The effect of fibres and carbonation conditions on the mechanical properties and microstructure of lime/flax composites
Fibre and textile-reinforced mortars are increasingly being used for a variety of building applications, including the strengthening of masonry structures. Lime mortars reinforced with sustainable fibres (such as vegetable or cellulosic fibres) may provide an interesting solution. In this paper, a m...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Consejo General de la Arquitectura Técnica de España (CGATE) |
| Repositorio: | RIARTE |
| OAI Identifier: | oai:www.riarte.es:20.500.12251/3424 |
| Acesso em linha: | http://hdl.handle.net/20.500.12251/3424 https://doi.org/10.1016/j.cemconcomp.2023.104981 |
| Access Level: | acceso abierto |
| Palavra-chave: | Dióxido de carbono Carbonatación Morteros - Construcción Fibra de refuerzo Restauración arquitectónica Resistencia mecánica Ensayos (propiedades o materiales) Fibra vegetal 3313.04 Material de Construcción 2304.11 Fibras Naturales 2211.02 Materiales Compuestos 3312.08 Propiedades de Los Materiales 3312.09 Resistencia de Materiales 3312.12 Ensayo de Materiales 3312.07 Caliza 3312.02 Aglomerantes |
| Resumo: | Fibre and textile-reinforced mortars are increasingly being used for a variety of building applications, including the strengthening of masonry structures. Lime mortars reinforced with sustainable fibres (such as vegetable or cellulosic fibres) may provide an interesting solution. In this paper, a mixture of commercial lime with 20% metakaolin addition was used to produce composites reinforced with non-woven flax fabrics that were cured at different moisture contents (from 0 to 100%) for 7 or 14 days in a CO2 incubator. The composites were characterised to determine their flexural behaviour, carbonation level and microstructure. According to the results, no differences exist in the flexural strength of the composites made in the moisture range of 33%–66%. At 7 days of curing, they attained Modulus of Rupture (MOR) values that exceeded 5.5. MPa. Moreover, it was observed that under high moisture conditions, the permeability of the fibres allows for CO2 access, despite the saturation of the pores of the matrix – allowing a reaction in the vicinity of the fibres –, while under dry conditions, the fibres moisture retention does not permit the carbonation of the matrix in their vicinity, even though complete carbonation takes place after 14 days. © 2023 The Authors |
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