Effect of temperature on geopolymer and Portland cement composites modified with Micro-encapsulated Phase Change materials
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Pilehvar, Shima; García Sanfélix, Susana; Szczotok, Anna M.; Rodríguez, Juan Francisco; Valentini, Luca; [et al.]Área de conocimiento
Construcciones ArquitectónicasPatrocinadores
We gratefully acknowledge funding from the Research Council of Norway, project number 238198. The authors acknowledge Fundación Séneca Agencia de Ciencia y Tecnología de la Región de Murcia “Ayuda a las Unidades y Grupos de Excelencia Científica de la Región de Murcia (Programa Séneca 2014)” (Grant # 19877/GERM/14), for financial support.Fecha de publicación
2020-08Editorial
ElsevierCita bibliográfica
Shima Pilehvar, Susana G. Sanfelix, Anna M. Szczotok, Juan Francisco Rodríguez, Luca Valentini, Marcos Lanzón, Ramón Pamies, Anna-Lena Kjøniksen, Effect of temperature on geopolymer and Portland cement composites modified with Micro-encapsulated Phase Change materials, Construction and Building Materials, Volume 252, 2020, 119055, ISSN 0950-0618, https://doi.org/10.1016/j.conbuildmat.2020.119055.Revisión por pares
siPalabras clave
Micro-encapsulated Phase Change MaterialsPortland cement
Geopolymer
Microstructure
Compressive strength
Isothermal calorimetry
Resumen
To reduce pollution and global warming, the energy consumption needs to be decreased. Incorporation of Phase Change Materials (PCMs) into building materials can help lower the energy needed to cool and warm buildings, while keeping the indoor temperature at a comfortable level. However, incorporation of PCMs into construction materials alter their performance. In this study, the effect of temperature and addition of two different Micro-encapsulated Phase Change Materials (MPCM) to geopolymer concrete (GPC) and Portland cement concrete (PCC) and pastes was investigated. The samples were examined both below (20 °C) and above (40 °C) the melting points of the PCMs. While the MPCM is not damaged by the alkaline solution, a few microcapsules are broken during the mixing process. Isothermal calorimetry shows that MPCM addition slows down the reaction rate of both geopolymer and Portland cement paste. The setting times were faster when the temperature was increased. The mechanical properties ...
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