LOW-CEMENT DOSAGE REFRACTORY CONCRETE WITH LOW THERMAL CONDUCTIVITY

Super-aluminous refractory concrete (over 94 % AI2O3) with low dosage of cement (9 %) was made, its physical, thermal, and mechanical characteristics being considered suitable for the intermediate layer of a steel casting ladle: porosity of 29.31 %, the apparent density of 2.32 g·cm-3 thermal conduc...

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Veröffentlicht in:Journal of engineering studies and research 2022-10, Vol.28 (4), p.98-106
Hauptverfasser: Paunescu, Lucian, Volceanov, Eniko, Paunescu, Bogdan-Valentin, Surugiu, Ioana Monica
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Sprache:eng
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Zusammenfassung:Super-aluminous refractory concrete (over 94 % AI2O3) with low dosage of cement (9 %) was made, its physical, thermal, and mechanical characteristics being considered suitable for the intermediate layer of a steel casting ladle: porosity of 29.31 %, the apparent density of 2.32 g·cm-3 thermal conductivity of 1.45 W·m-1·K-1, and compressive strength of 34.8 MPa (after heat treatment at 1500 °C). The aim of the research was achieving a super-aluminous concrete with low-cement dosage, which would have acceptable thermal insulation properties, so that the heat loss through this refractory lining layer would be significantly reduced compared to the reference situation.
ISSN:2068-7559
2344-4932
DOI:10.29081/iesr.v28i4.011