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FORMING PRESSURE OF DRY‐PRESSED REFRACTORIES. PART I 1
Author(s) -
Birch Raymond E.
Publication year - 1930
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1930.tb17069.x
Subject(s) - brick , hydraulic press , materials science , compressibility , high pressure , composite material , bulk density , water content , metallurgy , geotechnical engineering , environmental science , mechanical engineering , geology , thermodynamics , engineering , physics , soil water , soil science
Making use of a hydraulic press which presses standard fire brick, eight commercial mixtures were investigated to determine the effect of varying the forming pressure. To obtain pressures higher than those used commercially it was necessary to reduce the moisture content. The bulk density of uifired brick is shown to have increased directly with the pressure, as did the transverse strength. These changes, however, are lessened at the higher pressures. By comparing the green bulk density of brick formed on commercial, mechanically actuated presses, with those pressed hydraulically at known pressures it is concluded that industrial forming presses are operated at comparatively low pressures. Fireclay bodies do not attain a state of maximum compressibility within the limits of the study but continue to contract with additional pressure.