Preparation and Properties of Geopolymer Matrix Composites Containing Waste Olivine Sands from a Metallurgical Process

Several geopolymer-based materials were produced and characterized by mixing metakaolin, a commercial sodium silicate solution, a sodium hydroxide solution, and a loose waste olivine sand deriving from a metallurgical process devoted to the production of a high manganese steel. Olivine sand was adde...

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Bibliographic Details
Published in:Journal of sustainable metallurgy 2022-09, Vol.8 (3), p.1154-1166
Main Authors: Furlani, E., Rondinella, A., Aneggi, E., Maschio, S.
Format: Article
Language:English
Subjects:
Composition
Compressive strength
Earth and Environmental Science
Environment
Fourier transforms
Geopolymers
Heat treatment
Infrared radiation
Manganese steel
Manganese steels
Metakaolin
Metallic Materials
Metallurgy
Olivine
Polymer matrix composites
Research Article
Sand
Sodium hydroxide
Sodium silicates
Sustainable Development
Water absorption
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Summary:Several geopolymer-based materials were produced and characterized by mixing metakaolin, a commercial sodium silicate solution, a sodium hydroxide solution, and a loose waste olivine sand deriving from a metallurgical process devoted to the production of a high manganese steel. Olivine sand was added either in the as-received form or after a thermal treatment at 900 °C. Hardened materials containing different amounts of olivine sand were characterized and their behavior was compared to that of a blank geopolymeric matrix. Materials were examined by X-ray diffraction, Fourier Transform Infrared Radiation, and optical and scanning electron microscope investigation; mechanical compressive strength was discussed taking into account water absorption and microstructure. It has been observed that all compositions containing the as-received olivine sands badly perform, whereas those prepared using thermally treated olivine have higher compressive strength than the reference blank composition. In particular, samples with composition containing 100 g of metakaolin and 75 g of olivine displayed the best overall behavior. Graphical Abstract
ISSN:2199-3823
2199-3831
DOI:10.1007/s40831-022-00557-1