Investigation of Testing Parameters Influencing the Permanent Linear Change Testing Results of Dense Refractory Bricks

J. R. Campello-García, D. Castaño-Laviana, M. Miranda-Martínez

ITMA Materials Technology, 33428 Llanera, Asturias/Spain


Volume 7, Issue 3, Pages 113 - 118


Current standards for the determination of physical and chemical properties of refractory materials disclose little or no data on precision values. But, such data are basic information for communication between refractory producer and final user. Sometimes differences between the values of properties reported by specialized testing laboratories and those provided by the refractory suppliers lead to discussions, or even claims. This paper reports some results on permanent linear change (PLC) testing of refractory materials, carried out according to EN 993-10. These data were obtained within the frame of the European funded research project known as ReStaR which included a multinational consortium of 13 partners including six independent laboratories. A factorial design of the experiments, followed by an ANOVA analysis, was carried out in order to identify the influencing factors. In the case of Permanent Linear Change (PLC) up to five influencing factors were investigated.


permanent linear change, testing standard, interlaboratory tests


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