Use of fly ash and phosphogypsum for the synthesis of belite-sulfoaluminate clinker
Author(s): |
S. Kramar
L. Žibret E. Fidanchevska V. Jovanov B. Angjusheva V. Ducman |
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Medium: | journal article |
Language(s): | Spanish |
Published in: | Materiales de Construccion, February 2019, n. 333, v. 69 |
Page(s): | 176 |
DOI: | 10.3989/mc.2019.11617 |
Abstract: |
Fly ash and phosphogypsum were used as Naturally Occurring Radioactive Materials (NORM) by-products for the synthesis of belite-sulfoaluminate clinkers. The influence of raw mixture composition and firing temperature was investigated. Clinkers and cements were examined by X-ray powder diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy. The compressive strength of the cements was determined after 28 days. Clinker phases identified included ye’elimite, ß-phase of belite, ternesite and gehlenite, while the main hydration product of the cement pastes was ettringite. The results showed that belite-sulfoaluminate cements can be fabricated with a compressive strength of 45.9 N/mm² by firing the raw mixture (70 wt.% marl, 10 wt.% bauxite and 20 wt.% phosphogypsum) at a temperature of 1320°C/1h. |
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data sheet - Reference-ID
10516862 - Published on:
10/12/2020 - Last updated on:
19/02/2021