Influence of Cellulose Ether Particle Size on Water Retention of Freshly-Mixed Mortars - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2009

Influence of Cellulose Ether Particle Size on Water Retention of Freshly-Mixed Mortars

Résumé

Cellulose ethers are polymers frequently introduced into mortar formulations in order to improve water retention capacity and workability of the freshly-mixed materials. Physico-chemical parameters of these admixtures (molecular weight, granulometry, substitution degrees, etc) seem to have a strong influence on mortar water retention capacity. In this paper, the influence of cellulose ether particle size was studied. Two behaviors were highlighted regarding the particle size effect on mortar water retention. On the one hand, for cellulose ethers providing intermediate water retention, this parameter is fundamental: the thinner the particles, the better the water retention. The increase in water retention was explained by the rate of dissolution of every fraction which was faster for the thinnest particles. On the other hand, for admixtures providing strong water retention, the effect of this parameter was weaker or not relevant. Indeed, a cellulose ether concentration threshold was noticed, justifying this behavior.
Fichier principal
Vignette du fichier
LP-CANMET09.pdf (916.59 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00448369 , version 1 (18-01-2010)

Identifiants

  • HAL Id : hal-00448369 , version 1

Citer

Laetitia Patural, Alexandre Govin, Bertrand Ruot, Olivier Deves, Philippe Grosseau. Influence of Cellulose Ether Particle Size on Water Retention of Freshly-Mixed Mortars. 9th CANMET [Canada Centre for Mineral and Energy Technology] /ACI [American Concrete Institute] (International Conference on Superplasticizers and other Chemical Admixtures in Concrete), Oct 2009, Séville, Spain. ⟨hal-00448369⟩
171 Consultations
133 Téléchargements

Partager

Gmail Facebook X LinkedIn More