Effect of Waste Latex Paints on Rheological Properties of Cement Pastes: Compatibility with Water Reducers
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 12
Abstract
The use of industrial by-products and wastes as raw materials for the construction industry has increased in recent years. This paper seeks to assess the effect of waste latex paint (WLP) constituents on variations in flow and rheological properties of cement pastes, including their compatibility with commonly used water reducers (WRs) and timing addition during batching. The tested WLPs were not randomly collected from waste collection sites, but rather produced and stored without biocides for approximately 6 months to expire. Test results have shown that flowability is highly affected by the WLP latex content, pigment-to-extender ratio, and percentage used for the substitution of mixing water. Mixtures prepared with WLPs added before WRs led to reduced flowability, given the competitive adsorption of the latex polymers onto cement particles. Remarkable incompatibility reflected by increased cohesiveness rates over time was noticed between WLPs and polycarboxylate-based WRs.
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Acknowledgments
The author wishes to acknowledge the laboratory support of Holderchem Building Chemicals and of Finders SAL, Lebanon, for the manufacturing of paints and execution of experimental program.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Dec 2, 2014
Accepted: Mar 26, 2015
Published online: May 6, 2015
Discussion open until: Oct 6, 2015
Published in print: Dec 1, 2015
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