Grog Fine Buff

Oxide	Analysis	Formula
BaO	0.20%	0.01
CaO	0.39%	0.05
K2O	2.35%	0.17
MgO	0.78%	0.13
Na2O	0.78%	0.09
TiO2	0.49%	0.04
Al2O3	14.79%	1.00
P2O5	0.04%	-
SiO2	77.68%	8.91
Fe2O3	2.46%	0.11
MnO	0.03%	-
LOI	0.01%	n/a
Oxide Weight		689.54
Formula Weight		689.61

Notes

Plainsman grog is made by grinding brick. Plainsman obtains reject brick supplies from a local structural brick manufacturer. The source buff brick material is made from fine stoneware type clays which are dry pan ground to 10 mesh and fired to high temperatures in the cone 8-10 range. The fired brick is then ground using a hammermill and sized to pass a vibratory 42 mesh screen. The grog has some iron specks which are a product of the natural iron stone concretions inherent in the parent material.

Data:

SEIVE ANALSIS

TOTAL PLUS_35 PLUS_48 PLUS_65 PLUS_100 PLUS_150 PLUS_200 PLUS_325
+-----+-------+-------+-------+--------+--------+--------+--------+
|100 | |0.2 |5.0 |19.0 |15.0 |17.5 |15.0 |
+-----+-------+-------+-------+--------+--------+--------+--------+

PCE: Approx cone 28
Analysis from Barringer Magenta 1982

Related Information

Links

Typecodes	Aggregate Granular materials intended to impart raw and fired structural strength or thermal expansion properties to bodies or deliver special speckling effects in glazes.

By Tony Hansen
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