期刊
CEMENT AND CONCRETE RESEARCH
卷 35, 期 7, 页码 1358-1367出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2004.10.014
关键词
alkali activated cements; admixtures; mechanical properties; workability
This paper shows how several superplasticizers (polycarboxylates, vinyl copolymers, melamine and naphthalene-based) and shrinkage-reducing (polypropylenglycol derivatives) admixtures affect the mechanical and theological 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. (c) 2004 Elsevier Ltd. All rights reserved.
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