Incorporation of sludges in light expanded clay aggregates
authors Pinto, S; Rosenbom, K; Machado, L; Labrincha, JA; Ferreira, VM
editors Mandal, H; Ovecoglu, L
nationality International
journal EURO CERAMICS VIII, PTS 1-3
author keywords sludge incorporation; light expanded clay aggregates
abstract Sludges generated from paper-pulp production and water filtration/cleaning operations had been tested in the formulation of light expanded clay aggregates. Both residues are classified as non-hazardous but high daily-producing amounts (up to 100 ton. per unit) and the difficulties in reducing their volume, by suitable filter-pressing methods, require high transportation costs for disposal. The complete characterization of both residues is reported, including physical and compositional parameters and their thermal behaviour. From this knowledge, major technological constraints are identified and sludge pre-treatment requirements can be defined. Inducing effects of the sludge addition both in technological changes on the normal processing conditions of light expanded clay aggregates and in the final characteristics of the granules are discussed. Incorporation levels of about 30 wt.% in the case of paper-pulp sludge and 10 for the water filtration residue were found feasible.
publisher TRANS TECH PUBLICATIONS LTD
issn 1013-9826
isbn 0-87849-946-6
year published 2004
volume 264-268
beginning page 1391
ending page 1394
web of science category Materials Science, Ceramics; Materials Science, Characterization & Testing; Materials Science, Composites
subject category Materials Science
unique article identifier WOS:000223059700331

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