Download or read book Porosity and Volume Changes of Clay Fire Bricks at Furnace Temperatures (Classic Reprint) written by George A. Loomis and published by Forgotten Books. This book was released on 2018-08-29 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Porosity and Volume Changes of Clay Fire Bricks at Furnace Temperatures The chemical analysis has been used to quite an extent in the study of the fundamental properties of fire bricks and is of con siderable value, not only in this regard but also in explaining the causes of failure in use. The chemical analysis serves as an indi cation of refractoriness by showing the degree of purity of the clay. Clay of the purest type possible - that is, pure kaolin has a softening temperature, or so-called melting point, of I 740° C. This purest form of clay has a composition corresponding to that of the mineral kaolinite, being composed of 46. 3 per cent silica, per cent alumina, and per cent chemically combined water. In burning, this chemical water is driven off and the com position becomes per cent silica and per cent alumina. Clay of this composition is of comparatively rare occurence, owing to the presence in most cases of quartz, feldspar, magnesia, lime, and iron oxide, in varying amounts, and these behave as fluxes in lowering the softening point of the Clay to a greater or less extent. Some attempts have been made to apply the chemi cal analysis directly as a measure of refractoriness by means of formulas, but these have not been. In any degree satisfactory. The determination of the amount of these fluxes by a chemical analysis, may, however, be considered as an aid in determining the refractoriness of the clay, as well as serving in some measure to explain the failures of clay fire bricks in use. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.