Effects of potable water filtration sludge on the rheological behaviour of one-coat plastering mortars
authors Raupp-Pereira, F; Silva, L; Segadaes, AM; Paiva, H; Labrincha, JA
nationality International
journal JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
author keywords mortars admixtures; workability; rheology; potable water filtration sludge
keywords PORTLAND-CEMENT; ADMIXTURES; RETARDERS; GYPSUM
abstract This work describes the study of the potential use of the sludge generated in potable water filtration/cleaning operations (waste material) as workability-aid in rendering/plastering mortars. A commercial mortar was used as reference and several formulations were investigated, containing sodium phosphate enriched was e material instead of the enriched bentonite traditionally used as workability-aid and setting retarder in cement-based compositions. Fresh mortars were characterised in terms of plasticity as a function of elapsed time. Rheological behaviour was studied with a specific rheometer. The same setting delay can be obtained with the use of the enriched sludge even by using lower contents of the additive (0.25%), but the workability window tends to be narrower. Fluidity assured by the tested admixtures is mostly controlled by changes in yield stress values of the paste. The replacement of bentonite by an equivalent amount of sodium phosphate-added waste material (ca. 0.25 wt.%) is technically feasible. (c) 2007 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0924-0136
year published 2007
volume 190
issue 1-3
beginning page 12
ending page 17
digital object identifier (doi) 10.1016/j.jmatprotec.2007.03.120
web of science category Engineering, Industrial; Engineering, Manufacturing; Materials Science, Multidisciplinary
subject category Engineering; Materials Science
unique article identifier WOS:000247422600002
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journal impact factor 3.647
5 year journal impact factor 3.817
category normalized journal impact factor percentile 82.178
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