Huete Hernández, SergioMaldonado Alameda, AlexAlfocea Roig, AnnaGiro Paloma, JessicaChimenos Ribera, Josep Ma.Formosa, Joan2023-04-122023-04-122023-02-200366-3175https://hdl.handle.net/2445/196611Magnesium phosphate cement (MPC) is an attractive alternative to Portland cement (PC) since it can also be obtained using by-products and wastes as raw materials. This research uses low-grade MgO (LG-MgO) as a magnesium source to obtain MPC, reducing CO2 emissions related to MPC production. The obtained binder can be referred to as 'sustainable MPC' (sust-MPC). Moreover, this investigation incorporates a by-product obtained in the aluminium recycling process, named PAVAL® (PV). The addition of PV (5, 17.5, and 35 wt.%) and water to solid (W/S) ratio (0.23, 0.25, 0.28, and 0.31) were studied in terms of mechanical and fresh properties, leaching behaviour, and microstructure to evaluate the degree of PV inclusion in the K-struvite matrix. The addition of PV into sust-MPC improves the mechanical behaviour of the micromortars, indicating a good inclusion of PV. The mechanical and fresh behaviour of the formulations, and BSEM-EDS analysis revealed the potential chemical interaction between Al and K-struvite matrix. The addition of 17.5 wt.% of PV with a W/S of 0.25 showed the best mechanical performance (∼40 MPa of compressive strength at 28 days of curing). The amount of PV should be lower than 17.5 wt.% to classify it as non-hazardous material at the end-of-life.6 p.application/pdfengcc-by-nc-nd (c) Sociedad Española de Ceramica y Vidrio, 2023https://creativecommons.org/licenses/by-nc-nd/4.0/Propietats mecàniquesMicroestructuraMechanical propertiesMicrostructureinfo:eu-repo/semantics/article7321162023-04-12info:eu-repo/semantics/openAccess