Circular Building Process: Reuse of Insulators from Construction and Demolition Waste to Produce Lime Mortars

Abstract

This research aims to revalue the possibilities presented by lime mortars for use in renovation and as cladding material on facades. The study focuses on analyzing the technical feasibility of lime mortars with the incorporation of residues from three types of thermal insulation materials: expanded polystyrene with graphite especially suitable for use on facades; expanded polystyrene for use indoors; and insulating mineral wool. The incorporation of these construction and demolition residues makes it possible to improve several technical performance aspects of lime mortars, and to incorporate circular economy criteria in the manufacturing process of these materials. The results showed that the incorporation of mineral wool improves the mechanical resistance to the bending of mortars, increases their durability against freeze–thaw cycles and salt crystallization, and reduces the final shrinkage of mortars. For their part, mortars with the addition of polystyrene-insulating residues reduce mechanical resistance, but also reduce thermal conductivity, and are lighter, which is why they are shown as a possible alternative for use in precast.

Feasibility of Ecofriendly Mortars with Different Hemp Additions for Use in Building Sector

“…This is drinking water fit for human consumption and suitable for use in mortars and concretes [58], which has been successfully used in previous studies [59]. Among its main characteristics are its soft hardness (25 mg CaCO 3 /L) and neutral pH between 7 and 8 [60] recommended to avoid setting alterations.…”

Reutilización de residuos de construcción y demolición (RCD): una revisión de la literatura

“…Já Santos e Cabral (2020) considerou, em seus estudos, a substituição da areia natural por agregados produzidos através da reutilização de RCD, em proporções de 25% e 50%, encontrando resultados promissores quanto às características físicas e a resistência mecânica em traços de emboço e contrapiso. Ferrández et al (2022) propõem o uso de RCD para a produção de argamassas para uso em reformas e em revestimentos de fachada. Os autores encontraram resultados robustos quanto às propriedades físicas e mecânicas do material final obtido e concluem que a incorporação do RCD é viável tecnicamente e melhora o desempenho das argamassas de cal para as finalidades estudadas.…”

Recovery of Mineral Wool Waste and Recycled Aggregates for Use in the Manufacturing Processes of Masonry Mortars

“…Improving the dimensional stability of mortars by reducing shrinkage is shown as well [30]. In this way, through simulations using software such as STAR-CCM+©, Piña et al [32] demonstrated that the energy efficiency of buildings incorporating mortar coatings with mineral wool fiber additions can be improved. In addition, in previous studies, it has been observed that the incorporation of mineral wool residues in plaster mortars increases the mechanical strength of prefabricated slabs and panels [33].…”