Abstract
Results are provided for a study of refractory concrete before and after service in a cementation furnace with the aim of revealing reasons for rapid wear of a concrete block after four months of operation at 850 – 930°C in an endogas atmosphere. It is established that the reason for the rapid loss of concrete strength is destruction of the concrete matrix as a result of the chemical action of endogas. Destruction of the concrete matrix is connected with partial reduction of SiO2 to volatile SiO in microsilica and in calcium aluminosilicates.
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