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THE USE OF PLASTIC CLAY GROG IN PREVENTING SPALLING 1
Author(s) -
Howe Raymond M.,
Phelps Stewart M.
Publication year - 1921
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.1151-2916.1921.tb18120.x
Subject(s) - grog , spall , calcination , materials science , shrinkage , composite material , porosity , metallurgy , geotechnical engineering , geology , chemistry , biochemistry , catalysis
Effect of calcined clay grog on the properties of fire‐brick .—A medium dense‐burning clay was calcined at cone 8, then ground and mixed with plastic clay in various proportions up to 40 per cent. An air spalling test of the burned bricks showed that the grog increased the resistance to spalling about 5 per cent for each per cent of grog added. The results for other physical properties agreed with those found by previous observers; the bricks with grog were more porous and weaker mechanically but showed less drying and burning shrinkage.