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EFFECT OF REPEATED WETTING AND DRYING ON PHYSICAL PROPERTIES OF A CLAY BODY *
Author(s) -
Morgan W. R.
Publication year - 1941
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.1151-2916.1941.tb14826.x
Subject(s) - vitrification , wetting , materials science , moisture , composite material , young's modulus , relative humidity , modulus , humidity , water content , geotechnical engineering , geology , medicine , physics , andrology , thermodynamics
A bstract Specimens of fine‐grained, red‐firing clay, which had been fired to temperatures corresponding to various stages of vitrification, were subjected to 200 cycles each of wetting at 100°F. and drying at 100°F. and 60% of relative humidity. This treatment, simulating weathering in mild climates, caused (1) a permanent gain in weight which was greater for the softer specimens; (2) a moisture expansion for the softer specimens but none for those near vitrification; (3) a fairly uniform decrease in modulus of elasticity for all specimens; and (4) a decrease in modulus of rupture for the softer specimens but an increase in strength for those that were completely vitrified. The data indicate that moisture expansion and a decrease in strength of soft‐fired clay bodies, caused by repeated wetting and drying, may be eliminated by proper vitrification.