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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1374 (February) (2010)  >  pp.107-112

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1374 (February) (2010)   pp.107 - 112 Next article>>

Preparation of geopolymeric materials from sewage sludge slag with special emphasis to the matrix compositions

Norio YAMAGUCHI1) and Ko IKEDA2)
1) Ceramic Research Center of Nagasaki
2) Yamaguchi University


  Solidification of SSS (sewage sludge slag) has been carried out by the geopolymer binder technique at 80°C steam conditions mixed with CFA (coal fly ash). Geopolymer liquor was prepared by mixing Na-disilicate solution of 1.27 S.G. (specific gravity) and 10 M NaOH solution in 3:1 proportion. Obtained monolithic materials were subjected to physical measurements such as 3-point flexural strength, bulk density and expansion-shrinkage. Subsequently, matrix as well as filler chemical compositions were analyzed by SEM-EDX. Results showed SSS is an active filler similar to CFA and maximal strength was reached by blending SSS with CFA in 1:3 proportion. P2O5 and CaO components of SSS strongly contributed to the polycondensation of the geopolymer liquor other than theoretically expected Al2O3 and SiO2 components.


Keyword:
Geopolymer, Na-silicates, Inorganic polymer, Binder, Sewage sludge, Slag, Fly ash

Received: August 17, 2009
Accepted: December 17, 2009 , Published online: February 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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