Mussel shell mortars durability: Study of aggregate replacement limit
The knowledge acquired through previous experimental phases with coating mortars with mussel shell aggregates led to conclude that irregular, flaky and hydrophobic particles of the mussel shell and the organic matter content introduce entrapped air and entrained air in the mixes. This phenomenon cau...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo General de la Arquitectura Técnica de España (CGATE) |
| Repositorio: | RIARTE |
| OAI Identifier: | oai:www.riarte.es:20.500.12251/3763 |
| Acceso en línea: | http://hdl.handle.net/20.500.12251/3763 https://doi.org/10.1016/j.jobe.2023.108239 |
| Access Level: | acceso abierto |
| Palabra clave: | Durabilidad Permeabilidad al vapor de agua Revisión bibliográfica Mejillones -residuos- Material sostenible Material compuesto Ensayos (propiedades o materiales) Propiedades mecánicas 3105.02 Piscicultura 2211.02 Materiales Compuestos 3312.02 Aglomerantes 3312.08 Propiedades de Los Materiales 3312.12 Ensayo de Materiales 3312.09 Resistencia de Materiales 3308.02 Residuos Industriales 3308.07 Eliminación de Residuos |
| Sumario: | The knowledge acquired through previous experimental phases with coating mortars with mussel shell aggregates led to conclude that irregular, flaky and hydrophobic particles of the mussel shell and the organic matter content introduce entrapped air and entrained air in the mixes. This phenomenon causes different and opposite effects on the main properties of mortars, which are in some way positive and negative (for durability), consequently, their durability cannot be easily predicted. The present work pretends to analyse the results of different durability tests, such as water vapour permeability, adhesive strength, and weathering cycles to recommend the maximum percentage of mussel shell sand used in coating mortars that guarantee the required lifespan. After an in-depth literature review, it can be said that it is not easy to predict the durability of mortars using mussel shell aggregates. This question has been hardly analysed in the existing literature and the maximum substitution percentage of conventional aggregate that can be replaced is not clear. This work aims to answer this issue by analysing different properties: water vapour permeability, adhesive strength, and weathering cycles. Mussel shell content improves the water vapour permeability of both air lime and cement mortars but worsens the adhesive strength and weathering cycle behaviour. For most applications, 25 % of mussel shell aggregate can be employed, but for some applications, 50 % or even 75 % of mussel shell aggregate is feasible and will avoid the undesirable landfilling of this waste. |
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