20.500.12556/DiRROS-17907 Use of steel slag for the synthesis of belite-sulfoaluminate clinker 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 belite-sulfoaluminate cement cement clinker steel slags clinker microstructure cement reactivity belitno sulfoaluminatni cement cementni klinker jeklarske žlindre mikrostruktura klinkerja reaktivnost cementa true false true Slovenian National Building and Civil Engineering Institute (ZAG) Angleški jezik Slovenski jezik © 2020 Slovenian National Building and Civil Engineering Institute Neznano 2024-01-19 14:14:18 2024-01-19 14:18:42 2024-01-20 03:46:22 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 11. 3. 2021; Str. 352-359 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-01-01 620.1/.2 54699523 44042499 coms2020-21-proceedings.pdf coms2020-21-proceedings.pdf Odprti dostop 1 F26B238E8BF0778AB8D98A949CB2541F d1e429b2a37026675b046e040be359e7d9a62d41e0ad3f635d5c3cbb247a0c46 a828bf42-b6cc-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24282 RAZ_Zibret_Lea_2020.pdf RAZ_Zibret_Lea_2020.pdf 1 3C4BC280B88A9A72D9E8D6927AA9782F 3a9741c2d204d1dd7bf8118ab569d8df874c83d2fb2f5f8fe874a4ca2aad4251 3c87266e-b6cd-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24283 Zavod za gradbeništvo Slovenije 0 0 0