2026-07-18T06:23:05Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/74402023-03-28T12:47:59Zcom_10259_6251com_10259_5086com_10259_2604col_10259_6252

2023-02-10T09:24:48Z urn:hdl:10259/7440 Characterization properties and fire behaviour of cement blocks with recycled polyurethane roof wastes Alameda Cuenca-Romero, Lourdes Arroyo Sanz, Raquel Alonso Díez, Álvaro Gutiérrez González, Sara Calderón Carpintero, Verónica Ecoblocks Lightweight mortar Fire resistance Polyurethane Confocal microscopy In accordance with the European politics of reducing the amount of polymers and plastics wastes, the inclusion of compounds such as roof wastes as recycled and reusable materials to replace variable amounts of aggregates is interesting in the production of new construction materials due to their physical and chemical behaviour. Prefabricated mortar blocks have made with Portland cement, sand, water and grinded roof polyurethane based wastes from the automobile industry that replace in different amounts part or all of the aggregates. To try to avoid the mechanical resistance limitation due to the use of roof wastes, the chemical properties of the binders have been modified with non-ionic surfactants that improve the effect on the hydration of the clinker. This variation produces an important change in the mechanical resistance to achieve recycled structural materials with a density between 18.7% and 62.7% lower compared to conventional lightweight mortars. In addition, these surfactants improve other properties including workability, compaction of the matrix, prevent the disintegration of the particles and help to improve the mechanical properties and durability against fire to reinforce the materials. These eco-mortars have a good behaviour against temperature of the final envelope, measured in terms of non-combustibility test. With these results, the use of roof wastes can be consider as a sustainable alternative to the materials currently used and then with them we can be able to contribute to a more ecological business model in the building sector. 2023-02-10T09:24:48Z 2023-02-10T09:24:48Z 2022-06 info:eu-repo/semantics/article 2352-7102 http://hdl.handle.net/10259/7440 10.1016/j.jobe.2022.104075 eng Journal of Building Engineering. 2022, V. 50, 104075 https://doi.org/10.1016/j.jobe.2022.104075 info:eu-repo/grantAgreement/Junta de Castilla y León//BU070P20//Prefabricados de mortero eco-eficientes aligerados con residuos poliméricos industriales con propiedades estructurales y térmicas mejoradas/ http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier