| Title: | Use of steel slag for the synthesis of belite-sulfoaluminate clinker |
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| 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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| Files: |  PDF - Presentation file, download (18,89 MB)
MD5: F26B238E8BF0778AB8D98A949CB2541F
Description: Odprti dostop
PDF - Presentation file, download (3,82 MB)
MD5: 3C4BC280B88A9A72D9E8D6927AA9782F
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| Language: | English |
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| Typology: | 1.08 - Published Scientific Conference Contribution |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| 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 |
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| Keywords: | belite-sulfoaluminate cement, cement clinker, steel slags, clinker microstructure, cement reactivity |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2020 |
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| Publisher: | Slovenian National Building and Civil Engineering Institute (ZAG) |
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| Year of publishing: | 2020 |
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| Number of pages: | Str. 352-359 |
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| PID: | 20.500.12556/DiRROS-17907  |
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| UDC: | 620.1/.2 |
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| COBISS.SI-ID: | 54699523 |
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| Copyright: | © 2020 Slovenian National Building and Civil Engineering Institute |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 11. 3. 2021;
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| Publication date in DiRROS: | 19.01.2024 |
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| Views: | 731 |
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| Downloads: | 302 |
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