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Thermal and fire behaviour of cement blocks with recycled roof wastes

Identifiers
URI: http://hdl.handle.net/20.500.12251/2718
View/Open: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118230954&doi=10.2495%2fMC210101&partnerID=40&md5=6082c7d474fb1c1ce3ef4d6e0207e726
ISBN: 17433533
DOI: 10.2495/MC210101
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Author
Arroyo Sanz, Raquel; Alameda Cuenca-Romero, Lourdes; Alonso Díez, Álvaro; González, Sara; Calderón Carpintero, Verónica; [et al.]
Date
2021-07
Subject/s

Comportamiento térmico

Protección contra el fuego -construcción-

Cemento

Morteros - Construcción

Reciclaje - Construcción

Tejados

Material sostenible

Ecomateriales

Aislamiento térmico

Material de construcción

Unesco Subject/s

2211.29 Propiedades Térmicas de Los Sólidos

3313.04 Material de Construcción

3312.02 Aglomerantes

3312.12 Ensayo de Materiales

3312.08 Propiedades de Los Materiales

3308.02 Residuos Industriales

Abstract

In accordance with the European politics of reducing the amount of plastics and polymers sited in landfills, 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. Mortars made with Portland cement, sand, water and grinded roof wastes from the automobile industry that replace in different amounts part or all of the aggregates are examined in this study. 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 changed 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 low density compared to conventional light mortars. In addition, these additives improve other properties including workability, compaction of the matrix, prevent the disintegration of the particles and help to improve the mechanical properties, ductility, thermal resistance and durability against fire to reinforce the materials. These eco-mortars have a lower thermal conductivity as more quantity of roof wastes are incorporated, which greatly favours the thermal insulation of the final envelope, as well as a good behaviour against temperature, measured in terms of thermogravimetry and non-combustibility test. With these results, we can consider the use of roof wastes 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. © 2021 WIT Press

In accordance with the European politics of reducing the amount of plastics and polymers sited in landfills, 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. Mortars made with Portland cement, sand, water and grinded roof wastes from the automobile industry that replace in different amounts part or all of the aggregates are examined in this study. 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 changed 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 low density compared to conventional light mortars. In addition, these additives improve other properties including workability, compaction of the matrix, prevent the disintegration of the particles and help to improve the mechanical properties, ductility, thermal resistance and durability against fire to reinforce the materials. These eco-mortars have a lower thermal conductivity as more quantity of roof wastes are incorporated, which greatly favours the thermal insulation of the final envelope, as well as a good behaviour against temperature, measured in terms of thermogravimetry and non-combustibility test. With these results, we can consider the use of roof wastes 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. © 2021 WIT Press

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