Excerpt from Silica Refractories: Factors Affecting Their Quality and Methods of Testing the Raw Materials and Finished WareThe same problem has been attacked by determining the specific gravity 5 of the material before and after repeated heatings to cone I 5 - 16 (14 50° C approximately). The author designates (a) as good material, (b) as fair, and (c) as poor, and presents the following figures in Table I.About the PublisherForgotten Books p...
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