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- W4310551428 abstract "In this work, iron ore tailing (IOT) was used for the production of two different materials: sodium silicate and geopolymers. Initially, reactions of IOT with NaOH were carried out by hydrothermal reaction in autoclave at 200 °C (1:1.5 and 1:2.5 SiO2:NaOH molar ratio) and reaction times of 4 and 8 h. X-ray fluorescence by dispersive energy (XRF), X-ray diffraction (XRD), Mössbauer spectroscopy, scanning electron microscopy (SEM-EDS) and titrations showed that IOT:NaOH ratios of 1:2.5 and reaction time 8 h completely dissolved the quartz from the IOT, obtaining a solid fraction consisting mainly of hematite and an aqueous phase of sodium silicate, which showed contents of ca. 23% SiO2 and 19% Na2O. This sodium silicate obtained was then combined with IOT (25 and 50 wt.%) to produce geopolimeric material with excellent physicochemical properties, fast curing time and very good compressive strength results, which ranged from 41 to 58 MPa and many potential applications." @default.
- W4310551428 created "2022-12-12" @default.
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- W4310551428 date "2023-01-01" @default.
- W4310551428 modified "2023-10-14" @default.
- W4310551428 title "Use of Iron Ore Tailing as Raw Material for Two Products: Sodium Silicate and Geopolymers" @default.
- W4310551428 doi "https://doi.org/10.21577/0103-5053.20220149" @default.
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