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2023-04-20T12:10:18Z urn:hdl:10259/7652 Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars Salas García, Miguel Ángel Pérez Acebo, Heriberto Calderón Carpintero, Verónica Gonzalo Orden, Hernán Polyamide Waste material Waste polyamide Mortar Lightweight mortar Compressive strength Sustainable material Due to the considerable amount of waste plastics and polymers that are produced annually, the introduction of these waste products in construction materials is becoming a recurrent solution to recycle them. Among polymers, polyamide represents an important proportion of polymer waste. In this study, sustainable and lightweight mortars were designed and elaborated, substituting the aggregates by polyamide powder waste. Mortars were produced with various dosages of cement/aggregates, and the polyamide substitutions were 25, 50, 75, and 100% of the aggregates. The aim of this paper is to determine the density and the compressive strength of the manufactured mortars to observe the feasibility for being employed as masonry or rendering and plastering mortars. Results showed that with increasing polymer substitution, lower densities were achieved, ranging from 1850 to 790 kg/m3 in modified mortars. Mortars with densities below 1300 kg/m3 are cataloged as lightweight mortars. Furthermore, compressive strength also decreased with more polyamide substitution. Obtained values in recycled mortars were between 15.77 and 2.10 MPa, but the majority of the values (eight out of 12) were over 5 MPa. Additionally, an economic evaluation was performed, and it was observed that the use of waste polyamide implies an important cost reduction, apart from the advantage of not having to manage this waste material. Consequently, not only the mechanical properties of the new recycled materials were verified as well as its economic viability. 2023-04-20T12:10:18Z 2023-04-20T12:10:18Z 2020-11 info:eu-repo/semantics/article http://hdl.handle.net/10259/7652 10.3390/polym12112657 2073-4360 eng Polymers. 2020, V. 12, n. 11, 2657 https://doi.org/10.3390/polym12112657 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional MDPI