Alkali activated materials based on glass waste and slag for thermal and acoustic insulation

S. Stoleriu; I. N. Vlasceanu; C. Dima; A. I. Badanoiu; G. Voicu

doi:10.3989/mc.2019.08518

Autores/as

S. Stoleriu Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politechnica of Bucharest https://orcid.org/0000-0003-3553-2034
I. N. Vlasceanu Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politechnica of Bucharest https://orcid.org/0000-0001-8611-2027
C. Dima Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politechnica of Bucharest https://orcid.org/0000-0003-1295-5034
A. I. Badanoiu Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politechnica of Bucharest https://orcid.org/0000-0002-9091-3692
G. Voicu Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politechnica of Bucharest https://orcid.org/0000-0001-7155-7138

DOI:

https://doi.org/10.3989/mc.2019.08518

Palabras clave:

Materiales activados alcalinamente, Espuma, Residuos de vidrio, Aislamientos térmicos y acústicos

Resumen

Los materiales activados alcalinamente porosos (AAM) se pueden obtener a base de polvo de residuos de vidrio y mezclas de escoria mediante activación alcalina con una solución de hidróxido de sodio (NaOH). Para obtener una microestructura porosa adecuada, las pastas de AAM endurecidas se trataron térmicamente a temperaturas que oscilan entre 900°C y 1000°C durante 60 o 30 minutos. Debido al comportamiento intumescente específico de este tipo de material, se produce un aumento significativo en el volumen y la porosidad durante el tratamiento térmico. La sustitución parcial del polvo de residuos de vidrio por escoria conlleva un aumento en las resistencias a compresión previamente evaluadas (hasta 37 MPa) y después (aproximadamente 10 MPa) del tratamiento térmico; el aumento de la dosis de escoria también determina el aumento de la temperatura de activación del proceso intumescente (por encima de 950°C). La alta porosidad y la microestructura específica de estos materiales recomiendan que se utilicen como materiales de aislamiento térmico y acústico.

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