Refractory foam concrete has been developed in terms of its composition for long-term use at high temperatures in the nuclear power industry. Foam concrete based on Portland cement has an average density class of D700 and a maximum permissible application temperature class of I5 (500°C). Refractory foam concrete has improved deformation characteristics in terms of its axial tension and tensile strength in bending. This study investigated the strength variations of refractory foam concrete samples as a function of the heating temperature up to 400°C and prolonged exposure (up to 2000 h) at 200 and 400°C. A thermodynamic calculation was performed with the possible formation of low-base hydrosilicates (gyrolite and afwillite) up to 400°C, which was confirmed by the results of studies on the phase composition of the refractory foam concrete samples.
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Translated from Novye Ogneupory, No. 1, pp. 38 – 45, January, 2023
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Sycheva, A.M., Ruabova, S.S., Pirogov, S.Y. et al. Refractory Foam Concrete for Nuclear Power Engineering. Refract Ind Ceram 64, 38–45 (2023). https://doi.org/10.1007/s11148-023-00801-5
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DOI: https://doi.org/10.1007/s11148-023-00801-5