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Title: Combinatory approach of methacrylated alginate and acid monomers for concrete applications
Authors: Mignon, Arn
GRAULUS, Geert-Jan 
Stubbe, Birgit
Martins, Jose
Dubruel, Peter
De Belie, Nele
Van Vlierberghe, Sandra
Issue Date: 2017
Source: CARBOHYDRATE POLYMERS, 155, p. 448-455
Abstract: Polysaccharides, and especially alginate, can be useful for self-healing of cracks in concrete. Instead of weak electrostatic bonds present within calcium alginate, covalent bonds, by methacrylation of the polysaccharides, will result in mechanically stronger superabsorbent polymers (SAPs). These methacrylated alginate chains as backbone are combined with two acrylic monomers in a varying molar fraction. These SAPs show a moisture uptake capacity up to 110% their own weight at a relative humidity of 95%, with a negligible hysteresis. The swelling capacity increased (up to 246 times its own weight) with a decreasing acrylic acid/2 acrylamido-2-methylpropane sulfonic acid ratio. The SAPs also showed a thermal stability up to 200 degrees C. Interestingly, the SAP composed of alginate and acrylic acid exerted a very limited decrease in compressive strength (up to 7% with addition of 1 wt% SAP) rendering this material interesting for the envisaged self-healing application.
Notes: [Mignon, Arn; De Belie, Nele] Univ Ghent, Dept Struct Engn, Magnel Lab Concrete Res, Technol Pk Zwijnaarde 904, B-9052 Ghent, Belgium. [Mignon, Arn; Devisscher, Dries; Graulus, Geert-Jan; Stubbe, Birgit; Dubruel, Peter; Van Vlierberghe, Sandra] Univ Ghent, Dept Organ & Macromol Chem, Polymer Chem Biomat Res Grp, Krijgslaan 281,Bldg S4 Bis, B-9000 Ghent, Belgium. [Devisscher, Dries] Hasselt Univ, Inst Mat Res, Design & Synth Organ Semicond, Agoralaan 1 Bldg D, B-3590 Diepenbeek, Belgium. [Martins, Jose] Univ Ghent, Dept Organ Chem, NMR & Struct Anal Unit, Krijgslaan 281,Bldg S4 Bis, B-9000 Ghent, Belgium.
Keywords: Polysaccharide; Alginate; Self-healing; Concrete; Swelling potential; Compressive strength;polysaccharide; alginate; self-healing; concrete; swelling potential; compressive strength
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ISSN: 0144-8617
e-ISSN: 1879-1344
DOI: 10.1016/j.carbpol.2016.08.102
ISI #: 000386402600049
Rights: (C) 2016 Elsevier Ltd. All rights reserved.
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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