Microstructural analysis of bio-based PCM-enhanced lime mortars: Durability and energy efficiency for sustainable buildings
The development of energy-efficient and sustainable building materials is crucial in reducing energy consumption and environmental impact in the construction sector. This study presents a novel approach by integrating a bio-based microencapsulated phase change material (PCM) into air lime-based mort...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Navarra |
| Repositorio: | Dadun. Depósito Académico Digital de la Universidad de Navarra |
| Idioma: | inglés |
| OAI Identifier: | oai:dadun.unav.edu:10171/116257 |
| Acceso en línea: | https://hdl.handle.net/10171/116257 |
| Access Level: | acceso abierto |
| Palabra clave: | Bio-based phase change materials Lime Microstructure Durability Cyclability Thermal efficiency |
| Sumario: | The development of energy-efficient and sustainable building materials is crucial in reducing energy consumption and environmental impact in the construction sector. This study presents a novel approach by integrating a bio-based microencapsulated phase change material (PCM) into air lime-based mortars, aiming to enhance thermal performance while ensuring durability and mechanical integrity. Unlike conventional PCM-enhanced mortars, this research emphasizes the use of renewable, biodegradable PCMs derived from agricultural sources, reducing reliance on fossil-based alternatives. The optimized formulations were designed to function as rendering mortars, balancing workability, adhesion, and durability for application in both modern and historic buildings. A thorough microstructural investigation through SEM and MIP revealed that controlled PCM dosages (5–10 %) preserved matrix cohesion, whereas higher PCM contents (20 %) led to increased porosity. Thermal performance assessments, including DSC and hotbox experiments, confirmed the effectiveness of the PCM-enhanced mortars in regulating temperature fluctuations and improving energy efficiency. Additionally, durability testing demonstrated the superior resistance of PCM-modified mortars to freeze-thaw cycles and salt crystallization, while cyclability analyses confirmed their long-term thermal stability over multiple phase transitions. These findings establish bio-based PCM-enhanced lime mortars as a resilient, eco-friendly solution for sustainable construction, contributing to climate-responsive design and energy-efficient buildings. |
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