24]],"date-time":"2022-04-24T00:45:21Z","timestamp":1650761121000},"page":"5022","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":61,"title":["Steel Slag and Recycled Concrete Aggregates: Replacing Quarries to Supply Sustainable Materials for the Asphalt Paving Industry"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4677-4581","authenticated-orcid":false,"given":"Carlos D. A.","family":"Loureiro","sequence":"first","affiliation":[{"name":"ISISE\u2014Institute for Sustainability and Innovation in Structural Engineering, Department of Civil Engineering, University of Minho, 4800-058 Guimaraes, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9210-8216","authenticated-orcid":false,"given":"Caroline F. N.","family":"Moura","sequence":"additional","affiliation":[{"name":"ISISE\u2014Institute for Sustainability and Innovation in Structural Engineering, Department of Civil Engineering, University of Minho, 4800-058 Guimaraes, Portugal"}]},{"given":"Mafalda","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"DST\u2014Domingos da Silva Teixeira, 4700-727 Braga, Portugal"}]},{"given":"Fernando C. G.","family":"Martinho","sequence":"additional","affiliation":[{"name":"CERENA\u2014Centro de Recursos Naturais e Ambiente, Instituto Superior T\u00e9cnico, Lisbon University, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4589-5250","authenticated-orcid":false,"given":"Hugo M. R. D.","family":"Silva","sequence":"additional","affiliation":[{"name":"ISISE\u2014Institute for Sustainability and Innovation in Structural Engineering, Department of Civil Engineering, University of Minho, 4800-058 Guimaraes, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8077-9792","authenticated-orcid":false,"given":"Joel R. M.","family":"Oliveira","sequence":"additional","affiliation":[{"name":"ISISE\u2014Institute for Sustainability and Innovation in Structural Engineering, Department of Civil Engineering, University of Minho, 4800-058 Guimaraes, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,22]]},"reference":[{"key":"ref_1","unstructured":"European Commission (2020). A New Circular Economy Action Plan for a Cleaner and More Competitive Europe, European Commission."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Moura, C., Nascimento, L., Loureiro, C., Rodrigues, M., Oliveira, J., and Silva, H. (2022). Viability of Using High Amounts of Steel Slag Aggregates to Improve the Circularity and Performance of Asphalt Mixtures. Appl. 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