Sustainable magnesium phosphate micromortars formulated with PAVAL® alumina by-product as micro-aggregate

نویسندگان

چکیده

Magnesium phosphate cement (MPC) is an attractive alternative to Portland (PC) since it can also be obtained using by-products and wastes as raw materials. This research uses low-grade MgO (LG-MgO) a magnesium source obtain MPC, reducing CO2 emissions related MPC production. The binder referred “sustainable MPC” (sust-MPC). Moreover, this investigation incorporates by-product in the aluminium recycling process, named PAVAL® (PV). addition of PV (5, 17.5, 35 wt.%) water solid (W/S) ratio (0.23, 0.25, 0.28, 0.31) were studied terms mechanical fresh properties, leaching behaviour, microstructure evaluate degree inclusion K-struvite matrix. into sust-MPC improves behaviour micromortars, indicating good PV. formulations, BSEM-EDS analysis revealed potential chemical interaction between Al 17.5 wt.% with W/S 0.25 showed best performance (∼40 MPa compressive strength at 28 days curing). amount should lower than classify non-hazardous material end-of-life. El cemento de fosfato magnesio puede obtenerse empleando residuos y subproductos como materias primas, siendo una alternativa atractiva al (PC). Este estudio desarrolla un (MPC), mediante subproducto (LG-MgO), que permite reducir las emisiones llamarlo «MPC sostenible» Además, incorporamos obtenido del proceso reciclaje aluminio, Para evaluar el grado inclusión en la matriz K-estruvita, se han estudiado propiedades estado fresco, mecánicas, potencial lixiviación, microestructura formulaciones con 17,5 35% masa) relación agua sólido (0,23, 0,25, 0,28 0,31). La adición mejora comportamiento mecánico los micromorteros sust-MPC, indicando buena análisis BSEM-EDS, fresco revela interacción entre K-estruvita. 17,5% 0,25 presentó mejores mecánicas resistencia compresión días curado). clasificarlo no peligroso final su vida útil, debe ser menor 17,5%.

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ژورنال

عنوان ژورنال: Boletin De La Sociedad Espanola De Ceramica Y Vidrio

سال: 2023

ISSN: ['0366-3175', '2173-0431']

DOI: https://doi.org/10.1016/j.bsecv.2023.02.001