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898660.pdf (5.85 MB)

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2025-08-22

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cc-by (c) Giro-Paloma, J. et al., 2025
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/223172

Development of Alternative Porous Magnesium Potassium Phosphate Cements as Thermal Insulating Materials

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https://doi.org/https://doi.org/10.3390/ma18173946

Resum

Magnesium potassium phosphate cement (MKPC), a type of chemically bonded phosphate ceramic (CBPC), presents a promising alternative to ordinary Portland cement (OPC). This study focuses on developing sustainable MKPC (sust-MKPC) as a thermally passive material for building applications. A low-grade magnesium oxide (LG-MgO) industrial by-product was utilized to formulate sust-MKPC, with hydrogen peroxide employed as an air-entraining agent (AEA) to induce high porosity and enhance thermal insulation while supporting sustainability goals by reducing energy consumption in climate control systems. Seven formulations incorporating varying hydrogen peroxide contents (0, 1, 2, 3, 5, 7.5, and 10 wt.%) were prepared to evaluate the impact of AEA on the thermal and physicomechanical properties. Comprehensive characterization, including porosity and thermal conductivity measurements, revealed that increasing the AEA content significantly improved thermal inertia and lowered thermal conductivity due to porosity. However, this enhancement was accompanied by a marked reduction in mechanical strength and density, highlighting the trade-off between thermal performance and structural integrity in porous sust-MKPC formulations.

Matèries

Porositat, Ciment pòrtland, Aigua oxigenada

Matèries (anglès)

Porosity, Portland cement, Hydrogen peroxide

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Articles publicats en revistes (Ciència dels Materials i Química Física)

Citació

GIRÓ PALOMA, Jessica, MAÑOSA BOVER, Jofre, MALDONADO-ALAMEDA, Alex, ALFOCEA ROIG, Anna, HUETE-HERNÁNDEZ, Sergio, CHIMENOS RIBERA, Josep ma., FORMOSA MITJANS, Joan. Development of Alternative Porous Magnesium Potassium Phosphate Cements as Thermal Insulating Materials. _Materials_. 2025. [consulta: 6 de gener de 2026]. ISSN: 1996-1944. [Disponible a: https://hdl.handle.net/2445/223172]

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