A laboratory and pilot plant study has shown that tannery sludges can be used in brick manufacture for up to 10% of the dry weight of bricks. Bricks containing sludge are higher in porosity than controls. Bending strength and frost resistance are acceptable at 10% but are decreased below acceptable levels in bricks made with 15% sludge. Increased emission of aromatic and chlorinated hydrocarbon vapours from the sludge in the preheating zone of the furnace could easily be taken care of by recycling this exhaust to the high temperature zone.
Anderson, M. & Jackson, G. (1983), Pulverized fuel ash in brick making, Proceedings of the 5th CERP, Faenza (Italy) 24th-27th September , in press.
2.
Boesmans, P., Colon, F.J. & Van der Velden, J.H. (1983), Bricks and tiles made of clay and town wastes, Proceedings of the 5th CERP, Faenza (Italy) 24th-27th September, in press.
3.
Brown, T. & Besetka, J. (1984), I fanghi rossi come materia prima per l'industria del laterizio (Red mud as raw material in brick production), Ceramurgia, 14, 155-160.
4.
Bryan, E.H. (1984), Biobricks become a construction reality, Water Engineering &Management, 131, 38-50.
5.
Cabrera, J.G. & Stentiford, E.I. (1983), The properties of structural lightweight bricks manufactured with pulverized fuel ash and sewage sludge . Proceedings of the 5th CERP, Faenza (Italy) 24th-27th September, in press.
6.
El-Didamony, H., Sabrah, B.A. & Hilal, N. (1983), Utilization of some rejects in making structural clay bricks, Proceedings of the 5th CERP, Faenza (Italy) 24th-27th September, in press.
7.
Fornaro, G. & Ferrero, F. (1984), Utilizzo di fango di trattamento di acque di lavaggio lana nella produzione di laterizi (Use of wool washing sludge in brick production) , Inquinamento, 25, 51-54.
8.
Giugliano, M., Bonomo, L. & Bozzini, G. (1982), Recycling of industrial sludge in the production of bricks. In Recycling International, pp. 384-389. E. Freitag, Verlag fur Umwelttechnik, Berlin.
9.
Kox, W.M.A. & Van der Vlist, E. (1981), Thermal treatment of heavy metal-containing wastes, Conservation and Recycling , 4, 29-38.
10.
Manns, W., Schneider, H. & Eichler, W. (1977), Potentialities for the utilization of metal hydroxide slurry for masonry brick production, ZI International, 3, 109-129.
11.
Ortelli, G. & Vincenzini, P. (1983), Influenza di aggiunte di fanghi ceramici sull'attitudine alle efflorescenze di una argilla da laterizi (Effects of the use of ceramic sludge upon the efflorescence of a brick clay) , Ceramurgia, 13, 241-246.
12.
Pippart, F. (1981), Landesanstalt für Umweltshutz Baden-Württemberg, Karlsruhe (F.R.G.). Personal Communication.
13.
Refroe, O. S. (Ed.) (1979), Building Materials from solid Wastes. Nojes Data Corporation , Park Ridge, New York, U.S.A.
14.
Seng, H.J. (1981), Möglichkeiten der Metallhidroxid-schlammverwertung in Zieglein (Possibilities for the use of metal hydroxide sludge in brick production). Landesanstalt für Umweltshutz, Baden-Württemberg, Karlsruhe (F.R.G.).
15.
TA Luft ( 1974), Gemensames Ministerialblatt Vol. 25, n. 24.
16.
Tucker, J.F.E. (1980), Firing of bricks from clay containing combustible components in tunnel kilns. ZI International, 1, 9-11.
