Abstract
Refractory aggregates were synthesised from beneficiated fly ash by reaction sintering with calcined alumina at 1600°C, and 83% mullite yield was achieved. The aggregates had low porosity, low thermal expansion and good refractoriness. To study compatibility in castable refractories, the aggregates were used in high alumina cement based low cement castables and their thermomechanical behaviour was studied. Microstructural characterisation revealed that the emergence of new bond phases such as mullite and calcium hexa-aluminate had a beneficial effect on the hot modulus of rupture and creep resistance of castables. An attempt was made to establish a structure–property relationship.
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References
1.
KANZAKI
S.
,
TABATA
H.
,
KUMAZAWA
T.
and
OHTA
S.
J. Am. Ceram. Soc. , 1985 , 68 , C6—C7.
2.
TORRECILLAS
R.
,
FANTOZZI
G.
,
DE AZA
S.
and
MOYA
J. S.
Acta Mater. , 1997 , 45 , 897 –906 .
3.
LESSING
P. A.
,
GORDON
R. S.
and
MAZDIYASNI
K. S.
J. Am. Ceram. Soc. , 1975 , 58 , 149 .
4.
ISMAIL
M. G. M. U.
,
NAKAI
Z.
and
SOMIYA
S.
I Am. Ceram. Soc. , 1987 , 70 , C7—C8.
5.
ZAWRAH
M. F. M.
and
KHALIL
N. M.
Ceram. Int. , 2001 , 27 , 689 –694 .
6.
BOCH
P.
,
CHARTIER
T.
and
RODRIGO
P. D. D.
Ceram. Trans. , 1990 , 6 , 353 –374 .
7.
JOHNSON
S. M.
and
PASK
J. A.
Bull. Ant Ceram. Soc. , 1982 , 61 , 838 .
8.
WILSON
H. H.
: Bull. Ant Ceram. Soc. , 1969 , 48 , 796 –797 .
9.
GOSKI
D. G.
and
CALEY
W. F.
Ceram. Eng. Sct Proc. , 1996 , 17 , (3 ), 187 –194 .
10.
SEN
S. K.
and
AGARWAL
P. S.
Silic. Ind , 1997 , 62 , 39 .
11.
OHTAKE
T.
,
UCIDO
K.
,
IKAZAKI
F.
1991 , 99 , (3 ), 55 –59 .
12.
HWANG
J. Y.
,
HUANG
X.
and
HEIN
A. F.
JOM , 1994 , 46 , (5 ), 36 –39 .
13.
HUANG
X.
,
HWANG
J. Y.
and
MUTSUDDY
B. C.
interCeraPI , 1995 , 44 , (2 ), 65 –71 .
14.
MITRA
N. K.
,
PARYA
T. K.
,
BOSE
S.
,
MUKOPADHYAY
R.
and
BOSE
S.
Indian Refract. Makers Assoc. J. , 1999 , XXXII , (2 ), 20 –25 .
15.
KUMAR
S.
: PhD thesis , Calcutta University , India , 1999 .
16.
DAS
S.
,
KUMAR
S.
and
DASPODDAR
P. K.
Ind. Ceram. , 1997 , (1 ), 7 –22 .
17.
ANDREASSEN
A. H. M.
and
ANDERSEN
J.
Kolloid Z. , 1930 , 50 , 217 –218 .
18.
DEKEYSEN
W. L.
: in ‘Science of ceramics II ’, (ed.
Stewart
G. H.
), 243 ; 1963 , New York, NY , Academic Press .
19.
SCHUMACHER
U.
: PhD thesis , Rheinischwestfalischen Technischen Hochschule , Aachen, West Germany , 1988 .
20.
MYHRE
B.
: ‘Tabular alumina based refractory castable ’, Part 3 , Elkem Refractories , Norway , 1998 .
21.
BRADT
R. C.
: Proc. 2nd Int. Symp. Refractories , (ed.
Xiangchong
Z.
,
Jiaquan
L.
and
Maoqian
L.
15 –21 ; 1992 , Beijing , International Academic Publishers .
22.
RENDTEL
H.
,
HIBNAR
J. A.
,
RODRIGUES
V. C.
and PANDOLFELLIProc. Unitecr ‘97 , New Orleans, LA, USA , November 1997 , American Ceramic Society , 71 –80 .