Synthesis and evaluation of starch-based polymers as potential dispersants in cement pastes and self leveling compounds

In order to make concrete construction greener, new High Range Water Reducing Admixtures (HRWRAs) from natural origin-should be developed. Some natural polysaccharides and their derivates have interesting properties which explain their growing use in the field of materials. Their use is not only lin...

Full description

Saved in:
Bibliographic Details
Published in:Cement & concrete composites 2014-01, Vol.45, p.29-38
Main Authors: Crépy, Lucie, Petit, Jean-Yves, Wirquin, Eric, Martin, Patrick, Joly, Nicolas
Format: Article
Language:English
Subjects:
Analytical chemistry
Biodegradability
Cement
Cements
Chemical Sciences
Civil Engineering
Concrete construction
Eco-conception
Engineering Sciences
High range water reducing admixture
Leveling
Material chemistry
Materials
Modified starch
Organic chemistry
Pastes
Polymers
Polysaccharides
Self leveling compounds
Synthesis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to make concrete construction greener, new High Range Water Reducing Admixtures (HRWRAs) from natural origin-should be developed. Some natural polysaccharides and their derivates have interesting properties which explain their growing use in the field of materials. Their use is not only linked to the biodegradable and atoxic aspect but is also linked to the fact that they can confer new properties to cement-based materials. In the presented study, starch has been chosen as main polysaccharide chain. Starch has first been used without any modification, and then with different grafted substituents like acetate, maleate, succinate, sulfonate to mimic the structure of petrochemical HRWRAs. Some tests have been done to evaluate the potential effect of these biobased derivatives as new HRWRAs. Some of the starch-based polymers were also evaluated in a commercial self-leveling compound. Results show that a graft of sulfopropyle or sulfobutyle side chains on a starch polymer can lead to slump flows on grouts comparable with the ones obtained on PolyNaphtalene Sulfonate (PNS) based grouts, and also that starch-sulfobutyle or starch-maleate can potentially replace casein in self-leveling compounds.
ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2013.09.004