Effects of the molecular architecture of comb-shaped superplasticizers on their performance in cementitious systems

The objective of this study is to link the molecular structure of polycarboxylate-ether-type superplasticizers with the performance of cementitious systems in order to develop new products with enhanced properties, e.g. improved water reduction with a wide range of cements or a reduced retardation o...

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Bibliographic Details
Published inCement & concrete composites Vol. 29; no. 4; pp. 251 - 262
Main Authors Winnefeld, Frank, Becker, Stefan, Pakusch, Joachim, Götz, Thomas
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2007
Subjects
Adsorption
Calorimetry
Cement
Concrete
Polycarboxylate
Rheology
Superplasticizers
Superplasticizers
Adsorption
Rheology
Cement
Calorimetry
Concrete
Polycarboxylate
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Summary:The objective of this study is to link the molecular structure of polycarboxylate-ether-type superplasticizers with the performance of cementitious systems in order to develop new products with enhanced properties, e.g. improved water reduction with a wide range of cements or a reduced retardation of cement hydration. Different experimental superplasticizers have been synthesized varying length and density of the polyether chains as well as the molecular weight of the polymer. The influence of these polymers on the properties of cement pastes and mortars was determined using various characterization methods like mortar flow, rheological and calorimetric measurements, adsorption measurements and mortar compressive strength. Characteristic connections between molecular structure of the polycarboxylate-type water reducers, adsorption behaviour, workability and retarding effect have been determined allowing the synthesis of new superplasticizers with improved performance.
ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2006.12.006