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Title

Effect of superplasticizer and shrinkage-reducing admixtures on alkali-activated slag pastes and mortars

AuthorsPalacios, Marta CSIC ORCID; Puertas, Francisca
KeywordsActivated cements
Admixtures
Mechanical properties
Workability
Issue DateJul-2005
PublisherElsevier
CitationCement and Concrete Research 35(7): 1358-1367(2005)
Abstract[EN]This paper shows how several superplasticizers (polycarboxylates, vinyl copolymers, melamine and naphthalene-based) and shrinkage-reducing (polypropylenglycol derivatives) admixtures affect the mechanical and rheological properties and setting times of alkali-activated slag pastes and mortars. Two activator solutions, waterglass and NaOH, were used, along with two concentrations—4% and 5% of Na2O by mass of slag. All admixtures, with the exception of the naphthalene-based product, lost their fluidifying properties in mortars activated with NaOH as a result of the changes in their chemical structures in high alkaline media. The difference in the behaviour of these admixtures when ordinary Portland cement is used as a binder is also discussed in this paper.
Publisher version (URL)http://dx.doi.org/10.1016/j.cemconres.2004.10.014
URIhttp://hdl.handle.net/10261/35112
DOI10.1016/j.cemconres.2004.10.014
ISSN0008-8846
Appears in Collections:(IETCC) Artículos

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