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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Effects of Superplasticizer Structure on Performance of Portland-Based Cements
Author(s): Lidia Eusebio, Andrea Casali, Marco Goisis, Giuseppe Manganelli, and Paolo Gronchi
Publication: Special Publication
Appears on pages(s): 1-14
Keywords: adsorption, blended cement, comb-polymer, mini slump test, pozzolan, slag, superplasticizer
Abstract:To reduce CO2 emission, portland clinker in industrial cement is substituted by reactive and nonreactive mineral additions.
This research examines the effect of the structure of selected polymers on their dispersing activity on three different matrixes: portland cement (CEM I 52.5R), portland slag cement (CEM II/B-S 42.5N) and pozzolanic cement (CEM IV/A-P 42.5R).
The role of the length of the main parts of a typical comb-polymer on its adsorption behavior and deflocculating capability has been evaluated. For the purpose different poly¬mers having Mw of polyacrylic backbone equal to 2000 and 5000Da and methoxy-PEO dispersing side chains equal to 1000 and 3000 Da were synthesized. Esterification ratio was fixed at 30%. Adsorption isotherms were evaluated by TOC technique while dispersing behavior by mini-slump test. It results that dimension of superplasticizer has a remarkable role on dispersing ability particularly in the case of pozzolanic cement.
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