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Lightweight structural eco-mortars made with polyurethane wastes and non-Ionic surfactants

Identifiers
URI: http://hdl.handle.net/20.500.12251/1506
ISSN: 9500618
DOI: 10.1016/j.conbuildmat.2018.11.214
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Author
Arroyo Sanz, Raquel; Horgnies, Matthieu; Junco Petrement, Carlos; Rodríguez Sáiz, Ángel; Calderón Carpintero, Verónica [et al.]
Date
2019
Subject/s

Reciclaje - Construcción

Morteros aligerados

Morteros - Construcción

Espuma de poliuretano

Propiedades mecánicas

Ensayos (propiedades o materiales)

Unesco Subject/s

3313.04 Material de Construcción

3312.08 Propiedades de Los Materiales

3312.12 Ensayo de Materiales

3312.02 Aglomerantes

Abstract

The properties of structural lightweight mortars obtained with recovered foam polyurethane wastes have been studied, containing a low fraction of soluble non-ionic surfactant. The characterisation of mechanical properties, bulk density, microstructure and porosity highlights two types of behaviour according to the composition (e.g. hydrolysis grade) of the non-ionic surfactants. By using additives with low hydrophilic–lipophilic balance (HLB) values, the lightweight mortars show more and more high mechanical properties according to the increase of the substitution rate of sand by PU wastes. These non-ionic surfactants seem to promote a homogeneous microstructure and improve the adhesion between PU wastes and cement paste. On the other hand, the mortars mixed with additives showing high HLB values, are more lightweight and macroporous, due to the increase of air entrained driven by the substitution rate of sand by PU wastes. © 2018 Elsevier Ltd

The properties of structural lightweight mortars obtained with recovered foam polyurethane wastes have been studied, containing a low fraction of soluble non-ionic surfactant. The characterisation of mechanical properties, bulk density, microstructure and porosity highlights two types of behaviour according to the composition (e.g. hydrolysis grade) of the non-ionic surfactants. By using additives with low hydrophilic–lipophilic balance (HLB) values, the lightweight mortars show more and more high mechanical properties according to the increase of the substitution rate of sand by PU wastes. These non-ionic surfactants seem to promote a homogeneous microstructure and improve the adhesion between PU wastes and cement paste. On the other hand, the mortars mixed with additives showing high HLB values, are more lightweight and macroporous, due to the increase of air entrained driven by the substitution rate of sand by PU wastes. © 2018 Elsevier Ltd

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