Transactions of the INDIAN CERAMIC SOCIETY Vol. 43 1984
Low Cost Cold Face Insulation Bricks
from Common Clay
D. BANERJEE, N. C. BISWAS AND P. S. AGGARWAL
Pages : 170-171
DOI : 10.1080/0371750X.1984.10822713
Abstract
Attempts have been made in this work to develop low cost cold face
insulation bricks from common clay, which could be manufactured in
the rural sector. Different combustible materials were used for
increasing the porosity of the bricks.
Firing was done at 900°, 1000°, 1050° and 1100°C. Thermal conductivity
values varied between 1.8 and 7.2 gm cal/secfcm•;oc.cm
x tO- which is similar to that of conventional insulation bricks.
Bulk density varied from 0.55 to 0.85 gm.cm-•, while apparent
porosity varied between 60 and 78 %. Cold crushing strength was
between 4 and 11 kg.cm-•. Permanent change after reheating for
24 hrs was almost nil. Three compositions :satisfied the IS specification
2042 (1972) type 3 of low temperature insulation bricks to
be used at a maximum hot face temperature of 850°C. These bricks
can be used as back up insulation in industrial ceramic kilns and
furnaces. This type of raw mix-insulation can
