2026-05-20T04:04:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/112052026-01-14T01:05:46Zcom_10259_11203com_10259_5086com_10259_2604col_10259_11204

Alonso Díez, Álvaro 640 600 0000-0002-9023-7401 Arroyo Sanz, Raquel 832 600 0000-0002-8415-1927 Serna Avendaño, Sara f6d63fd0-7bac-48a4-93a7-67fdcc4e7b0d 600 Nevshupa, Roman d0fd2556-ce98-4808-b215-e9c13ba48ef2 600 Calderón Carpintero, Verónica 89 600 0000-0001-6863-5473 2026-01-13T11:35:26Z 2026-01-13T11:35:26Z 2025-12 2214-5095 https://hdl.handle.net/10259/11205 10.1016/j.cscm.2025.e05292 To reduce the use of natural resources and promote a circular economy in the construction sector, this study investigates the valorization of polyurethane, polyester, and fiberglass-based roofing waste from the automotive industry as a partial replacement for natural fine aggregates in cement-based mortar paving blocks. Paving elements were manufactured with replacement levels of 20 %, 40 %, and 60 % by volume and tested for mechanical, physical, and durability properties in related standards. The results show that all mixtures met the minimum splitting tensile strength requirement of 3.60 MPa, with 40 % replacement achieving a peak improvement of 9.3 % compared to the reference. The density decreased by up to 300 kg/m³ , improving handling and reducing transportation impacts, whereas wear resistance, slip resistance, and fire resistance remained within permissible limits. Durability tests, including salt crystallization, freeze–thaw cycles, and outdoor exposure, confirmed the suitability of the materials for exterior paving applications. This research demonstrates that PU-based roofing waste can replace up to 60 % of natural fine aggregates in paving block production without compromising performance, offering a technically viable and environmentally beneficial alternative for sustainable urban infrastructure. The authors gratefully acknowledge the financial support of the BU070P20 Project funded by the Fondo Europeo de Desarrollo Regional (FEDER) and the Junta de Castilla y León (Spain). This work was also supported by the Regional Government of Castilla y León (Junta de Castilla y León), the Ministry of Science and Innovation MCINN, and the European Union NextGenerationEU/PRTR. application/pdf eng Elsevier Case Studies in Construction Materials. 2025, V. 23, p. e05292 https://doi.org/10.1016/j.cscm.2025.e05292 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Cobblestone Mortar Polyurethane waste Circular economy Durability Materiales de construcción Resistencia de materiales Ingeniería civil Building materials Strength of materials Civil engineering Sustainable paving solutions: Physical and outdoor behavior of cement cobblestones with industrial polymer roof waste aggregates info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Case Studies in Construction Materials 23 e05292 THUMBNAIL Alonso-csicm_2025.pdf.jpg Alonso-csicm_2025.pdf.jpg IM Thumbnail image/jpeg 4819 https://riubu.ubu.es/bitstream/10259/11205/4/Alonso-csicm_2025.pdf.jpg 7a0d25e771499dc1288737bbb6f4a6cc MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 1362 https://riubu.ubu.es/bitstream/10259/11205/3/license.txt 5d013bfa6e473ff0db22cd82a4d71a70 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/11205/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Alonso-csicm_2025.pdf Alonso-csicm_2025.pdf application/pdf 16548335 https://riubu.ubu.es/bitstream/10259/11205/1/Alonso-csicm_2025.pdf 35c02dcaec64a3a62f9f9451efcc6318 MD5 1 10259/11205 oai:riubu.ubu.es:10259/11205 2026-01-14 02:05:46.657 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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