A pulsed field gradient and NMR imaging investigations of the water retention mechanism by cellulose ethers in mortars

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2010.04.001· OSTI ID:21484503

Patural, Laetitia ^[1]; Porion, Patrice ^[2]; Van Damme, Henri ^[3]; Govin, Alexandre; Grosseau, Philippe ^[1]; Ruot, Bertrand; Deves, Olivier ^[4]

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1. Ecole Nationale Superieure des Mines de Saint-Etienne, Centre SPIN, LPMG UMR 5148, 158 cours Fauriel, F-42023 Saint-Etienne Cedex 2 (France)
2. Centre de la Recherche sur la Matiere Divisee, CNRS-Universite d'Orleans, UMR 6619, 1b rue de la Ferollerie, F-45071 Orleans Cedex 2 (France)
3. Laboratoire de Physico-chimie des Polymeres et Milieux Disperses, ESPCI ParisTech, 10 rue Vauquelin, F-75231 Paris Cedex 05 and Universite Paris Est - LCPC, 58 boulevard Lefebvre, 75732 Paris cedex 15 (France)
4. Universite Paris-Est, Centre Scientifique et Technique du Batiment, Departement Enveloppe et Revetements/Division Enduits, Mortiers et Colles, 84 avenue Jean Jaures, F-77447 Marne-la-Vallee Cedex 2 (France)

The study presented in this paper is devoted to improve the knowledge on the influence of cellulose ethers (CE) on the freshly-mixed mortars water retention. Indeed, this crucial property is the most important imparted by these polysaccharides. One of the assumptions proposed to explain this phenomenon is that CE acts as diffusion barrier to the water. To test this hypothesis, the CE effect on the self-diffusion coefficient of water in solution and on the water mobility between two fresh cement pastes was studied by Nuclear Magnetic Resonance. CE does not significantly modify the water self-diffusion coefficient in CE solution or in admixed cement pastes. Moreover the interdiffusion imaging experiments demonstrated that the water diffusion at the paste/paste interface is not affected by the presence of cellulosic admixture.

• OSTI ID: 21484503
• Journal Information: Cement and Concrete Research, Vol. 40, Issue 9; Other Information: DOI: 10.1016/j.cemconres.2010.04.001; PII: S0008-8846(10)00101-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CELLULOSE
CEMENTS
DIFFUSION BARRIERS
ETHERS
MORTARS
NMR IMAGING
NUCLEAR MAGNETIC RESONANCE
RETENTION
SELF-DIFFUSION
SOLUTIONS
WATER
BUILDING MATERIALS
CARBOHYDRATES
DIAGNOSTIC TECHNIQUES
DIFFUSION
DISPERSIONS
HOMOGENEOUS MIXTURES
HYDROGEN COMPOUNDS
MAGNETIC RESONANCE
MATERIALS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
RESONANCE
SACCHARIDES