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Title:Use of steel slag for the synthesis of belite-sulfoaluminate clinker
Authors:ID Žibret, Lea (Author)
ID Cvetković, Martina (Author)
ID Mrak, Maruša (Author)
ID Loncnar, Mojca (Author)
ID Ipavec, Andrej (Author)
ID Dolenec, Sabina (Author)
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Language:English
Typology:1.08 - Published Scientific Conference Contribution
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:Belite-sulfoaluminate (BCSA) cements are low-carbon mineral binders, which require low energy consumption and allow the incorporation of various secondary raw materials in the clinker raw meal. In this study two types of unprocessed steel slags, coming from stainless steel production, were incorporated in the BCSA clinkers. The clinker phase composition, clinker reactivity, and the compressive strength of the cement were studied to evaluate the possible use of the slag in BCSA clinkers. The cement clinkers were synthesized by using natural raw materials, white titanogypsum, mill scale, as well as two different steel slags: (i) EAF S slag, which is a by-product of melting the recycled steel scrap in an electric arc furnace, and (ii) la dle slag as a by-product of the processes of secondary metallurgy, in various quantities. Raw mixtures with two different targeted phase compositions varying in belite, calcium sulfoaluminate and ferrite phases were sintered at 1250 °C. Clinker phases were determined by Rietveld quantitative phase analysis, while their distribution, morphology and incorporation of foreign ions in the phases were studied by SEM/EDS analysis. The clinker reactivity was determined by isothermal calorimetry. BCSA cements were prepared by adding titanogypsum. The compressive strength of the cement pastes was determined after 7 days of hydration. The presence of a predicted major clinker phases was confirmed by Rietveld analysis, however periclase was also detected. Microscopy revealed subhedral grains of belite and euhedral grains of calcium sulfoaluminate phases, while ferrite occurred as an interstitial phase. The results showed differences in the microstructure and reactivity of the clinker and cement, which can be attributed to varying amounts of ettringite due to different slag types
Keywords:belite-sulfoaluminate cement, cement clinker, steel slags, clinker microstructure, cement reactivity
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2020
Publisher:Slovenian National Building and Civil Engineering Institute (ZAG)
Year of publishing:2020
Number of pages:Str. 352-359
PID:20.500.12556/DiRROS-17907 New window
UDC:620.1/.2
COBISS.SI-ID:54699523 New window
Copyright:© 2020 Slovenian National Building and Civil Engineering Institute
Note:Nasl. z nasl. zaslona; Opis vira z dne 11. 3. 2021;
Publication date in DiRROS:19.01.2024
Views:960
Downloads:359
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:
ŽIBRET, Lea, CVETKOVIĆ, Martina, MRAK, Maruša, LONCNAR, Mojca, IPAVEC, Andrej and DOLENEC, Sabina, 2020, Use of steel slag for the synthesis of belite-sulfoaluminate clinker. In : Construction materials for a sustainable future [online]. Published Scientific Conference Contribution. Ljubljana : Slovenian National Building and Civil Engineering Institute (ZAG). 2020. p. 352–359. [Accessed 17 March 2025]. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=17907
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Record is a part of a monograph

Title:Construction materials for a sustainable future : proceedings of the 2nd International Conference CoMS 2020/21
Editors:Aljoša Šajna, Andraž Legat, Sabina Jordan, Petra Horvat, Ema Kemperle, Sabina Dolenec, Metka Ljubešek, Matej Michelizza
Place of publishing:Ljubljana
Publisher:Slovenian National Building and Civil Engineering Institute (ZAG)
Year of publishing:2020
ISBN:978-961-94071-8-9
COBISS.SI-ID:44042499 New window

Document is financed by a project

Funder:Other - Other funder or multiple funders
Project number:C3330-17-529035
Name:Raziskovalci-2.0-ZAG-529035

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

Language:Slovenian
Keywords:belitno sulfoaluminatni cement, cementni klinker, jeklarske žlindre, mikrostruktura klinkerja, reaktivnost cementa


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