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Refractory Castables: Preparation and Some Properties
Author(s) -
HEINDL R. A.,
POST Z. A.
Publication year - 1950
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.1151-2916.1950.tb14912.x
Subject(s) - grog , materials science , cement , sieve (category theory) , curing (chemistry) , composite material , calcination , brick , metallurgy , mineralogy , geology , chemistry , mathematics , biochemistry , combinatorics , catalysis
Refractory castables in this investigation contained (a) aggregate made from unused high‐duty fire‐clay brick or calcined Kentucky flint clay and ( b ) domestic or imported high‐alumina hydraulic cement. The bulk densities were determined for different mixtures of grog passing through ( a ) a 3 /8 in. sieve and retained on a No. 10 sieve, ( b ) a No. 10 on a No. 40, and (c) a No. 40 (including fines). The bulk densities of a large number of such mixtures were plotted on triaxial diagrams and contour lines were drawn. One each of the more dense combinations containing fire‐clay brick grog and calcined flint‐clay grog was selected for making tests of batches containing from 10 to 30% of hydraulic cement. The tests indicated the effect on strength of (1) the curing treatment to which the specimens had been subjected, (2) the length of time the mixed batches remained unmolded, and (3) the varying cement: water ratio. The pyrometric cone equivalents of batches containing from 5 to 30% of cement, in increments of 5%, were determined.