Lea Žibret (Author), Katarina Šter (Author), Maruša Borštnar (Author), Mojca Loncnar (Author), Sabina Kramar (Author)

Abstract

The potential use of steel slag from treated steel slag in belite-sulfoaluminate cements wasinvestigated in this study. Cement clinkers with two phase compositions were synthesized, allowingthe incorporation of different amounts of steel slag. The phase composition and microstructure ofcement clinkers at three different sintering temperatures were studied by X-ray powder diffractionand the Rietveld method, as well as scanning electron microscopy with energy dispersive spectrome-try. The results showed that the targeted phase composition of clinkers was achieved at a sinteringtemperature of 1250%C. However, a higher amount of perovskite instead of ferrite was detectedin the clinker with a higher content of Ti-bearing bauxite. Apart from the main phases, such asbelite, calcium sulfoaluminate, and ferrite, several minor phases were identified, including mayenite,perovskite, periclase, and alkali sulfates. In both clinker mixtures, a higher content of MgO in the steelslags resulted in the formation of periclase. Furthermore, the hydration kinetics and compressivestrength at 7 and 28 days were studied in two cements prepared from clinkers sintered at 1250%C. Asevidenced by the results of isothermal calorimetry, the hydration kinetics were also influenced by theminor clinker phases. Cement with a higher content of calcium sulfoaluminate phase developed ahigher compressive strength

Keywords

cement;BCSA;jeklarska žlindra;sekundarne surovine;mikrostruktura;klinker;odprti dostop;cements;steel slag;secundary row materials;microstructure;clinker phase;open access;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: ZAG - Slovenian National Building and Civil Engineering Institute
Publisher: MDPI
UDC: 624
COBISS: 53480195 Link will open in a new window
ISSN: 2076-3417
Views: 6
Downloads: 1
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Other data

Secondary language: Slovenian
Secondary keywords: cement;BCSA;jeklarska žlindra;sekundarne surovine;mikrostruktura;klinker;
Source comment: Nasl. z nasl. zaslona; Opis vira z dne 2. 3. 2021;
Pages: str. 1-14
Volume: ǂVol. ǂ11
Issue: ǂiss. ǂ4
Chronology: 2021
ID: 19691653